CINXE.COM

<!DOCTYPE html> <html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-toc-available" lang="en" dir="ltr"> <head> <meta charset="UTF-8"> <title>Floppy disk variants - Wikipedia</title> <script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-toc-available";var cookie=document.cookie.match(/(?:^|; )enwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":false,"wgSeparatorTransformTable":["",""],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy", "wgMonthNames":["","January","February","March","April","May","June","July","August","September","October","November","December"],"wgRequestId":"90bccbf6-d8ff-4202-b053-dba307fd90af","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"Floppy_disk_variants","wgTitle":"Floppy disk variants","wgCurRevisionId":1251896409,"wgRevisionId":1251896409,"wgArticleId":32179965,"wgIsArticle":true,"wgIsRedirect":false,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["CS1 Hungarian-language sources (hu)","All articles with dead external links","Articles with dead external links from June 2023","Articles with permanently dead external links","Articles with short description","Short description is different from Wikidata","Use dmy dates from August 2019","Articles containing Hungarian-language text","Articles needing additional references from October 2012","All articles needing additional references", "All articles with unsourced statements","Articles with unsourced statements from October 2007","Articles with unsourced statements from April 2010","Commons link is the pagename","Rotating disc computer storage media","Legacy hardware","American inventions","Floppy disk computer storage"],"wgPageViewLanguage":"en","wgPageContentLanguage":"en","wgPageContentModel":"wikitext","wgRelevantPageName":"Floppy_disk_variants","wgRelevantArticleId":32179965,"wgIsProbablyEditable":true,"wgRelevantPageIsProbablyEditable":true,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgRedirectedFrom":"Superfloppy","wgNoticeProject":"wikipedia","wgCiteReferencePreviewsActive":false,"wgFlaggedRevsParams":{"tags":{"status":{"levels":1}}},"wgMediaViewerOnClick":true,"wgMediaViewerEnabledByDefault":true,"wgPopupsFlags":0,"wgVisualEditor":{"pageLanguageCode":"en","pageLanguageDir":"ltr","pageVariantFallbacks":"en"},"wgMFDisplayWikibaseDescriptions":{"search":true,"watchlist":true,"tagline":false,"nearby":true}, "wgWMESchemaEditAttemptStepOversample":false,"wgWMEPageLength":50000,"wgInternalRedirectTargetUrl":"/wiki/Floppy_disk_variants#Superfloppy","wgRelatedArticlesCompat":[],"wgCentralAuthMobileDomain":false,"wgEditSubmitButtonLabelPublish":true,"wgULSPosition":"interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgWikibaseItemId":"Q5460212","wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":false,"wgGEStructuredTaskRejectionReasonTextInputEnabled":false,"wgGELevelingUpEnabledForUser":false};RLSTATE={"ext.globalCssJs.user.styles":"ready","site.styles":"ready","user.styles":"ready","ext.globalCssJs.user":"ready","user":"ready","user.options":"loading","ext.cite.styles":"ready","ext.tmh.player.styles":"ready","skins.vector.search.codex.styles":"ready", "skins.vector.styles":"ready","skins.vector.icons":"ready","jquery.makeCollapsible.styles":"ready","ext.wikimediamessages.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready","ext.uls.interlanguage":"ready","wikibase.client.init":"ready","ext.wikimediaBadges":"ready"};RLPAGEMODULES=["mediawiki.action.view.redirect","ext.cite.ux-enhancements","mediawiki.page.media","ext.tmh.player","site","mediawiki.page.ready","jquery.makeCollapsible","mediawiki.toc","skins.vector.js","ext.centralNotice.geoIP","ext.centralNotice.startUp","ext.gadget.ReferenceTooltips","ext.gadget.switcher","ext.urlShortener.toolbar","ext.centralauth.centralautologin","mmv.bootstrap","ext.popups","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader","ext.echo.centralauth","ext.eventLogging","ext.wikimediaEvents","ext.navigationTiming","ext.uls.interface","ext.cx.eventlogging.campaigns","ext.cx.uls.quick.actions","wikibase.client.vector-2022","ext.checkUser.clientHints", "ext.growthExperiments.SuggestedEditSession","wikibase.sidebar.tracking"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.impl(function(){return["user.options@12s5i",function($,jQuery,require,module){mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"}); }];});});</script> <link rel="stylesheet" href="/w/load.php?lang=en&modules=ext.cite.styles%7Cext.tmh.player.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022"> <script async="" src="/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.4"> <meta name="referrer" content="origin"> <meta name="referrer" content="origin-when-cross-origin"> <meta name="robots" content="max-image-preview:standard"> <meta name="format-detection" content="telephone=no"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/d/d6/Maxell_Compact_Floppy_Disk_CF2-D_20050125.jpg"> <meta property="og:image:width" content="1200"> <meta property="og:image:height" content="1505"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/d/d6/Maxell_Compact_Floppy_Disk_CF2-D_20050125.jpg"> <meta property="og:image:width" content="800"> <meta property="og:image:height" content="1003"> <meta property="og:image:width" content="640"> <meta property="og:image:height" content="803"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="Floppy disk variants - Wikipedia"> <meta property="og:type" content="website"> <link rel="preconnect" href="//upload.wikimedia.org"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//en.m.wikipedia.org/wiki/Floppy_disk_variants#Superfloppy"> <link rel="alternate" type="application/x-wiki" title="Edit this page" href="/w/index.php?title=Floppy_disk_variants&action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (en)"> <link rel="EditURI" type="application/rsd+xml" href="//en.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://en.wikipedia.org/wiki/Floppy_disk_variants#Superfloppy"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en"> <link rel="alternate" type="application/atom+xml" title="Wikipedia Atom feed" href="/w/index.php?title=Special:RecentChanges&feed=atom"> <link rel="dns-prefetch" href="//meta.wikimedia.org" /> <link rel="dns-prefetch" href="//login.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-Floppy_disk_variants rootpage-Floppy_disk_variants skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Jump to content</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Main menu" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Main menu</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Main menu</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">hide</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigation </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Main_Page" title="Visit the main page [z]" accesskey="z"><span>Main page</span></a></li><li id="n-contents" class="mw-list-item"><a href="/wiki/Wikipedia:Contents" title="Guides to browsing Wikipedia"><span>Contents</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Portal:Current_events" title="Articles related to current events"><span>Current events</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Special:Random" title="Visit a randomly selected article [x]" accesskey="x"><span>Random article</span></a></li><li id="n-aboutsite" class="mw-list-item"><a href="/wiki/Wikipedia:About" title="Learn about Wikipedia and how it works"><span>About Wikipedia</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us" title="How to contact Wikipedia"><span>Contact us</span></a></li> </ul> </div> </div> <div id="p-interaction" class="vector-menu mw-portlet mw-portlet-interaction" > <div class="vector-menu-heading"> Contribute </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-help" class="mw-list-item"><a href="/wiki/Help:Contents" title="Guidance on how to use and edit Wikipedia"><span>Help</span></a></li><li id="n-introduction" class="mw-list-item"><a href="/wiki/Help:Introduction" title="Learn how to edit Wikipedia"><span>Learn to edit</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Community_portal" title="The hub for editors"><span>Community portal</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Special:RecentChanges" title="A list of recent changes to Wikipedia [r]" accesskey="r"><span>Recent changes</span></a></li><li id="n-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_upload_wizard" title="Add images or other media for use on Wikipedia"><span>Upload file</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Main_Page" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="The Free Encyclopedia" src="/static/images/mobile/copyright/wikipedia-tagline-en.svg" width="117" height="13" style="width: 7.3125em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Special:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Search Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia" aria-label="Search Wikipedia" autocapitalize="sentences" title="Search Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Personal tools"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Appearance" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Appearance</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&returnto=Floppy+disk+variants" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&returnto=Floppy+disk+variants" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o" class=""><span>Log in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Log in and more options" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personal tools" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personal tools</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en"><span>Donate</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=Floppy+disk+variants" title="You are encouraged to create an account and log in; however, it is not mandatory"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Create account</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:UserLogin&returnto=Floppy+disk+variants" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contents" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contents</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-Non-standard_media_and_devices" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Non-standard_media_and_devices"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Non-standard media and devices</span> </div> </a> <button aria-controls="toc-Non-standard_media_and_devices-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Non-standard media and devices subsection</span> </button> <ul id="toc-Non-standard_media_and_devices-sublist" class="vector-toc-list"> <li id="toc-IBM_DemiDiskette" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#IBM_DemiDiskette"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>IBM DemiDiskette</span> </div> </a> <ul id="toc-IBM_DemiDiskette-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Tabor_Drivette" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Tabor_Drivette"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Tabor Drivette</span> </div> </a> <ul id="toc-Tabor_Drivette-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-3-inch_"MCD-1_Micro_Cassette"" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#3-inch_"MCD-1_Micro_Cassette""> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3</span> <span>3-inch "MCD-1 Micro Cassette"</span> </div> </a> <ul id="toc-3-inch_"MCD-1_Micro_Cassette"-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-3-inch_"Compact_Floppy_Disk"_/_"CF-2"_format" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#3-inch_"Compact_Floppy_Disk"_/_"CF-2"_format"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>3-inch "Compact Floppy Disk" / "CF-2" format</span> </div> </a> <ul id="toc-3-inch_"Compact_Floppy_Disk"_/_"CF-2"_format-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Quick_Disk_variants" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Quick_Disk_variants"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5</span> <span>Quick Disk variants</span> </div> </a> <ul id="toc-Quick_Disk_variants-sublist" class="vector-toc-list"> <li id="toc-Famicom_Disk_System" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Famicom_Disk_System"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5.1</span> <span>Famicom Disk System</span> </div> </a> <ul id="toc-Famicom_Disk_System-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Smith_Corona_DataDisk" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Smith_Corona_DataDisk"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5.2</span> <span>Smith Corona DataDisk</span> </div> </a> <ul id="toc-Smith_Corona_DataDisk-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Sharp_2.5-inch_floppy_disk" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Sharp_2.5-inch_floppy_disk"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.6</span> <span>Sharp 2.5-inch floppy disk</span> </div> </a> <ul id="toc-Sharp_2.5-inch_floppy_disk-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-2-inch_floppy_disks" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#2-inch_floppy_disks"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.7</span> <span>2-inch floppy disks</span> </div> </a> <ul id="toc-2-inch_floppy_disks-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Extended_use_cases" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Extended_use_cases"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Extended use cases</span> </div> </a> <button aria-controls="toc-Extended_use_cases-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Extended use cases subsection</span> </button> <ul id="toc-Extended_use_cases-sublist" class="vector-toc-list"> <li id="toc-Flippy_disks" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Flippy_disks"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Flippy disks</span> </div> </a> <ul id="toc-Flippy_disks-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Auto-loaders" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Auto-loaders"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Auto-loaders</span> </div> </a> <ul id="toc-Auto-loaders-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Floppy_mass_storage" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Floppy_mass_storage"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>Floppy mass storage</span> </div> </a> <ul id="toc-Floppy_mass_storage-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Super_floppy" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Super_floppy"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Super floppy</span> </div> </a> <button aria-controls="toc-Super_floppy-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Super floppy subsection</span> </button> <ul id="toc-Super_floppy-sublist" class="vector-toc-list"> <li id="toc-Floptical" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Floptical"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Floptical</span> </div> </a> <ul id="toc-Floptical-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Flextra" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Flextra"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Flextra</span> </div> </a> <ul id="toc-Flextra-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Zip_drive" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Zip_drive"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Zip drive</span> </div> </a> <ul id="toc-Zip_drive-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-LS-120/LS-240" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#LS-120/LS-240"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.4</span> <span>LS-120/LS-240</span> </div> </a> <ul id="toc-LS-120/LS-240-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sony_HiFD" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Sony_HiFD"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.5</span> <span>Sony HiFD</span> </div> </a> <ul id="toc-Sony_HiFD-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Caleb_Technology’s_UHD144" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Caleb_Technology’s_UHD144"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.6</span> <span>Caleb Technology’s UHD144</span> </div> </a> <ul id="toc-Caleb_Technology’s_UHD144-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Custom_formatting_types_on_3½-inch_and_5¼-inch_media" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Custom_formatting_types_on_3½-inch_and_5¼-inch_media"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Custom formatting types on 3½-inch and 5¼-inch media</span> </div> </a> <button aria-controls="toc-Custom_formatting_types_on_3½-inch_and_5¼-inch_media-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Custom formatting types on 3½-inch and 5¼-inch media subsection</span> </button> <ul id="toc-Custom_formatting_types_on_3½-inch_and_5¼-inch_media-sublist" class="vector-toc-list"> <li id="toc-Commodore_64/128" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Commodore_64/128"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Commodore 64/128</span> </div> </a> <ul id="toc-Commodore_64/128-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Atari_8-bit_line" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Atari_8-bit_line"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Atari 8-bit line</span> </div> </a> <ul id="toc-Atari_8-bit_line-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Amiga" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Amiga"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3</span> <span>Amiga</span> </div> </a> <ul id="toc-Amiga-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Acorn_Electron,_BBC_Micro,_and_Archimedes" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Acorn_Electron,_BBC_Micro,_and_Archimedes"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.4</span> <span>Acorn Electron, BBC Micro, and Archimedes</span> </div> </a> <ul id="toc-Acorn_Electron,_BBC_Micro,_and_Archimedes-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliography" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Bibliography"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Bibliography</span> </div> </a> <ul id="toc-Bibliography-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Floppy disk variants</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="This article exist only in this language. Add the article for other languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-0" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">Add languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> <div class="after-portlet after-portlet-lang"><span class="uls-after-portlet-link"></span><span class="wb-langlinks-add wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q5460212#sitelinks-wikipedia" title="Add interlanguage links" class="wbc-editpage">Add links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Floppy_disk_variants" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:Floppy_disk_variants" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Floppy_disk_variants"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Floppy_disk_variants&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Floppy_disk_variants&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Floppy_disk_variants"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Floppy_disk_variants&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Floppy_disk_variants&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/Floppy_disk_variants" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/Floppy_disk_variants" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages" title="A list of all special pages [q]" accesskey="q"><span>Special pages</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Floppy_disk_variants&oldid=1251896409" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Floppy_disk_variants&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&page=Floppy_disk_variants&id=1251896409&wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFloppy_disk_variants%23Superfloppy"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFloppy_disk_variants%23Superfloppy"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=Floppy_disk_variants&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Floppy_disk_variants&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q5460212" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=Superfloppy&redirect=no" class="mw-redirect" title="Superfloppy">Superfloppy</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Types of floppy disk formats</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">"Superfloppy" redirects here. For the MSD floppy drive, see <a href="/wiki/MSD_Super_Disk" title="MSD Super Disk">MSD Super Disk</a>.</div> <p class="mw-empty-elt"> </p> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Maxell_Compact_Floppy_Disk_CF2-D_20050125.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Maxell_Compact_Floppy_Disk_CF2-D_20050125.jpg/220px-Maxell_Compact_Floppy_Disk_CF2-D_20050125.jpg" decoding="async" width="220" height="276" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/d/d6/Maxell_Compact_Floppy_Disk_CF2-D_20050125.jpg 1.5x" data-file-width="319" data-file-height="400" /></a><figcaption>A Maxell-branded 3-inch Compact Floppy Disk</figcaption></figure> <p>The <a href="/wiki/Floppy_disk" title="Floppy disk">floppy disk</a> is a data storage and transfer medium that was ubiquitous from the mid-1970s well into the 2000s.<sup id="cite_ref-Fletcher_2007_1-0" class="reference"><a href="#cite_note-Fletcher_2007-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Besides the 3½-inch and 5¼-inch formats used in <a href="/wiki/IBM_PC_compatible" class="mw-redirect" title="IBM PC compatible">IBM PC compatible</a> systems, or the <a href="/wiki/Floppy_disk#8-inch_floppy_disk" title="Floppy disk">8-inch</a> format that preceded them, many proprietary floppy disk formats were developed, either using a different disk design or special layout and encoding methods for the data held on the disk. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Non-standard_media_and_devices">Non-standard media and devices</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=1" title="Edit section: Non-standard media and devices"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="IBM_DemiDiskette"><span class="anchor" id="DemiDiskette"></span>IBM DemiDiskette</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=2" title="Edit section: IBM DemiDiskette"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:IBM_DemiDiskette_Drive_and_Media.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/IBM_DemiDiskette_Drive_and_Media.jpg/220px-IBM_DemiDiskette_Drive_and_Media.jpg" decoding="async" width="220" height="242" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/IBM_DemiDiskette_Drive_and_Media.jpg/330px-IBM_DemiDiskette_Drive_and_Media.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/dc/IBM_DemiDiskette_Drive_and_Media.jpg/440px-IBM_DemiDiskette_Drive_and_Media.jpg 2x" data-file-width="1420" data-file-height="1559" /></a><figcaption>IBM DemiDiskette media and Model 341 FDD</figcaption></figure> <p>In the early 1980s, IBM Rochester developed a 4-inch floppy disk drive, the Model 341 and an associated diskette, the DemiDiskette. At about half the size of the original 8-inch floppy disk the name derived from the prefix <i><a href="/wiki/Demi_(metric_prefix)" class="mw-redirect" title="Demi (metric prefix)">demi</a></i> for "half". This program was driven by aggressive cost goals, but missed the pulse of the industry. The prospective users, both inside and outside IBM, preferred standardization to what by release time were small cost reductions, and were unwilling to retool packaging, interface chips and applications for a proprietary design. The product was announced and withdrawn in 1983<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> with only a few units shipped. IBM wrote off several hundred million dollars of development and manufacturing facility. IBM obtained patent number <span><a rel="nofollow" class="external text" href="https://patents.google.com/patent/US4482929">U.S. patent 4,482,929</a></span> on the media and the drive for the DemiDiskette. </p> <div class="mw-heading mw-heading3"><h3 id="Tabor_Drivette"><span class="anchor" id="Drivette"></span>Tabor Drivette</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=3" title="Edit section: Tabor Drivette"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Dysan_3.25%22_Flex_Diskette.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/Dysan_3.25%22_Flex_Diskette.jpg/220px-Dysan_3.25%22_Flex_Diskette.jpg" decoding="async" width="220" height="100" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/Dysan_3.25%22_Flex_Diskette.jpg/330px-Dysan_3.25%22_Flex_Diskette.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/26/Dysan_3.25%22_Flex_Diskette.jpg/440px-Dysan_3.25%22_Flex_Diskette.jpg 2x" data-file-width="3150" data-file-height="1425" /></a><figcaption><a href="/wiki/Dysan" title="Dysan">Dysan</a> 3¼" Flex Diskettes (P/N 802950)</figcaption></figure> <p>Another unsuccessful diskette variant was the <i>Drivette</i>, a 3¼-inch diskette drive marketed by Tabor Corporation of Westland, Massachusetts, USA between 1983 and 1985 with media supplied by <a href="/wiki/Dysan" title="Dysan">Dysan</a>, Brown and <a href="/wiki/3M" title="3M">3M</a>. The diskettes were named <i>Dysan 3¼" Flex Diskette</i> (P/N 802950), <i>Tabor 3¼" Flex Diskette</i> (P/N D3251), sometimes also nicknamed "Tabor" or "Brown" at tradeshows. The <i>Microfloppy Disk Drive TC 500</i> was a single-sided quad-density drive with a nominal storage capacity of 500 KB (80 tracks, 140 tpi, 16 sectors, 300 rpm, 250 kbit/s, 9,250 bpi with MFM).<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Foone_2018_7-0" class="reference"><a href="#cite_note-Foone_2018-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Foone_2020_9-0" class="reference"><a href="#cite_note-Foone_2020-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> It could work with standard controllers for 5¼-inch floppy disks. Since August 1984, it was used in the <a href="/wiki/Seequa_Chameleon_325" class="mw-redirect" title="Seequa Chameleon 325">Seequa Chameleon 325</a>, an early <a href="/wiki/CP/M" title="CP/M">CP/M-80</a> & <a href="/wiki/MS-DOS" title="MS-DOS">MS-DOS</a> portable computer with both <a href="/wiki/Zilog_Z80" title="Zilog Z80">Z80</a> and <a href="/wiki/Intel_8088" title="Intel 8088">8088</a> processors. It was also offered in limited quantity with some <a href="/wiki/PDP-11/23" class="mw-redirect" title="PDP-11/23">PDP-11/23</a>-based workstations by General Scientific Corporation. Originally, Educational Microcomputer Systems (EMS) announced a system using this drive as well, but later changed plans to use 3½-inch diskette drives instead.<sup id="cite_ref-BYTE_1984_10-0" class="reference"><a href="#cite_note-BYTE_1984-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="3-inch_"MCD-1_Micro_Cassette""><span id="3-inch_.22MCD-1_Micro_Cassette.22"></span><span class="anchor" id="MCD-1"></span>3-inch "MCD-1 Micro Cassette"</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=4" title="Edit section: 3-inch "MCD-1 Micro Cassette""><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:MCD-1_Commodore_3%22_floppy_(crop_filter).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/MCD-1_Commodore_3%22_floppy_%28crop_filter%29.jpg/220px-MCD-1_Commodore_3%22_floppy_%28crop_filter%29.jpg" decoding="async" width="220" height="185" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f5/MCD-1_Commodore_3%22_floppy_%28crop_filter%29.jpg/330px-MCD-1_Commodore_3%22_floppy_%28crop_filter%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f5/MCD-1_Commodore_3%22_floppy_%28crop_filter%29.jpg/440px-MCD-1_Commodore_3%22_floppy_%28crop_filter%29.jpg 2x" data-file-width="1899" data-file-height="1596" /></a><figcaption>MCD-1 drive and disk cassettes</figcaption></figure> <p>A magnetic disk in a hard plastic shell was invented by <a href="/w/index.php?title=Marcell_J%C3%A1nosi&action=edit&redlink=1" class="new" title="Marcell Jánosi (page does not exist)">Marcell Jánosi</a><span class="noprint" style="font-size:85%; font-style: normal;"> [<a href="https://hu.wikipedia.org/wiki/J%C3%A1nosi_Marcell" class="extiw" title="hu:Jánosi Marcell">hu</a>]</span>, who was working at the Hungarian Budapest Radio Technology Factory (<span title="Hungarian-language text"><i lang="hu">Budapesti Rádiótechnikai Gyár</i></span>, BRG), in 1973.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> In 1982, such a product, the 3-inch MCD-1 was announced internationally and <a href="/wiki/Jack_Tramiel" title="Jack Tramiel">Jack Tramiel</a> showed interest in using the technology in his <a href="/wiki/Commodore_International" title="Commodore International">Commodore</a> computers, but negotiations fell through.<sup id="cite_ref-MCD-1_1_13-0" class="reference"><a href="#cite_note-MCD-1_1-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> Versions of the floppy drive were released in minimal quantity for the <a href="/wiki/ZX_Spectrum" title="ZX Spectrum">ZX Spectrum</a> and <a href="/wiki/Commodore_64" title="Commodore 64">Commodore 64</a>, and some computers made in East Germany were also equipped with one.<sup id="cite_ref-MCD-1_2_14-0" class="reference"><a href="#cite_note-MCD-1_2-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> The floppies are single sided and can hold up to 149 KB of data when <a href="/wiki/Modified_frequency_modulation" title="Modified frequency modulation">MFM</a> formatted. The drives were compatible with contemporary <a href="/wiki/Floppy-disk_controller" title="Floppy-disk controller">floppy controllers</a>.<sup id="cite_ref-MCD-1_3_15-0" class="reference"><a href="#cite_note-MCD-1_3-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-MCD-1_4_16-0" class="reference"><a href="#cite_note-MCD-1_4-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> Production was very limited in the early 1980s due to manufacturing problems and the product was abandoned by 1984 after the industry adopted a standard 3.5 inch format.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="3-inch_"Compact_Floppy_Disk"_/_"CF-2"_format"><span id="3-inch_.22Compact_Floppy_Disk.22_.2F_.22CF-2.22_format"></span><span class="anchor" id="compact_floppy"></span>3-inch "Compact Floppy Disk" / "CF-2" format</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=5" title="Edit section: 3-inch "Compact Floppy Disk" / "CF-2" format"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:AMSoft_Compact_Floppy_Disc_20071208.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4b/AMSoft_Compact_Floppy_Disc_20071208.jpg/220px-AMSoft_Compact_Floppy_Disc_20071208.jpg" decoding="async" width="220" height="275" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4b/AMSoft_Compact_Floppy_Disc_20071208.jpg/330px-AMSoft_Compact_Floppy_Disc_20071208.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4b/AMSoft_Compact_Floppy_Disc_20071208.jpg/440px-AMSoft_Compact_Floppy_Disc_20071208.jpg 2x" data-file-width="1117" data-file-height="1398" /></a><figcaption>A 3-inch floppy disk by <a href="/wiki/Amstrad" title="Amstrad">Amstrad</a>. This format was used by their <a href="/wiki/Amstrad_CPC" title="Amstrad CPC">CPC</a> and <a href="/wiki/ZX_Spectrum#Amstrad_models" title="ZX Spectrum">Spectrum</a> lines and in some systems by other manufacturers.</figcaption></figure> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:FloppyDisk3InchAmstrad.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/FloppyDisk3InchAmstrad.jpg/220px-FloppyDisk3InchAmstrad.jpg" decoding="async" width="220" height="198" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/FloppyDisk3InchAmstrad.jpg/330px-FloppyDisk3InchAmstrad.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4c/FloppyDisk3InchAmstrad.jpg/440px-FloppyDisk3InchAmstrad.jpg 2x" data-file-width="852" data-file-height="768" /></a><figcaption>An Amstrad 3-inch floppy drive</figcaption></figure> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><span><audio id="mwe_player_0" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="220" style="width:220px;" data-durationhint="26" data-mwtitle="CPC6128_loading_Turbo_Esprit_from_floppy_disk.flac" data-mwprovider="wikimediacommons" resource="/wiki/File:CPC6128_loading_Turbo_Esprit_from_floppy_disk.flac"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/6/6c/CPC6128_loading_Turbo_Esprit_from_floppy_disk.flac/CPC6128_loading_Turbo_Esprit_from_floppy_disk.flac.ogg" type="audio/ogg; codecs="vorbis"" data-transcodekey="ogg" data-width="0" data-height="0" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/6/6c/CPC6128_loading_Turbo_Esprit_from_floppy_disk.flac/CPC6128_loading_Turbo_Esprit_from_floppy_disk.flac.mp3" type="audio/mpeg" data-transcodekey="mp3" data-width="0" data-height="0" /><source src="//upload.wikimedia.org/wikipedia/commons/6/6c/CPC6128_loading_Turbo_Esprit_from_floppy_disk.flac" type="audio/flac" data-width="0" data-height="0" /><track src="https://commons.wikimedia.org/w/api.php?action=timedtext&title=File%3ACPC6128_loading_Turbo_Esprit_from_floppy_disk.flac&lang=en&trackformat=vtt&origin=%2A" kind="subtitles" type="text/vtt" srclang="en" label="English ‪(en)‬" data-dir="ltr" /></audio></span><figcaption>An Amstrad CPC loading a game from floppy disk</figcaption></figure> <p>The 3-inch "Compact Floppy Disk" or "CF-2"<sup id="cite_ref-cpcwiki_18-0" class="reference"><a href="#cite_note-cpcwiki-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> was an intended rival to Sony's 3.5" floppy system<sup id="cite_ref-pcmag_cf_19-0" class="reference"><a href="#cite_note-pcmag_cf-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> introduced by a consortium of manufacturers led by <a href="/wiki/Matsushita_Electric_Industrial" class="mw-redirect" title="Matsushita Electric Industrial">Matsushita</a>.<sup id="cite_ref-pcmag_cf_19-1" class="reference"><a href="#cite_note-pcmag_cf-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Hitachi" title="Hitachi">Hitachi</a> was a manufacturer of 3-inch disk drives, and stated in advertisements, "It's clear that the 3" floppy will become the new standard."<sup id="cite_ref-byte198401_20-0" class="reference"><a href="#cite_note-byte198401-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p><p>The format was widely used by <a href="/wiki/Amstrad" title="Amstrad">Amstrad</a> in their <a href="/wiki/Amstrad_CPC" title="Amstrad CPC">CPC</a> and <a href="/wiki/Amstrad_PCW" title="Amstrad PCW">PCW</a> computers, and (after Amstrad took over manufacture of the line) the <a href="/wiki/ZX_Spectrum#plus3" title="ZX Spectrum">Sinclair ZX Spectrum +3</a>. It was also adopted by some first-party manufacturers/systems such as <a href="/wiki/Sega" title="Sega">Sega</a>, <a href="/wiki/Yamaha_Corporation" title="Yamaha Corporation">Yamaha</a>, the <a href="/wiki/Oric_(computer)" title="Oric (computer)">Oric</a>, the <a href="/wiki/Tatung_Einstein" title="Tatung Einstein">Tatung Einstein</a>, and Timex of Portugal in the <a href="/wiki/Timex_FDD3000" title="Timex FDD3000">FDD and FDD-3000 disk drives</a> and a number of third-party vendors such as <a href="/wiki/Amdek" title="Amdek">Amdek</a>, AMS, and <a href="/wiki/Cumana_(company)" title="Cumana (company)">Cumana</a> who provided drives for use with the <a href="/wiki/Apple_II" title="Apple II">Apple II</a>, <a href="/wiki/Atari_8-bit_computers" title="Atari 8-bit computers">Atari 8-bit computers</a>, <a href="/wiki/BBC_Micro" title="BBC Micro">BBC Micro</a>, and <a href="/wiki/TRS-80_Color_Computer" title="TRS-80 Color Computer">TRS-80 Color Computer</a>. Despite this, the format was not a major success.<sup id="cite_ref-pcmag_cf_19-2" class="reference"><a href="#cite_note-pcmag_cf-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> </p><p>Three-inch diskettes bear much similarity to the <style data-mw-deduplicate="TemplateStyles:r1154941027">.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .den{vertical-align:sub}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}</style><span class="frac">3<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">2</span></span>-inch size, but with some unique features. One example is the more elongated plastic casing, taller than a <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">3<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">2</span></span>-inch disk, but less wide and thicker (i.e. with increased depth). The actual 3-inch magnetic-coated disk occupies less than 50% of the space inside the casing, the rest being used by the complex protection and sealing mechanisms implemented on the disks, which thus are largely responsible for the thickness, length, and relatively high costs of the disks. On the early Amstrad machines (the CPC line and the PCW 8256), the disks are typically flipped over to change the side (acting like 2 separate single-sided disks, comparable to the "flippy disks" of <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">5<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">4</span></span>-inch media) as opposed to being contiguously double-sided. Double-sided mechanisms were introduced on the later PCW 8512 and PCW 9512, thus removing the need to remove, flip, and then reinsert the disk. </p> <div class="mw-heading mw-heading3"><h3 id="Quick_Disk_variants">Quick Disk variants</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=6" title="Edit section: Quick Disk variants"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Nintendo-Famicom-Disk-System-Floppy.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Nintendo-Famicom-Disk-System-Floppy.jpg/220px-Nintendo-Famicom-Disk-System-Floppy.jpg" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Nintendo-Famicom-Disk-System-Floppy.jpg/330px-Nintendo-Famicom-Disk-System-Floppy.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Nintendo-Famicom-Disk-System-Floppy.jpg/440px-Nintendo-Famicom-Disk-System-Floppy.jpg 2x" data-file-width="2936" data-file-height="2936" /></a><figcaption>3-inch diskette of <a href="/wiki/Nintendo" title="Nintendo">Nintendo</a> <a href="/wiki/Famicom_Disk_System" title="Famicom Disk System">Famicom Disk Systems</a></figcaption></figure> <p><a href="/wiki/Mitsumi" class="mw-redirect" title="Mitsumi">Mitsumi</a> marketed several 3-inch diskette "Quick Disk" formats for OEM use. They used 2.8-inch magnetic discs. The OEM could decide on the outer case of the media which led to several mechanically incompatible solutions: </p> <div class="mw-heading mw-heading4"><h4 id="Famicom_Disk_System">Famicom Disk System</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=7" title="Edit section: Famicom Disk System"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Japanese <a href="/wiki/Nintendo" title="Nintendo">Nintendo</a> <a href="/wiki/Famicom_Disk_System" title="Famicom Disk System">Famicom Disk System</a> used proprietary 3-inch diskettes called "Disk Cards" between 1986 and 1990. </p> <div class="mw-heading mw-heading4"><h4 id="Smith_Corona_DataDisk">Smith Corona DataDisk</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=8" title="Edit section: Smith Corona DataDisk"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Smith_corona_2.8_inch_3_inch_diskette.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6a/Smith_corona_2.8_inch_3_inch_diskette.jpg/220px-Smith_corona_2.8_inch_3_inch_diskette.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6a/Smith_corona_2.8_inch_3_inch_diskette.jpg/330px-Smith_corona_2.8_inch_3_inch_diskette.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6a/Smith_corona_2.8_inch_3_inch_diskette.jpg/440px-Smith_corona_2.8_inch_3_inch_diskette.jpg 2x" data-file-width="640" data-file-height="480" /></a><figcaption>3-inch diskette from <a href="/wiki/Smith_Corona" title="Smith Corona">Smith Corona</a> labelled 2.8-inch for the diameter of the magnetic disc itself</figcaption></figure> <p>Many <a href="/wiki/Smith_Corona" title="Smith Corona">Smith Corona</a> "CoronaPrint" word-processor typewriters used a proprietary double-sided 3-inch diskette format named "DataDisk". Confusingly, it was labelled 2.8-inch reflecting the diameter of the magnetic disk itself rather than the media's case. </p> <div class="mw-heading mw-heading3"><h3 id="Sharp_2.5-inch_floppy_disk">Sharp 2.5-inch floppy disk</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=9" title="Edit section: Sharp 2.5-inch floppy disk"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 1986, <a href="/wiki/Sharp_Corporation" title="Sharp Corporation">Sharp</a> introduced a 2.5-inch floppy disk format for use with their family of <a href="/wiki/BASIC" title="BASIC">BASIC</a> <a href="/wiki/Pocket_computer" title="Pocket computer">pocket computers</a>.<sup id="cite_ref-Sharp_1986_CE1600F_21-0" class="reference"><a href="#cite_note-Sharp_1986_CE1600F-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Sharp_1986_CE140F_22-0" class="reference"><a href="#cite_note-Sharp_1986_CE140F-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-1986_maxell_drives_23-0" class="reference"><a href="#cite_note-1986_maxell_drives-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> Two drives were produced: the <a href="/wiki/Sharp_CE-1600F" class="mw-redirect" title="Sharp CE-1600F">Sharp CE-1600F</a><sup id="cite_ref-Sharp_1986_CE1600F_21-1" class="reference"><a href="#cite_note-Sharp_1986_CE1600F-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> and the <a href="/w/index.php?title=Sharp_CE-140F&action=edit&redlink=1" class="new" title="Sharp CE-140F (page does not exist)">CE-140F</a> (chassis: FDU-250).<sup id="cite_ref-Sharp_1986_CE140F_22-1" class="reference"><a href="#cite_note-Sharp_1986_CE140F-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> Both took <a href="/wiki/Flippy_disk" class="mw-redirect" title="Flippy disk">turnable</a> diskettes named <a href="/wiki/Sharp_CE-1650F" class="mw-redirect" title="Sharp CE-1650F">CE-1650F</a> with a total capacity of 2×64 KB (128 KB) at <span class="nowrap"><span data-sort-value="7004624640000000000♠"></span>62<span style="margin-left:.25em;">464</span></span> bytes per side (512 byte sectors, 8 sectors/track, 16 tracks (00..15), 48 tpi, 250 kbit/s, 270 rpm with <a href="/wiki/GCR_(4/5)" class="mw-redirect" title="GCR (4/5)">GCR (4/5)</a> recording).<sup id="cite_ref-Sharp_1986_CE1600F_21-2" class="reference"><a href="#cite_note-Sharp_1986_CE1600F-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Sharp_1986_CE140F_22-2" class="reference"><a href="#cite_note-Sharp_1986_CE140F-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="2-inch_floppy_disks">2-inch floppy disks</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=10" title="Edit section: 2-inch floppy disks"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Video_Floppy_Disk_-_front_(gabbe).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Video_Floppy_Disk_-_front_%28gabbe%29.jpg/220px-Video_Floppy_Disk_-_front_%28gabbe%29.jpg" decoding="async" width="220" height="166" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Video_Floppy_Disk_-_front_%28gabbe%29.jpg/330px-Video_Floppy_Disk_-_front_%28gabbe%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Video_Floppy_Disk_-_front_%28gabbe%29.jpg/440px-Video_Floppy_Disk_-_front_%28gabbe%29.jpg 2x" data-file-width="2082" data-file-height="1570" /></a><figcaption>2-inch <a href="/wiki/Video_floppy" class="mw-redirect" title="Video floppy">video floppy</a> from Canon</figcaption></figure> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Video_Floppy" title="Video Floppy">Video Floppy</a> and <a href="/wiki/PocketZip" title="PocketZip">PocketZip</a></div> <p>At least two incompatible floppy disks measuring two inches appeared in the 1980s. </p><p>One of these, officially referred to as a Video Floppy (or VF for short) can be used to store video information for <a href="/wiki/Still_video_camera" title="Still video camera">still video cameras</a> such as the original <a href="/wiki/Sony" title="Sony">Sony</a> Mavica (not to be confused with later Digital <a href="/wiki/Mavica" class="mw-redirect" title="Mavica">Mavica</a> models) and the Ion and Xapshot cameras from <a href="/wiki/Canon_(company)" class="mw-redirect" title="Canon (company)">Canon</a>. VF is not a digital data format; each track on the disk stores one video field in the analog <a href="/wiki/Interlaced_video" title="Interlaced video">interlaced</a> <a href="/wiki/Composite_video" title="Composite video">composite video</a> format in either the North American <a href="/wiki/NTSC" title="NTSC">NTSC</a> or European <a href="/wiki/PAL" title="PAL">PAL</a> standard. This yields a capacity of 25 images per disk in frame mode and 50 in field mode. </p> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:LT-1-disk-front.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/0/0f/LT-1-disk-front.png" decoding="async" width="145" height="164" class="mw-file-element" data-file-width="145" data-file-height="164" /></a><figcaption>2-inch LT-1 floppy disk from Fuji</figcaption></figure> <p>Another 2-inch format, the LT-1, is digitally formatted—720 kB, 245 TPI, 80 tracks/side, double-sided, double-density. They are used exclusively in the <a href="/wiki/Zenith_MinisPORT" class="mw-redirect" title="Zenith MinisPORT">Zenith MinisPORT</a> laptop computer circa 1989. Although the media exhibited nearly identical performance to the 3½-inch disks of the time, they were not very successful. This was due in part to the scarcity of other devices using this drive making it impractical for software transfer, and high media cost which was much more than 3½-inch and 5¼-inch disks of the time. </p><p>Much later, another 2-inch (case size: 54.5 mm × 50.2 mm × 2.0 mm) miniature disk format was <a href="/wiki/Iomega" title="Iomega">Iomega</a>'s <a href="/wiki/PocketZip" title="PocketZip">PocketZip</a> (originally named <a href="/wiki/Clik!" class="mw-redirect" title="Clik!">Clik!</a>), introduced in 1999. The disks could store 40 MB. The external drives were available as <a href="/wiki/PC_Card" title="PC Card">PC Card</a> Type II and with <a href="/wiki/USB" title="USB">USB</a> interface. </p> <div class="mw-heading mw-heading2"><h2 id="Extended_use_cases">Extended use cases</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=11" title="Edit section: Extended use cases"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Flippy_disks">Flippy disks</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=12" title="Edit section: Flippy disks"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Floppy_disk_variants" title="Special:EditPage/Floppy disk variants">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Floppy+disk+variants%22">"Floppy disk variants"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Floppy+disk+variants%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Floppy+disk+variants%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Floppy+disk+variants%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Floppy+disk+variants%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Floppy+disk+variants%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">October 2012</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p>A flippy disk (sometimes known as a "flippy") is a <a href="/wiki/Double-sided_disk" title="Double-sided disk">double-sided</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">5<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">4</span></span>-inch floppy disk, specially modified so that the two sides can be used independently (but not simultaneously) in single-sided drives. Many commercial publishers of computer software (mainly, relatively small programs like arcade games that could fit on a single-sided floppy disk) distributed their products on flippy disks formatted for two different brands of computer, e.g. <a href="/wiki/TRS-80" title="TRS-80">TRS-80</a> on one side and Apple on the other. <i><a href="/wiki/Compute!" title="Compute!">Compute!</a></i> published an article on the topic in March 1981.<sup id="cite_ref-sieg198103_24-0" class="reference"><a href="#cite_note-sieg198103-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> </p><p>Generally, there are two levels of modifications: </p> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Squareholepunch.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Squareholepunch.jpg/220px-Squareholepunch.jpg" decoding="async" width="220" height="278" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Squareholepunch.jpg/330px-Squareholepunch.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Squareholepunch.jpg/440px-Squareholepunch.jpg 2x" data-file-width="2288" data-file-height="2888" /></a><figcaption>A write-notch puncher for <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1154941027"><span class="frac">5<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">4</span></span>-inch disks</figcaption></figure> <ul><li>For <a href="/wiki/Disk_Operating_System" class="mw-redirect" title="Disk Operating System">Disk Operating Systems</a> that do not use the index hole in the disk to mark the beginnings of tracks, the "flippy" modification required only a new write-enable notch to be cut if the disk was designed to be written to. For this purpose, specially designed single-rectangular-hole punchers, commonly known as <b>disk doublers</b>, were produced and sold by third-party computer accessory manufacturers. Many users, however, made do with a standard (round) hole puncher and/or an ordinary pair of scissors for this job.<figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Spiderman_Flippy_Disk.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/4/45/Spiderman_Flippy_Disk.jpg/220px-Spiderman_Flippy_Disk.jpg" decoding="async" width="220" height="221" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/4/45/Spiderman_Flippy_Disk.jpg 1.5x" data-file-width="315" data-file-height="316" /></a><figcaption>Commercial nonwriteable Flippy disk with no write notches and two jacket index windows</figcaption></figure></li> <li>For disk operating systems that do use index sync, a second index hole window has to be punched in both sides of the jacket, and for hard-sectored formats, an additional window must be punched for the sector holes. While cutting a second notch is relatively safe, cutting an additional window into the jacket is a great peril to the disk itself.</li></ul> <p>A number of floppy-disk manufacturers produced ready-made "flippy" media. As the cost of media went down and double-sided drives became the standard, "flippies" became obsolete. </p> <div class="mw-heading mw-heading3"><h3 id="Auto-loaders">Auto-loaders</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=13" title="Edit section: Auto-loaders"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>IBM developed, and several companies copied, an <a href="/wiki/Autoloader_(data_storage_device)" class="mw-redirect" title="Autoloader (data storage device)">autoloader</a> mechanism that can load a stack of floppies one at a time into a drive. These are very bulky systems, and suffer from media hangups and chew-ups more than standard drives, <sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (October 2007)">citation needed</span></a></i>]</sup> but they were a partial answer to replication and large removable storage needs. The smaller 5¼- and 3½-inch floppies made this a much easier technology to perfect. </p> <div class="mw-heading mw-heading3"><h3 id="Floppy_mass_storage">Floppy mass storage</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=14" title="Edit section: Floppy mass storage"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A number of companies, including IBM and Burroughs, experimented with using large numbers of unenclosed disks to create massive amounts of storage. The Burroughs system uses a stack of 256 12-inch disks, spinning at a high speed.<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> The disk to be accessed is selected by using air jets to part the stack, and then a pair of heads flies over the surface as in some hard disk drives. This approach in some ways anticipated the Bernoulli disk technology implemented in the <a href="/wiki/Iomega" title="Iomega">Iomega</a> <a href="/wiki/Bernoulli_Box" title="Bernoulli Box">Bernoulli Box</a>, but <a href="/wiki/Head_crash" title="Head crash">head crashes</a> or air failures were spectacularly messy. The program did not reach production. </p> <div class="mw-heading mw-heading2"><h2 id="Super_floppy"><span class="anchor" id="Superfloppy"></span>Super floppy</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=15" title="Edit section: Super floppy"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A number of attempts were made by various companies to introduce newer floppy-disk formats, frequently characterized as a <b>"super floppy"</b> with many based on the standard 3½-inch physical format while offering much higher capacity. Most of these systems provide the ability to read and write standard DD and HD disks.<sup id="cite_ref-PCMagEnc_26-0" class="reference"><a href="#cite_note-PCMagEnc-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> None of these ever reached the point where it could be assumed that every current PC would have one, and they have now largely been replaced by <a href="/wiki/Optical_disc" title="Optical disc">optical disc</a> burners and <a href="/wiki/Flash_memory" title="Flash memory">flash storage</a>. Nevertheless, the 5¼- and 3½-inch sizes remain to this day as the standards for <a href="/wiki/Drive_bay" title="Drive bay">drive bays</a> in <a href="/wiki/Computer_case" title="Computer case">computer cases</a>, the former used for optical drives (including <a href="/wiki/Blu-ray_Disc" class="mw-redirect" title="Blu-ray Disc">Blu-ray</a>), and the latter for <a href="/wiki/Hard_disk_drive" title="Hard disk drive">hard disk drives</a>. </p><p>The main technological change for the higher-capacity formats was the addition of tracking information on the disk surface to allow the read/write heads to be positioned more accurately. Normal disks have no such information, so the drives use feedforward (blind) positioning by a stepper motor in order to position their heads over the desired track. For good interoperability of disks among drives, this requires precise alignment of the drive heads to a reference standard, somewhat similar to the alignment required to get the best performance out of an audio tape deck. The newer systems generally use position information on the surfaces of the disk to find the tracks, allowing the track width to be greatly reduced. </p><p>In 1990,<sup id="cite_ref-MB20_27-0" class="reference"><a href="#cite_note-MB20-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> an attempt was made to standardize details for a 20MB 3½-inch format floppy. At the time, "three different technologies that are not interchangeable" existed. One major goal was that the to-be-developed standard drive be <a href="/wiki/Backward_compatibility" title="Backward compatibility">backward compatible</a>: that it be able to read 720 KB and 1.44 MB floppies. </p><p>From a conceptual point of view, superfloppies are treated as unpartitioned media. The entire media forms a single volume.<sup id="cite_ref-Hudek_GPT_28-0" class="reference"><a href="#cite_note-Hudek_GPT-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Floptical">Floptical</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=16" title="Edit section: Floptical"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Floptical" title="Floptical">Floptical</a></div> <p>In 1991, Insite Peripherals introduced the "<a href="/wiki/Floptical" title="Floptical">Floptical</a>", which uses an <a href="/wiki/Infra-red" class="mw-redirect" title="Infra-red">infra-red</a> <a href="/wiki/LED" class="mw-redirect" title="LED">LED</a> to position the heads over marks in the disk surface. The original drive stores 21 MB, while also reading and writing standard DD and HD floppies. In order to improve data transfer speeds and make the high-capacity drive usefully quick as well, the drives are attached to the system using a <a href="/wiki/SCSI" title="SCSI">SCSI</a> connector instead of the normal floppy controller. This meant that most PCs were unable to boot from them. This again adversely affected pickup rates. </p><p>The Insite Floptical is considered to be the first actual super floppy.<sup id="cite_ref-PCMagEnc_26-1" class="reference"><a href="#cite_note-PCMagEnc-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> </p><p>Insite licensed their technology to a number of companies, who introduced compatible devices as well as even larger-capacity formats. The most popular of these, by far, was the LS-120, mentioned below. </p> <div class="mw-heading mw-heading3"><h3 id="Flextra">Flextra</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=17" title="Edit section: Flextra"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>As early as 1987,<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> Brier Technology announced the Flextra BR3020, which boasts 21.4 MB (a value used for marketing: its true size is 21,040 kB, 2 sides × 526 cylinders × 40 sectors × 512 bytes or 25 MB unformatted).<sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> </p><p>Around 1990, it announced the BR3225 drive, which was supposed to double the capacity and also read standard DD, HD and ED 3½-inch disks. However, the drive was still not released in 1992.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> </p><p>It uses 3½-inch standard disk jackets whose disks have low-frequency magnetic servo information embedded on them for use with the Twin-Tier Tracking technology. Media were manufactured by Verbatim. Quantum sold the drives under the QuadFlextra name. </p> <div class="mw-heading mw-heading3"><h3 id="Zip_drive">Zip drive</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=18" title="Edit section: Zip drive"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Zip_drive" title="Zip drive">Zip drive</a></div> <p>In 1994, <a href="/wiki/Iomega" title="Iomega">Iomega</a> introduced the <a href="/wiki/Zip_drive" title="Zip drive">Zip drive</a>. Although neither size (the original or the later Pocket Zip drive) conforms to the 3½-inch form factor and hence is not compatible with standard 1.44 MB drives, the original physical size still became the most popular of the "super floppies". The first version boasted <a href="/wiki/ZIP-100" class="mw-redirect" title="ZIP-100">100 MB</a>; later versions boasted <a href="/wiki/ZIP-250" class="mw-redirect" title="ZIP-250">250 MB</a> and then <a href="/wiki/ZIP-750" class="mw-redirect" title="ZIP-750">750 MB</a> of storage, until the <a href="/wiki/PocketZip" title="PocketZip">PocketZip</a> (formerly known as <a href="/wiki/Clik!" class="mw-redirect" title="Clik!">Clik!</a>) was developed with 40 MB. Though Zip drives gained in popularity for several years they never reached the same market penetration as standard floppy drives, since only some new computers were sold with the drives. </p><p>The rise of <a href="/wiki/Desktop_publishing" title="Desktop publishing">desktop publishing</a> and <a href="/wiki/Computer_graphics" title="Computer graphics">computer graphics</a> led to much larger file sizes. Zip disks greatly eased the exchange of files that were too big to fit on a standard 3.5-inch floppy or an email attachment, when there was no high-speed connection to transfer the file to the recipient. Eventually the falling prices of <a href="/wiki/Compact_disc" title="Compact disc">compact disc</a> optical media and, later, <a href="/wiki/Flash_memory" title="Flash memory">flash storage</a>, along with notorious hardware failures (the so-called "<a href="/wiki/Click_of_death" title="Click of death">click of death</a>"), reduced the popularity of the Zip drive. </p> <div class="mw-heading mw-heading3"><h3 id="LS-120/LS-240"><span id="LS-120.2FLS-240"></span>LS-120/LS-240</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=19" title="Edit section: LS-120/LS-240"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/SuperDisk" title="SuperDisk">SuperDisk</a></div> <p>Announced in 1995, the "<a href="/wiki/SuperDisk" title="SuperDisk">SuperDisk</a>" marketed as the <a href="/wiki/LS-120" class="mw-redirect" title="LS-120">LS-120</a> drive, often seen with the brand names <a href="/wiki/Matsushita_Electric_Industrial" class="mw-redirect" title="Matsushita Electric Industrial">Matsushita</a> (Panasonic) and <a href="/wiki/Imation" class="mw-redirect" title="Imation">Imation</a>, had an initial capacity of 120 MB (120.375 <a href="/wiki/Megabyte" title="Megabyte">MB</a>).<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> </p><p>LS in this case stands for LASER-servo,<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> which uses a very low-power superluminescent LED that generates light with a small focal spot. This allows the drive to align its rotation to precisely the same point each time, allowing far more data to be written due to the absence of conventional magnetic alignment marks. The alignment is based on hard-coded optical alignment marks, which meant that a complete format can safely be done. This worked very well at the time and as a result failures associated with magnetic fields wiping the Zip drive alignment Z tracks were less of a problem. It was also able to read and write to standard floppy disks about 5 times as fast as standard floppy drives. </p><p>It was upgraded (as the "<a href="/wiki/LS-240" class="mw-redirect" title="LS-240">LS-240</a>") to 240 MB (240.75 MB). Not only can the drive read and write 1,440 kB disks, but the last versions of the drives can write <a href="/wiki/FD32MB" class="mw-redirect" title="FD32MB">32 MB</a> onto a normal 1,440 kB disk. Unfortunately, popular opinion held the Super Disks to be quite unreliable,<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (April 2010)">citation needed</span></a></i>]</sup> though no more so than the <a href="/wiki/Zip_drive" title="Zip drive">Zip drives</a> and <a href="/wiki/SyQuest_Technology" title="SyQuest Technology">SyQuest Technology</a> offerings of the same period and there were also many reported problems moving standard floppies between LS-120 drives and normal floppy drives.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (April 2010)">citation needed</span></a></i>]</sup> This belief, true or otherwise, crippled adoption. The <a href="/wiki/BIOS" title="BIOS">BIOS</a> of many motherboards even to this day supports LS-120 drives as a boot option. </p><p>LS-120 drives were available as options on many computers, including desktop and notebook computers from <a href="/wiki/Compaq" title="Compaq">Compaq Computer Corporation</a>. In the case of the Compaq notebooks, the LS-120 drive replaced the standard floppy drive in a multibay configuration. </p> <div class="mw-heading mw-heading3"><h3 id="Sony_HiFD">Sony HiFD</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=20" title="Edit section: Sony HiFD"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Sony_HiFD" title="Sony HiFD">Sony HiFD</a></div> <p>Sony introduced its own floptical-like system in 1997 as the "150 MB <a href="/wiki/Sony_HiFD" title="Sony HiFD">Sony HiFD</a>" which was originally supposed to hold 150 MB (157.3 decimal megabytes) of data. Although by this time the LS-120 had already garnered some market penetration, industry observers nevertheless confidently predicted the HiFD would be the real standard-floppy-killer and finally replace standard floppies in all machines. </p><p>After only a short time on the market the product was pulled, as it was discovered there were a number of performance- and reliability problems that made the system essentially unusable. Sony then reengineered the device for a quick rerelease, but then extended the delay well into 1998 instead, and increased the capacity to "200 MB" (approximately 210 decimal megabytes) while they were at it. By this point the market was already saturated by the Zip disk, so it never gained much market share. </p> <div class="mw-heading mw-heading3"><h3 id="Caleb_Technology’s_UHD144"><span id="Caleb_Technology.E2.80.99s_UHD144"></span>Caleb Technology’s UHD144</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=21" title="Edit section: Caleb Technology’s UHD144"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Caleb_UHD144" title="Caleb UHD144">Caleb UHD144</a></div> <p>The <a href="/wiki/Caleb_UHD144" title="Caleb UHD144">UHD144</a> drive surfaced early in 1998 as the <i>it</i> drive, and provides 144 MB of storage while also being compatible with the standard 1.44 MB floppies. The drive was slower than its competitors but the media was cheaper, running about US$8 at introduction and US$5 soon after. </p> <div class="mw-heading mw-heading2"><h2 id="Custom_formatting_types_on_3½-inch_and_5¼-inch_media"><span id="Custom_formatting_types_on_3.C2.BD-inch_and_5.C2.BC-inch_media"></span>Custom formatting types on 3½-inch and 5¼-inch media</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=22" title="Edit section: Custom formatting types on 3½-inch and 5¼-inch media"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Commodore_64/128"><span id="Commodore_64.2F128"></span>Commodore 64/128</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=23" title="Edit section: Commodore 64/128"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Commodore started its tradition of special disk formats with the 5¼-inch disk drives accompanying its <a href="/wiki/Commodore_PET" title="Commodore PET">PET/CBM</a>, <a href="/wiki/VIC-20" title="VIC-20">VIC-20</a>, and <a href="/wiki/Commodore_64" title="Commodore 64">Commodore 64</a> home computers, the same as the <a href="/wiki/Commodore_1540" title="Commodore 1540">1540</a> and <a href="/wiki/Commodore_1541" title="Commodore 1541">1541</a> drives used with the later two machines. The standard Commodore <a href="/wiki/Group_Coded_Recording" class="mw-redirect" title="Group Coded Recording">Group Coded Recording</a> (GCR) scheme used in 1541 and compatibles employed four different data rates depending upon track position (see <i><a href="/wiki/Zone_bit_recording" title="Zone bit recording">zone bit recording</a></i>). Tracks 1 to 17 had 21 sectors, 18 to 24 had 19, 25 to 30 had 18, and 31 to 35 had 17, for a disk capacity of 170.75 KB (175 decimal kB). Unique among personal computer architectures, the operating system on the computer itself is unaware of the details of the disk and filesystem; disk operations are handled by <a href="/wiki/Commodore_DOS" title="Commodore DOS">Commodore DOS</a> instead, which was implemented with an extra <a href="/wiki/MOS_Technology_6502" title="MOS Technology 6502">MOS-6502</a> processor on the disk drive. Many programs such as <a href="/wiki/GEOS_(8-bit_operating_system)" title="GEOS (8-bit operating system)">GEOS</a> bypass Commodore's DOS completely, and replace it with fast-loading (for the time) programs in the 1541 drive. </p><p>Eventually Commodore gave in to disk format standardization, and made its last 5¼-inch drives, the <a href="/wiki/Commodore_1570" title="Commodore 1570">1570</a> and <a href="/wiki/Commodore_1571" title="Commodore 1571">1571</a>, compatible with <a href="/wiki/Modified_Frequency_Modulation" class="mw-redirect" title="Modified Frequency Modulation">Modified Frequency Modulation</a> (MFM), to enable the <a href="/wiki/Commodore_128" title="Commodore 128">Commodore 128</a> to work with <a href="/wiki/CP/M" title="CP/M">CP/M</a> disks from several vendors. Equipped with one of these drives, the C128 is able to access both C64 and CP/M disks, as it needs to, as well as MS-DOS disks (using third-party software), which was a crucial feature for some office work. At least one commercial program, <i>Big Blue Reader</i> by <a href="/w/index.php?title=SOGWAP&action=edit&redlink=1" class="new" title="SOGWAP (page does not exist)">SOGWAP</a> software was available to perform the task. </p><p>Commodore also developed a 3½-inch 800 KB disk format for its <a href="/wiki/8-bit" class="mw-redirect" title="8-bit">8-bit</a> machines with the <a href="/wiki/Commodore_1581" title="Commodore 1581">1581</a> disk drive, which uses only MFM. </p><p>The <a href="/wiki/GEOS_(8-bit_operating_system)" title="GEOS (8-bit operating system)">GEOS operating system</a> uses a disk format that is largely identical to the Commodore DOS format with a few minor extensions; while generally compatible with standard Commodore disks, certain disk maintenance operations can corrupt the filesystem without proper supervision from the GEOS kernel. </p> <div class="mw-heading mw-heading3"><h3 id="Atari_8-bit_line">Atari 8-bit line</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=24" title="Edit section: Atari 8-bit line"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The combination of DOS and hardware (810, 1050 and XF551 disk drives) for Atari 8-bit floppy usage allows sectors numbered from 1 to 720 (1040 in the 1050 disk drive, 1440 in XF551). For instance, the DOS's 2.0 disk bitmap provides information on sector allocation, counts from 0 to 719. As a result, sector 720 cannot be written to by the DOS. Some companies used a copy-protection scheme where hidden data was put in sector 720 that cannot be copied through the DOS copy option. Another more-common early copy-protected scheme simply does not record important sectors as allocated in the VTOC, so the DOS Utility Package (DUP) does not duplicate them. All of these early techniques were thwarted by the first program that simply duplicated all sectors. </p><p>Later DOS versions (3.0 and later 2.5) and DOSes by third parties (i.e. OSS) accept (and format) disks with up to 1040 sectors, resulting in 130 KB of storage capacity per disk side on drives equipped with double-density controllers (<i>i.e</i>. not the Atari 810) vs. previous 90 KB. That unusual 130 KB format and was introduced by Atari with the 1050 drive with the introduction of DOS 3.0 in 1983. </p><p>A true double-density Atari floppy format (from 180 KB upwards) uses 128-byte sectors for sectors 1-3, then 256-byte sectors for the rest. The first three sectors typically contain boot code as used by the onboard ROM OS; it is up to the resulting boot program (such as SpartaDOS) to recognize the density of the formatted disk structure. While this format was developed by Atari for their DOS 2.0D and their (canceled) 180 KB Atari 815 floppy drive, that double-density DOS was never widely released and the format was generally used by third-party DOS products. Under the Atari DOS II scheme, sector 360 is the VTOC sector map, and sectors 361-367 contain the file listing. The Atari-brand DOS II versions and compatible use three bytes per sector for housekeeping and to link-list to the next sector. </p><p>Later, mostly third-party DOS systems added features such as double-sided drives, subdirectories, and drive types such as 720 KB, 1.2 MB, 1.44 MB. Well-known 3rd party Atari DOS products include SmartDOS (distributed with the Rana disk drive), TopDos, MyDos and SpartaDOS. </p> <div class="mw-heading mw-heading3"><h3 id="Amiga">Amiga</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=25" title="Edit section: Amiga"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Amiga_Custom_Chip_Paula_8364.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/53/Amiga_Custom_Chip_Paula_8364.jpg/220px-Amiga_Custom_Chip_Paula_8364.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/53/Amiga_Custom_Chip_Paula_8364.jpg/330px-Amiga_Custom_Chip_Paula_8364.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/53/Amiga_Custom_Chip_Paula_8364.jpg/440px-Amiga_Custom_Chip_Paula_8364.jpg 2x" data-file-width="1280" data-file-height="960" /></a><figcaption>The pictured chip, codenamed <i><a href="/wiki/Original_Amiga_chipset#Paula" class="mw-redirect" title="Original Amiga chipset">Paula</a></i>, controls floppy access on all revisions of the Commodore Amiga as one of its many functions</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><span><audio id="mwe_player_1" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="220" style="width:220px;" data-durationhint="94" data-mwtitle="Amiga_2000_loading_Lotus_Turbo_Challenge_2_from_floppy_disk.flac" data-mwprovider="wikimediacommons" resource="/wiki/File:Amiga_2000_loading_Lotus_Turbo_Challenge_2_from_floppy_disk.flac"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/0/05/Amiga_2000_loading_Lotus_Turbo_Challenge_2_from_floppy_disk.flac/Amiga_2000_loading_Lotus_Turbo_Challenge_2_from_floppy_disk.flac.ogg" type="audio/ogg; codecs="vorbis"" data-transcodekey="ogg" data-width="0" data-height="0" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/0/05/Amiga_2000_loading_Lotus_Turbo_Challenge_2_from_floppy_disk.flac/Amiga_2000_loading_Lotus_Turbo_Challenge_2_from_floppy_disk.flac.mp3" type="audio/mpeg" data-transcodekey="mp3" data-width="0" data-height="0" /><source src="//upload.wikimedia.org/wikipedia/commons/0/05/Amiga_2000_loading_Lotus_Turbo_Challenge_2_from_floppy_disk.flac" type="audio/flac" data-width="0" data-height="0" /><track src="https://commons.wikimedia.org/w/api.php?action=timedtext&title=File%3AAmiga_2000_loading_Lotus_Turbo_Challenge_2_from_floppy_disk.flac&lang=en&trackformat=vtt&origin=%2A" kind="subtitles" type="text/vtt" srclang="en" label="English ‪(en)‬" data-dir="ltr" /></audio></span><figcaption>An <a href="/wiki/Amiga_2000" title="Amiga 2000">Amiga 2000</a> loading <i><a href="/wiki/Lotus_Turbo_Challenge_2" class="mw-redirect" title="Lotus Turbo Challenge 2">Lotus Turbo Challenge 2</a></i> which uses a custom disk format, resulting in some unusual sounds. The Amiga's empty drive clicking can also be heard at the beginning.</figcaption></figure> <p>The <a href="/wiki/Amiga" title="Amiga">Amiga</a> computers use an 880 KB format (11×512-byte sectors per track, times 80 tracks, times two sides) on a 3½-inch floppy. Because the entire track is written at once, intersector gaps can be eliminated, saving space. The Amiga floppy controller is much more flexible than the one on the PC: it is free of arbitrary format restrictions, encoding such as <a href="/wiki/Modified_Frequency_Modulation" class="mw-redirect" title="Modified Frequency Modulation">MFM</a> and <a href="/wiki/Group_coded_recording" title="Group coded recording">GCR</a> can be done in software, and developers were able to create their own <a href="/wiki/Proprietary_format" class="mw-redirect" title="Proprietary format">proprietary</a> disk formats. Because of this, foreign formats such as the <a href="/wiki/IBM_PC_compatible" class="mw-redirect" title="IBM PC compatible">IBM PC compatible</a>'s can be handled with ease (by use of <a href="/wiki/CrossDOS" title="CrossDOS">CrossDOS</a>, which was included with later versions of <a href="/wiki/AmigaOS" title="AmigaOS">AmigaOS</a>). With the correct filesystem <a href="/wiki/Device_driver" title="Device driver">driver</a>, an Amiga can theoretically read any arbitrary format on the 3½-inch floppy, including those recorded at a slightly different rotation rate. On the PC, however, there is no way to read an Amiga disk without special hardware, such as an <a href="/wiki/Individual_Computers_Catweasel" title="Individual Computers Catweasel">Individual Computers Catweasel</a>, and a second floppy drive.<sup id="cite_ref-oldskool-disk2fdi_35-0" class="reference"><a href="#cite_note-oldskool-disk2fdi-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> Another alternative to read Amiga disk is open source and open hardware project Greaseweazle. It is simple STM32 based USB to FD interface adapter capable of reading magnetic flux image. With proper software, it is possible to read and write Amiga and almost any other floppy disk. </p><p>Commodore never upgraded the <a href="/wiki/Original_Chip_Set" class="mw-redirect" title="Original Chip Set">Original Chip Set</a> to support high-density floppies, but sold a custom drive (made by Chinon) that spins at half speed (150 <a href="/wiki/Revolutions_per_minute" title="Revolutions per minute">RPM</a>) when a high-density floppy was inserted, enabling the existing floppy controller to be used. This drive was built into the <a href="/wiki/Amiga_3000" title="Amiga 3000">Amiga 3000</a> and <a href="/wiki/Amiga_4000" title="Amiga 4000">Amiga 4000</a>, although the later <a href="/wiki/Amiga_1200" title="Amiga 1200">Amiga 1200</a> was only fitted with the standard <a href="/wiki/Double_density" class="mw-redirect" title="Double density">DD</a> drive. The Amiga HD disks can handle 1760 KB, but using special software programs they can hold even more data. A company named Kolff Computer Supplies also made an external HD floppy drive (KCS Dual HD Drive) available which can handle HD format diskettes on all Amiga computer systems.<sup id="cite_ref-amihw-kcs2xhd_36-0" class="reference"><a href="#cite_note-amihw-kcs2xhd-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> </p><p>Because of storage reasons, the use of emulators and preserving data, many disks were packed into disk images. Currently popular formats are <code>.ADF</code> (<a href="/wiki/Amiga_Disk_File" title="Amiga Disk File">Amiga Disk File</a>), <code>.DMS</code> (<a href="/wiki/Disk_Masher_System" title="Disk Masher System">DiskMasher</a>) and <code>.IPF</code> (<a href="/wiki/Interchangeable_Preservation_Format" class="mw-redirect" title="Interchangeable Preservation Format">Interchangeable Preservation Format</a>) files. The DiskMasher format is copy-protected and has problems storing particular sequences of bits due to bugs in the compression algorithm, but was widely used in the pirate and demo scenes. <a href="/wiki/Amiga_Disk_File" title="Amiga Disk File">ADF</a> has been around for almost as long as the Amiga itself though it was not initially called by that name. Only with the advent of the internet and Amiga emulators has it become a popular way of distributing disk images. The proprietary IPF files were created to allow preservation of commercial games which have <a href="/wiki/Copy_protection#Early_video_games" title="Copy protection">copy protection</a>, which is something that ADF and DMS cannot do. </p> <div class="mw-heading mw-heading3"><h3 id="Acorn_Electron,_BBC_Micro,_and_Archimedes"><span id="Acorn_Electron.2C_BBC_Micro.2C_and_Archimedes"></span>Acorn Electron, BBC Micro, and Archimedes</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=26" title="Edit section: Acorn Electron, BBC Micro, and Archimedes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The British company <a href="/wiki/Acorn_Computers" title="Acorn Computers">Acorn Computers</a> used non-standard disk formats in their 8-bit <a href="/wiki/BBC_Micro" title="BBC Micro">BBC Micro</a> and <a href="/wiki/Acorn_Electron" title="Acorn Electron">Acorn Electron</a>, and their successor the <a href="/wiki/32-bit" class="mw-redirect" title="32-bit">32-bit</a> <a href="/wiki/Acorn_Archimedes" title="Acorn Archimedes">Acorn Archimedes</a>. Acorn however, used standard disk controllers: initially FM, though they quickly transitioned to MFM. The original disk implementation for the BBC Micro stores 100 KB (40 track) or 200 KB (80 track) per side on 5¼-inch disks in a custom format using the <a href="/wiki/Disc_Filing_System" title="Disc Filing System">Disc Filing System</a> (DFS). </p><p>Due to the incompatibility between 40- and 80-track drives, much software was distributed on combined 40/80-track disks. These work by writing the same data in pairs of consecutive tracks in 80-track format, and including a small loader program on track 1 (which is in the same physical position in either format). The loader program detects which type of drive is in use, and loads the main software program straight from disk bypassing the DFS, double-stepping for 80-track drives and single-stepping for 40-track. This effectively achieves downgraded capacity to 100 KB from either disk format, but enabled distributed software to be effectively compatible with either drive. </p><p>For their Electron floppy-disk add-on, Acorn chose 3½-inch disks and developed the <a href="/wiki/Advanced_Disk_Filing_System" class="mw-redirect" title="Advanced Disk Filing System">Advanced Disk Filing System</a> (ADFS). It uses double-density recording and adds the ability to treat both sides of the disk as a single disk. This offers three formats: </p> <ul><li>S (small): 160 KB, 40-track single-sided;</li> <li>M (medium): 320 KB, 80-track single-sided;</li> <li>L (large): 640 KB, 80-track double-sided.</li></ul> <p>ADFS provides hierarchical directory structure, rather than the flat model of DFS. ADFS also stores some metadata about each file, notably a load address, an execution address, owner and public privileges, and a lock bit. Even on the eight-bit machines, load addresses are stored in 32-bit format, since those machines support <a href="/wiki/16-bit" class="mw-redirect" title="16-bit">16-</a> and 32-bit <a href="/wiki/Coprocessor" title="Coprocessor">coprocessors</a>. </p><p>The ADFS format was later adopted into the BBC line upon release of the <a href="/wiki/BBC_Master" title="BBC Master">BBC Master</a>. The BBC Master Compact marked the move to 3½-inch disks, using the same ADFS formats. </p><p>The Acorn Archimedes adds D format, which increases the number of objects per directory from 44 to 77 and increases the storage space to 800 KB. The extra space is obtained by using 1024 byte sectors instead of the usual 512 bytes, thus reducing the space needed for inter-sector gaps. As a further enhancement, successive tracks are offset by a sector, giving time for the head to advance to the next track without missing the first sector, thus increasing bulk throughput. The Archimedes uses special values in the ADFS load/execute address metadata to store a 12-bit filetype field and a 40-bit timestamp. </p><p><a href="/wiki/RISC_OS" title="RISC OS">RISC OS</a> 2 introduces E format, which retains the same physical layout as D format, but supports file fragmentation and auto-compaction. Post-1991 machines including the A5000 and <a href="/wiki/Risc_PC" title="Risc PC">Risc PC</a> add support for high-density disks with F format, storing 1,600 KB. However, the PC <a href="/wiki/Super_I/O" title="Super I/O">combo IO</a> chips used are unable to format disks with sector skew, losing some performance. ADFS and the PC controllers also support extra-high density (ED) disks as G format, storing 3,200 KB, but ED drives were never fitted to production machines. </p><p>With RISC OS 3, the Archimedes can also read and write disk formats from other machines (for example the Atari ST and the IBM PC, which are largely compatible depending on the ST's OS version). With third-party software it can even read the BBC Micro's original single-density 5¼-inch DFS disks. The Amiga's disks cannot be read by this system as they omitted the usual sector gap markers. </p><p>The Acorn filesystem design is interesting to some people because all ADFS-based storage devices connect to a module called <a href="/w/index.php?title=FileCore&action=edit&redlink=1" class="new" title="FileCore (page does not exist)">FileCore</a> which provides almost all the features required to implement an ADFS-compatible filesystem. Because of this modular design, it is easy in RISC OS 3 to add support for so-called <a href="/w/index.php?title=Image_filing_systems&action=edit&redlink=1" class="new" title="Image filing systems (page does not exist)">image filing systems</a>. These are used to implement completely transparent support for IBM PC format floppy disks, including the slightly different <a href="/wiki/Atari_ST" title="Atari ST">Atari ST</a> format. <a href="/wiki/Xara" title="Xara">Computer Concepts</a> released a package that implements an image filing system to allow access to high density <a href="/wiki/Macintosh" class="mw-redirect" title="Macintosh">Macintosh</a> format disks. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=27" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Dd_(Unix)" title="Dd (Unix)">dd (Unix)</a></li> <li><a href="/wiki/Disk_image" title="Disk image">Disk image</a></li> <li><a href="/wiki/Disk_storage" title="Disk storage">Disk storage</a></li> <li><a href="/wiki/Don%27t_Copy_That_Floppy" title="Don't Copy That Floppy">Don't Copy That Floppy</a></li> <li><a href="/wiki/Floppy_disk_controller" class="mw-redirect" title="Floppy disk controller">Floppy disk controller</a></li> <li><a href="/wiki/Floppy_disk_format" title="Floppy disk format">Floppy disk format</a></li> <li><a href="/wiki/Floppy_disk_hardware_emulator" title="Floppy disk hardware emulator">Floppy disk hardware emulator</a></li> <li><a href="/wiki/Group_coded_recording" title="Group coded recording">Group coded recording</a></li> <li><a href="/wiki/History_of_the_floppy_disk" title="History of the floppy disk">History of the floppy disk</a></li> <li><a href="/wiki/List_of_floppy_disk_formats" title="List of floppy disk formats">List of floppy disk formats</a></li> <li><a href="/wiki/Sneakernet" title="Sneakernet">Sneakernet</a></li> <li><a href="/wiki/3mode" class="mw-redirect" title="3mode">3mode</a> (1.2 MB format on 3.5-inch media)</li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=28" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-Fletcher_2007-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Fletcher_2007_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFFletcher2007" class="citation news cs1">Fletcher, Richard (2007-01-30). <a rel="nofollow" class="external text" href="https://www.telegraph.co.uk/finance/2803487/PC-World-announces-the-end-of-the-floppy-disk.html">"PC World announces the end of the floppy disk"</a>. London: The Telegraph<span class="reference-accessdate">. Retrieved <span class="nowrap">2011-06-22</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=PC+World+announces+the+end+of+the+floppy+disk&rft.date=2007-01-30&rft.aulast=Fletcher&rft.aufirst=Richard&rft_id=https%3A%2F%2Fwww.telegraph.co.uk%2Ffinance%2F2803487%2FPC-World-announces-the-end-of-the-floppy-disk.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text">1983 Disk/Trend Report - Flexible Disk Drives, December 1983 p. MFGR-7</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=RAe4jAHXAgwC&pg=PA66">"Computerworld"</a>. March 1983.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Computerworld&rft.date=1983-03&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DRAe4jAHXAgwC%26pg%3DPA66&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=ja8HagveLRQC&pg=PA107">"Popular Science"</a>. October 1986.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Popular+Science&rft.date=1986-10&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3Dja8HagveLRQC%26pg%3DPA107&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.computerwoche.de/a/tabor-bringt-drivette-auf-den-markt,1178051">"Tabor bringt Drivette auf den Markt"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Tabor+bringt+Drivette+auf+den+Markt&rft_id=https%3A%2F%2Fwww.computerwoche.de%2Fa%2Ftabor-bringt-drivette-auf-den-markt%2C1178051&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.worthpoint.com/worthopedia/historic-tabor-floppy-disc-drive-219855797">"Historic "Tabor" Floppy Disc Drive | #219855797"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Historic+%22Tabor%22+Floppy+Disc+Drive+%26%23124%3B+%23219855797&rft_id=https%3A%2F%2Fwww.worthpoint.com%2Fworthopedia%2Fhistoric-tabor-floppy-disc-drive-219855797&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-Foone_2018-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-Foone_2018_7-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFoone2018" class="citation web cs1">@Foone (2018-04-30). <a rel="nofollow" class="external text" href="https://x.com/Foone/status/991064038611173376">"Why does this drive exist?"</a> (<a href="/wiki/Tweet_(social_media)" title="Tweet (social media)">Tweet</a>). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20201109142152/https://twitter.com/Foone/status/991064038611173376">Archived</a> from the original on 2020-11-09<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-01-09</span></span> – via <a href="/wiki/Twitter" title="Twitter">Twitter</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Why+does+this+drive+exist%3F&rft.date=2018-04-30&rft.au=Foone&rft_id=https%3A%2F%2Fx.com%2FFoone%2Fstatus%2F991064038611173376&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20220109153640/https://68kmla.org/bb/index.php?threads%2Ftabor-tc500-drivette-woohoo.24895%2F">"Tabor TC500 Drivette! Woohoo! | 68kMLA"</a>. <i>68kmla.org</i>. Archived from <a rel="nofollow" class="external text" href="https://68kmla.org/bb/index.php?threads%2Ftabor-tc500-drivette-woohoo.24895%2F">the original</a> on 2022-01-09<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-01-12</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=68kmla.org&rft.atitle=Tabor+TC500+Drivette%21+Woohoo%21+%26%23124%3B+68kMLA&rft_id=https%3A%2F%2F68kmla.org%2Fbb%2Findex.php%3Fthreads%252Ftabor-tc500-drivette-woohoo.24895%252F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-Foone_2020-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-Foone_2020_9-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFoone2020" class="citation web cs1">@Foone (2020-10-13). <a rel="nofollow" class="external text" href="https://x.com/Foone/status/1316008729045684224">"The floppy is a 3.25" Flex Diskette"</a> (<a href="/wiki/Tweet_(social_media)" title="Tweet (social media)">Tweet</a>). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20201109011615/https://twitter.com/Foone/status/1316008729045684224">Archived</a> from the original on 2020-11-09<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-01-09</span></span> – via <a href="/wiki/Twitter" title="Twitter">Twitter</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=The+floppy+is+a+3.25%22+Flex+Diskette&rft.date=2020-10-13&rft.au=Foone&rft_id=https%3A%2F%2Fx.com%2FFoone%2Fstatus%2F1316008729045684224&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-BYTE_1984-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-BYTE_1984_10-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation magazine cs1">"Tabor Adds 3½-inch Drive". <i><a href="/wiki/BYTE_(magazine)" class="mw-redirect" title="BYTE (magazine)">BYTE</a></i>. October 1984.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=BYTE&rft.atitle=Tabor+Adds+3%C2%BD-inch+Drive&rft.date=1984-10&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://ajovomultja.hu/mcd-1-casette-floppy-marcell-janosi?language=en">"MCD-1 cassette floppy drive"</a>. Informatika Történeti Kiállítás. 2016-08-30. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230207212332/https://ajovomultja.hu/mcd-1-casette-floppy-marcell-janosi?language=en">Archived</a> from the original on 2023-02-07<span class="reference-accessdate">. Retrieved <span class="nowrap">2023-05-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=MCD-1+cassette+floppy+drive&rft.pub=Informatika+T%C3%B6rt%C3%A9neti+Ki%C3%A1ll%C3%ADt%C3%A1s&rft.date=2016-08-30&rft_id=https%3A%2F%2Fajovomultja.hu%2Fmcd-1-casette-floppy-marcell-janosi%3Flanguage%3Den&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJánosi1974" class="citation web cs1">Jánosi, Jánosi Marcell (1974-11-30). <a rel="nofollow" class="external text" href="https://patents.google.com/patent/HU170790B/en?inventor=Marcell+Janosi">"Patent: Casket type storing system for rotating flexible disk"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Patent%3A+Casket+type+storing+system+for+rotating+flexible+disk&rft.date=1974-11-30&rft.aulast=J%C3%A1nosi&rft.aufirst=J%C3%A1nosi+Marcell&rft_id=https%3A%2F%2Fpatents.google.com%2Fpatent%2FHU170790B%2Fen%3Finventor%3DMarcell%2BJanosi&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-MCD-1_1-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-MCD-1_1_13-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.inventingeurope.eu/knowledge/floppy-contradictions&object">"BRG MCD-1, Hungarian floppy disk drive"</a>. <i>Inventing Europe - European Digital Museum for Science & Technology</i>. 2017. <a rel="nofollow" class="external text" href="https://archive.today/20190813221519/http://www.inventingeurope.eu/knowledge/floppy-contradictions&object">Archived</a> from the original on 2019-08-13<span class="reference-accessdate">. Retrieved <span class="nowrap">2019-08-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Inventing+Europe+-+European+Digital+Museum+for+Science+%26+Technology&rft.atitle=BRG+MCD-1%2C+Hungarian+floppy+disk+drive.&rft.date=2017&rft_id=http%3A%2F%2Fwww.inventingeurope.eu%2Fknowledge%2Ffloppy-contradictions%26object&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-MCD-1_2-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-MCD-1_2_14-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1 cs1-prop-foreign-lang-source"><a rel="nofollow" class="external text" href="https://itf.njszt.hu/termek_hardware/brg-mcd-1-kazettas-hajlekonylemez">"BRG MCD-1 kazettás hajlékonylemez"</a>. <i>ITF, NJSZT Informatikatörténeti Fórum</i> (in Hungarian). 2018-10-17 [2015-09-16]. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20190801184355/https://itf.njszt.hu/termek_hardware/brg-mcd-1-kazettas-hajlekonylemez">Archived</a> from the original on 2019-08-01<span class="reference-accessdate">. Retrieved <span class="nowrap">2019-08-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=ITF%2C+NJSZT+Informatikat%C3%B6rt%C3%A9neti+F%C3%B3rum&rft.atitle=BRG+MCD-1+kazett%C3%A1s+hajl%C3%A9konylemez&rft.date=2018-10-17&rft_id=https%3A%2F%2Fitf.njszt.hu%2Ftermek_hardware%2Fbrg-mcd-1-kazettas-hajlekonylemez&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-MCD-1_3-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-MCD-1_3_15-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://brg.8bit.hu/html/mcd1/MCD-1%20Technical%20manual.pdf">"Model MCD-1 - Micro Cassette Disk Drive - Technical manual"</a> <span class="cs1-format">(PDF)</span>. Budapesti Rádiótechnikai Gyár (BRG). 3B50-703/-A. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160301085423/http://brg.8bit.hu/html/mcd1/MCD-1%20Technical%20manual.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2016-03-01<span class="reference-accessdate">. Retrieved <span class="nowrap">2019-08-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Model+MCD-1+-+Micro+Cassette+Disk+Drive+-+Technical+manual&rft.pub=Budapesti+R%C3%A1di%C3%B3technikai+Gy%C3%A1r+%28BRG%29&rft_id=http%3A%2F%2Fbrg.8bit.hu%2Fhtml%2Fmcd1%2FMCD-1%2520Technical%2520manual.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span> (NB. Exported by METRIMPEX Hungarian Trading Company for Instruments.)</span> </li> <li id="cite_note-MCD-1_4-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-MCD-1_4_16-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation magazine cs1 cs1-prop-foreign-lang-source"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20080224140617/http://www.epiteszethonapja.hu/index.php?pa=index&sess=&lan=0&kat=105&cik=4670">"Jánosi Marcell: MCD-1 floppy drive és disk, 1974-1981"</a>. <i>Octogon</i> (in Hungarian). Archived from <a rel="nofollow" class="external text" href="http://www.epiteszethonapja.hu/index.php?pa=index&sess=&lan=0&kat=105&cik=4670">the original</a> on 2008-02-24<span class="reference-accessdate">. Retrieved <span class="nowrap">2006-12-28</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Octogon&rft.atitle=J%C3%A1nosi+Marcell%3A+MCD-1+floppy+drive+%C3%A9s+disk%2C+1974-1981&rft_id=http%3A%2F%2Fwww.epiteszethonapja.hu%2Findex.php%3Fpa%3Dindex%26sess%3D%26lan%3D0%26kat%3D105%26cik%3D4670&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-17">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPorter1985" class="citation book cs1">Porter, James (December 1985). <i>Flexible Disk Drives</i>. Disk/Trend Inc. p. MFGR-23.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Flexible+Disk+Drives&rft.pages=MFGR-23&rft.pub=Disk%2FTrend+Inc.&rft.date=1985-12&rft.aulast=Porter&rft.aufirst=James&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-cpcwiki-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-cpcwiki_18-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20180812115410/http://www.cpcwiki.eu/index.php/CF2_Compact_Floppy_Disc#Pictures">"Pictures [of various CF2 floppy disks]"</a>. Archived from <a rel="nofollow" class="external text" href="http://www.cpcwiki.eu/index.php?title=CF2_Compact_Floppy_Disc&oldid=100163#Pictures">the original</a> on 2018-08-12<span class="reference-accessdate">. Retrieved <span class="nowrap">2018-08-15</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Pictures+%5Bof+various+CF2+floppy+disks%5D&rft_id=http%3A%2F%2Fwww.cpcwiki.eu%2Findex.php%3Ftitle%3DCF2_Compact_Floppy_Disc%26oldid%3D100163%23Pictures&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-pcmag_cf-19"><span class="mw-cite-backlink">^ <a href="#cite_ref-pcmag_cf_19-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-pcmag_cf_19-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-pcmag_cf_19-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20170628023938/https://www.pcmag.com/feature/262600/10-bizarre-pc-storage-formats-that-didn-t-quite-cut-it/4">"10 Bizarre PC Storage Formats That Didn't Quite Cut It: 4: 3-Inch Compact Floppy"</a>. PC Magazine. 2017-06-21. Archived from <a rel="nofollow" class="external text" href="https://www.pcmag.com/feature/262600/10-bizarre-pc-storage-formats-that-didn-t-quite-cut-it/4">the original</a> on 2017-06-28<span class="reference-accessdate">. Retrieved <span class="nowrap">2018-08-15</span></span>. <q>A consortium of manufacturers led by <a href="/wiki/Matsushita_Electric_Industrial" class="mw-redirect" title="Matsushita Electric Industrial">Matsushita</a> introduced this 3-inch-wide Compact Floppy format in 1983 to compete with Sony's 3.5-inch floppy system. The Compact Floppy, which held about 140KB per side, saw the most use in British Amstrad computers; otherwise, the format faded quickly into history's back pages.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=10+Bizarre+PC+Storage+Formats+That+Didn%27t+Quite+Cut+It%3A+4%3A+3-Inch+Compact+Floppy&rft.pub=PC+Magazine&rft.date=2017-06-21&rft_id=https%3A%2F%2Fwww.pcmag.com%2Ffeature%2F262600%2F10-bizarre-pc-storage-formats-that-didn-t-quite-cut-it%2F4&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-byte198401-20"><span class="mw-cite-backlink"><b><a href="#cite_ref-byte198401_20-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://archive.org/stream/byte-magazine-1984-01/BYTE-1984-01#page/n327/mode/2up">"The winning move. Hitachi's 3" floppy"</a>. <i>Byte</i> (advertisement). January 1984. p. 327<span class="reference-accessdate">. Retrieved <span class="nowrap">2014-12-25</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Byte&rft.atitle=The+winning+move.+Hitachi%27s+3%22+floppy&rft.pages=327&rft.date=1984-01&rft_id=https%3A%2F%2Farchive.org%2Fstream%2Fbyte-magazine-1984-01%2FBYTE-1984-01%23page%2Fn327%2Fmode%2F2up&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-Sharp_1986_CE1600F-21"><span class="mw-cite-backlink">^ <a href="#cite_ref-Sharp_1986_CE1600F_21-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Sharp_1986_CE1600F_21-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Sharp_1986_CE1600F_21-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="http://sharppocketcomputers.com/4HK7JnFJDuVm/Service/ce1600f_service_manual.pdf">"Model CE-1600F"</a> <span class="cs1-format">(PDF)</span>. <i>Sharp PC-1600 Service Manual</i>. Yamatokoriyama, Japan: <a href="/wiki/Sharp_Corporation" title="Sharp Corporation">Sharp Corporation</a>, Information Systems Group, Quality & Reliability Control Center. July 1986. pp. 98–104. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170323132153/http://sharppocketcomputers.com/4HK7JnFJDuVm/Service/ce1600f_service_manual.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2017-03-23<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-03-12</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=Model+CE-1600F&rft.btitle=Sharp+PC-1600+Service+Manual&rft.place=Yamatokoriyama%2C+Japan&rft.pages=98-104&rft.pub=Sharp+Corporation%2C+Information+Systems+Group%2C+Quality+%26+Reliability+Control+Center&rft.date=1986-07&rft_id=http%3A%2F%2Fsharppocketcomputers.com%2F4HK7JnFJDuVm%2FService%2Fce1600f_service_manual.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-Sharp_1986_CE140F-22"><span class="mw-cite-backlink">^ <a href="#cite_ref-Sharp_1986_CE140F_22-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Sharp_1986_CE140F_22-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Sharp_1986_CE140F_22-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="http://pockemul.free.fr/Documents/ce-140f_Service_manual.pdf"><i>Sharp Service Manual Model CE-140F Pocket Disk Drive</i></a> <span class="cs1-format">(PDF)</span>. <a href="/wiki/Sharp_Corporation" title="Sharp Corporation">Sharp Corporation</a>. 00ZCE140F/SME. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170311145818/http://pockemul.free.fr/Documents/ce-140f_Service_manual.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2017-03-11<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-03-11</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Sharp+Service+Manual+Model+CE-140F+Pocket+Disk+Drive&rft.pub=Sharp+Corporation&rft_id=http%3A%2F%2Fpockemul.free.fr%2FDocuments%2Fce-140f_Service_manual.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-1986_maxell_drives-23"><span class="mw-cite-backlink"><b><a href="#cite_ref-1986_maxell_drives_23-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBateman1986" class="citation magazine cs1">Bateman, Selby (March 1986). <a rel="nofollow" class="external text" href="http://www.atarimagazines.com/compute/issue70/054_1_THE_FUTURE_OF_MASS_STORAGE.php">"The Future of Mass Storage"</a>. <i>COMPUTE!</i>. No. 70. COMPUTE! Publications, Inc. p. 18<span class="reference-accessdate">. Retrieved <span class="nowrap">2018-10-07</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=COMPUTE%21&rft.atitle=The+Future+of+Mass+Storage&rft.issue=70&rft.pages=18&rft.date=1986-03&rft.aulast=Bateman&rft.aufirst=Selby&rft_id=http%3A%2F%2Fwww.atarimagazines.com%2Fcompute%2Fissue70%2F054_1_THE_FUTURE_OF_MASS_STORAGE.php&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-sieg198103-24"><span class="mw-cite-backlink"><b><a href="#cite_ref-sieg198103_24-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSieg,_M._G.1981" class="citation news cs1">Sieg, M. G. (March 1981). <a rel="nofollow" class="external text" href="https://archive.org/stream/1981-03-compute-magazine/Compute_Issue_010_1981_Mar#page/n69/mode/2up">"Flipping Your Disk"</a>. <i>Compute!</i>. p. 71<span class="reference-accessdate">. Retrieved <span class="nowrap">2013-10-26</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Compute%21&rft.atitle=Flipping+Your+Disk&rft.pages=71&rft.date=1981-03&rft.au=Sieg%2C+M.+G.&rft_id=https%3A%2F%2Farchive.org%2Fstream%2F1981-03-compute-magazine%2FCompute_Issue_010_1981_Mar%23page%2Fn69%2Fmode%2F2up&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-25"><span class="mw-cite-backlink"><b><a href="#cite_ref-25">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJoshi2006" class="citation book cs1">Joshi, Rajmohan (April 2006). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=LgdsbAfWv54C"><i>Introduction To Computers</i></a>. Isha Books. p. 79. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/9788182053793" title="Special:BookSources/9788182053793"><bdi>9788182053793</bdi></a><span class="reference-accessdate">. Retrieved <span class="nowrap">2023-03-03</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Introduction+To+Computers&rft.pages=79&rft.pub=Isha+Books&rft.date=2006-04&rft.isbn=9788182053793&rft.aulast=Joshi&rft.aufirst=Rajmohan&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DLgdsbAfWv54C&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-PCMagEnc-26"><span class="mw-cite-backlink">^ <a href="#cite_ref-PCMagEnc_26-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-PCMagEnc_26-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.pcmag.com/encyclopedia/term/super-floppy">"super floppy"</a>. <i>PCMag Encyclopedia</i>. The Computer Language Co Inc<span class="reference-accessdate">. Retrieved <span class="nowrap">2023-05-31</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=PCMag+Encyclopedia&rft.atitle=super+floppy&rft_id=https%3A%2F%2Fwww.pcmag.com%2Fencyclopedia%2Fterm%2Fsuper-floppy&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-MB20-27"><span class="mw-cite-backlink"><b><a href="#cite_ref-MB20_27-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKristina_B._Sullivan1990" class="citation news cs1">Kristina B. Sullivan (1990-10-15). "Researchers Press for 20M-Byte Floppy Standards". <i>PC Week</i>. p. 21.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=PC+Week&rft.atitle=Researchers+Press+for+20M-Byte+Floppy+Standards&rft.pages=21&rft.date=1990-10-15&rft.au=Kristina+B.+Sullivan&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-Hudek_GPT-28"><span class="mw-cite-backlink"><b><a href="#cite_ref-Hudek_GPT_28-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHudek2017" class="citation web cs1">Hudek, Ted (June 2017). <a rel="nofollow" class="external text" href="https://docs.microsoft.com/en-us/previous-versions/windows/hardware/design/dn640535(v=vs.85)">"Windows 10 hardware dev"</a>. <i>docs.microsoft.com</i>. Windows and GPT FAQ. <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=docs.microsoft.com&rft.atitle=Windows+10+hardware+dev&rft.date=2017-06&rft.aulast=Hudek&rft.aufirst=Ted&rft_id=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fprevious-versions%2Fwindows%2Fhardware%2Fdesign%2Fdn640535%28v%3Dvs.85%29&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-29"><span class="mw-cite-backlink"><b><a href="#cite_ref-29">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSeither1987" class="citation magazine cs1">Seither, Mike (October 1987). "Brier Technology fields a first: a 20M-byte, 3½-inch flexible disk". <i>Mini-Micro Systems</i>. Cahners Publishing Company. pp. 23, 26, 30.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Mini-Micro+Systems&rft.atitle=Brier+Technology+fields+a+first%3A+a+20M-byte%2C+3%C2%BD-inch+flexible+disk&rft.pages=23%2C+26%2C+30&rft.date=1987-10&rft.aulast=Seither&rft.aufirst=Mike&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-30"><span class="mw-cite-backlink"><b><a href="#cite_ref-30">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPollack1990" class="citation journal cs1">Pollack, Andrew (1990-03-14). <a rel="nofollow" class="external text" href="https://www.nytimes.com/1990/03/14/business/business-technology-the-evolution-of-the-floppy-disk-for-pc-s.html">"The Evolution of the Floppy Disk for PCs"</a>. <i>The New York Times</i>. Business Technology<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-06-19</span></span>. <q>[…] The Brier and Insite systems, which can store 20 megabytes, increase the number of tracks. […] The key to […] the Brier and Insite drives […] is that information is embedded in the tracks themselves and acts as a homing signal, keeping the head on the track. In Brier's Flextra system, a low-frequency magnetic homing signal is embedded at the bottom of the barium ferrite coating after the disk is manufactured. Later, the data are recorded in the top of the layer, using a higher-frequency signal. The Brier system cannot read and write lower-capacity disks, although the company says it will introduce a model that can do that later this year. Insite's Floptical disks, which can store 20.8 megabytes, use homing technology similar to that used in optical disks. Microscopic grooves are stamped into the diskettes at the time the disks are made. A light-emitting diode rides along with the magnetic head and shines light into the groove, which is reflected and received by a photo-detector. If the head starts to sway from the track, the light will miss the groove and the reflection will change, alerting the system to adjust course. While the tracking is optical, the data are recorded magnetically in tracks between the grooves. To achieve compatibility with existing lower-capacity drives, the system uses two magnetic recording heads - one to read the high-capacity diskettes and the other to read conventional diskettes. […] Brier has designed its system from scratch to achieve higher speeds. Insite uses a conventional floppy drive and homing components that are used in compact disk players. […]</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+New+York+Times&rft.atitle=The+Evolution+of+the+Floppy+Disk+for+PCs&rft.date=1990-03-14&rft.aulast=Pollack&rft.aufirst=Andrew&rft_id=https%3A%2F%2Fwww.nytimes.com%2F1990%2F03%2F14%2Fbusiness%2Fbusiness-technology-the-evolution-of-the-floppy-disk-for-pc-s.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-31"><span class="mw-cite-backlink"><b><a href="#cite_ref-31">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.verycomputer.com/26_3919ffadf06acbac_1.htm">"<span class="cs1-kern-left"></span>"Floptical" drive info"</a>. 1990-01-17. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170619140852/http://www.verycomputer.com/26_3919ffadf06acbac_1.htm">Archived</a> from the original on 2017-06-19<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-06-19</span></span>. <q>[…] INSITE I325/I325VM: CAPACITY unformatted 25 megs, formatted 20.8 megs, Recording density 23980 BPI (RLL), Transfer from DISK 1.6 Mbit/Sec, Buffer transfer rate 2 Mbyte/Sec, Average Seek time 65 msec, Settle time 15 msec, Motor start time 750 msec, # of read/write heads 2, Track density 1250 TPI, Cylinders 755, Tracks 1510, Rotational speed 720 rpm, Power dissipation 6 watt average, Data reliability <1 error unrecoverable error per 10^11 bits, Seek errors <1 error per 10^6 seeks, Drive dimensions H: 1.625" W: 4.0" D 5.91", […] SCSI […] Common Command Set (CSC), soft formatting, error checking and correction (ECC), and defect mapping. In addition, the I325VM (variable mode) offers FULL READ AND WRITE DOWNWARD COMPATIBILITY with current 3.5 inch 720 kB and 1.44 MB formatted diskettes. […] Brier Technology Flextra BR 3020: CAPACITY unformatted 25.0 meg, formatted 21.4 meg, CONFIGURATION Number of disks 1, Data Surfaces 2, Data heads 2, Servo System T^3, Tracks per surface 516, Track density (TPI) 777, Track capacity (bytes typical) 20480, Blocks per drive (512 byte) 42080, Blocks per surface (512 byte) 21040, Blocks per track (typical 512 byte) 40, MEDIA (flexible diskette) 3.5", PERFORMANCE Actuator, Linear voice coil motor, Seek time (includes setting), Track to track (ms) 15, Average (ms) 35, Maximum (ms) 70, Average latency (ms) 41.6, Rotation speed (RPM) 720, Data transfer rate, To/From the media (megabits/sec) 2.2, To/from the buffer (megabytes/sec) 1.25, Start time 1 sec, Stop time 1 sec, READ/WRITE, Interface SCSI, Recording method BRLL, Recording density (BPI) 26000, COMPATIBILITY, the BR3225 (not BR3020) reads IBM formatted floppy disks, Dimensions, L: 5.75", W: 4.0", H: 1.625" Weight: 1.6 pounds, Power requirements (*), DC Input +12 volts DC, +5 volts DC, Power dissipation <9 watts (operational-seeking), Power management algorithms reduce power to an average of 2.0 watts […]</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=%22Floptical%22+drive+info&rft.date=1990-01-17&rft_id=http%3A%2F%2Fwww.verycomputer.com%2F26_3919ffadf06acbac_1.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-32"><span class="mw-cite-backlink"><b><a href="#cite_ref-32">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFRyan1992" class="citation journal cs1">Ryan, Bob (March 1992). <a rel="nofollow" class="external text" href="https://archive.org/stream/byte-magazine-1992-03/1992_03_BYTE_17-03_Memory_and_Storage_Advances_djvu.txt">"Scaling the memory pyramid: Floppy - But Very Large"</a>. <i><a href="/wiki/BYTE" class="mw-redirect" title="BYTE">BYTE</a></i>. <b>17</b> (3): 161–169, 166–167.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=BYTE&rft.atitle=Scaling+the+memory+pyramid%3A+Floppy+-+But+Very+Large&rft.volume=17&rft.issue=3&rft.pages=161-169%2C+166-167&rft.date=1992-03&rft.aulast=Ryan&rft.aufirst=Bob&rft_id=https%3A%2F%2Farchive.org%2Fstream%2Fbyte-magazine-1992-03%2F1992_03_BYTE_17-03_Memory_and_Storage_Advances_djvu.txt&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-33"><span class="mw-cite-backlink"><b><a href="#cite_ref-33">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation cs2"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20110727034443/http://linuxcommand.org/man_pages/floppy8.html"><i>floppy (8)</i></a> (manual page), Linux command, archived from <a rel="nofollow" class="external text" href="http://linuxcommand.org/man_pages/floppy8.html">the original</a> <span class="cs1-format">(man)</span> on 2011-07-27<span class="reference-accessdate">, retrieved <span class="nowrap">2011-06-23</span></span>, <q>6848 cylinders × 36 blocks/cylinder × 512 bytes</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=floppy+%288%29&rft.pub=Linux+command&rft_id=http%3A%2F%2Flinuxcommand.org%2Fman_pages%2Ffloppy8.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span>.</span> </li> <li id="cite_note-34"><span class="mw-cite-backlink"><b><a href="#cite_ref-34">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation cs2"><a rel="nofollow" class="external text" href="https://www.pcmag.com/encyclopedia_term/0,2542,t=LS-120&i=46376,00.asp">"LS-120"</a>, <i>PC Magazine</i> (encyclopedia term)</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=PC+Magazine&rft.atitle=LS-120&rft_id=https%3A%2F%2Fwww.pcmag.com%2Fencyclopedia_term%2F0%2C2542%2Ct%3DLS-120%26i%3D46376%2C00.asp&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span><sup class="noprint Inline-Template"><span style="white-space: nowrap;">[<i><a href="/wiki/Wikipedia:Link_rot" title="Wikipedia:Link rot"><span title=" Dead link tagged June 2023">permanent dead link</span></a></i><span style="visibility:hidden; color:transparent; padding-left:2px">‍</span>]</span></sup></span> </li> <li id="cite_note-oldskool-disk2fdi-35"><span class="mw-cite-backlink"><b><a href="#cite_ref-oldskool-disk2fdi_35-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJonguinJoguin2004" class="citation web cs1">Jonguin, Vincent; Joguin, Sonia (2004). <a rel="nofollow" class="external text" href="http://www.oldskool.org/disk2fdi">"Disk2FDI Homepage"</a>. <i>Old skool</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2006-05-25</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Old+skool&rft.atitle=Disk2FDI+Homepage&rft.date=2004&rft.aulast=Jonguin&rft.aufirst=Vincent&rft.au=Joguin%2C+Sonia&rft_id=http%3A%2F%2Fwww.oldskool.org%2Fdisk2fdi&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span></span> </li> <li id="cite_note-amihw-kcs2xhd-36"><span class="mw-cite-backlink"><b><a href="#cite_ref-amihw-kcs2xhd_36-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation cs2"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20110927024552/http://www.amiga-hardware.com/showhardware.cgi?HARDID=773"><i>KCS Dual HD Drive for Amiga computers</i></a>, Amiga hardware, archived from <a rel="nofollow" class="external text" href="http://www.amiga-hardware.com/showhardware.cgi?HARDID=773">the original</a> on 2011-09-27<span class="reference-accessdate">, retrieved <span class="nowrap">2011-06-23</span></span></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=KCS+Dual+HD+Drive+for+Amiga+computers&rft.pub=Amiga+hardware&rft_id=http%3A%2F%2Fwww.amiga-hardware.com%2Fshowhardware.cgi%3FHARDID%3D773&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span>.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Bibliography">Bibliography</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=29" title="Edit section: Bibliography"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFEnglischSzczepanowski1984" class="citation cs2">Englisch, Lothar; Szczepanowski, Norbert (1984) [1983 German, Düsseldorf: Data Becker], <i>The Anatomy of the 1541 Disk Drive</i>, Grand Rapids, MI: Abacus Software, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-916439-01-1" title="Special:BookSources/0-916439-01-1"><bdi>0-916439-01-1</bdi></a></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Anatomy+of+the+1541+Disk+Drive&rft.place=Grand+Rapids%2C+MI&rft.pub=Abacus+Software&rft.date=1984&rft.isbn=0-916439-01-1&rft.aulast=Englisch&rft.aufirst=Lothar&rft.au=Szczepanowski%2C+Norbert&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span>.</li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation cs2"><a rel="nofollow" class="external text" href="http://hpmuseum.net/document.php?hwfile=2702"><i>9121D/S Disc Memory Operator's Manual</i></a>, Hewlett Packard, 1982-09-01, Part No. 09121-90000</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=9121D%2FS+Disc+Memory+Operator%27s+Manual&rft.pub=Hewlett+Packard&rft.date=1982-09-01&rft_id=http%3A%2F%2Fhpmuseum.net%2Fdocument.php%3Fhwfile%3D2702&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span>.</li> <li>Immers, Richard; Neufeld, Gerald G. (1984). <i>Inside Commodore DOS. The Complete Guide to the 1541 Disk Operating System</i>. Data most & Reston (Prentice-Hall). <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-8359-3091-2" title="Special:BookSources/0-8359-3091-2">0-8359-3091-2</a>.</li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWeyhrich2005" class="citation cs2">Weyhrich, Steven (2005), <a rel="nofollow" class="external text" href="http://apple2history.org/history/ah05.html">"The Disk II"</a>, <i>Apple II History</i></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=The+Disk+II&rft.btitle=Apple+II+History&rft.date=2005&rft.aulast=Weyhrich&rft.aufirst=Steven&rft_id=http%3A%2F%2Fapple2history.org%2Fhistory%2Fah05.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span>: a detailed essay describing one of the first commercial floppy disk drives.</li></ul> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Floppy_disk_variants&action=edit&section=30" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style data-mw-deduplicate="TemplateStyles:r1237033735">@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}</style><div class="side-box side-box-right plainlinks sistersitebox"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span></div> <div class="side-box-text plainlist">Wikimedia Commons has media related to <a href="https://commons.wikimedia.org/wiki/Special:Search/Floppy_disk_variants" class="extiw" title="commons:Special:Search/Floppy disk variants"><span style="font-style:italic; font-weight:bold;">Floppy disk variants</span></a>.</div></div> </div> <ul><li><a rel="nofollow" class="external text" href="http://www.isdaman.com/alsos/hardware/fdc/floppy.htm">Programming Floppy Disk Controllers</a></li> <li><a rel="nofollow" class="external text" href="http://computer.howstuffworks.com/floppy-disk-drive.htm">HowStuffWorks: How Floppy Disk Drives Work</a></li> <li><a rel="nofollow" class="external text" href="http://www.computerhope.com/help/floppy.htm">Computer Hope: Information about computer floppy drives</a></li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20040628063124/http://www.ncits.org/Archive/2000/n751_775.htm">NCITS</a> (mention of ANSI X3.162 and X3.171 floppy standards)</li> <li><a rel="nofollow" class="external text" href="http://www.retrotechnology.com/herbs_stuff/drive.html#interleave">Floppy disk drives and media technical information</a></li> <li><a rel="nofollow" class="external text" href="https://obsoletemedia.org/data/disk/#fd">Floppy Disk Formats</a> at the Museum of Obsolete Media</li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation cs2"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=kawCnk4051wC&pg=PA156">"War of the Microdisks"</a> <span class="cs1-format">(Books)</span>, <i>Popular Science</i>, pp. 139–156, Dec 1983</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Popular+Science&rft.atitle=War+of+the+Microdisks&rft.pages=139-156&rft.date=1983-12&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DkawCnk4051wC%26pg%3DPA156&rfr_id=info%3Asid%2Fen.wikipedia.org%3AFloppy+disk+variants" class="Z3988"></span>.</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist dd:last-child::after,.mw-parser-output .hlist dt:last-child::after,.mw-parser-output .hlist li:last-child::after{content:none}.mw-parser-output .hlist dd dd:first-child::before,.mw-parser-output .hlist dd dt:first-child::before,.mw-parser-output .hlist dd li:first-child::before,.mw-parser-output .hlist dt dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}</style><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output .navbox-group,.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow{padding:0.25em 1em;line-height:1.5em;text-align:center}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right}.mw-parser-output .navbox,.mw-parser-output .navbox-subgroup{background-color:#fdfdfd}.mw-parser-output .navbox-list{line-height:1.5em;border-color:#fdfdfd}.mw-parser-output .navbox-list-with-group{text-align:left;border-left-width:2px;border-left-style:solid}.mw-parser-output tr+tr>.navbox-abovebelow,.mw-parser-output tr+tr>.navbox-group,.mw-parser-output tr+tr>.navbox-image,.mw-parser-output tr+tr>.navbox-list{border-top:2px solid #fdfdfd}.mw-parser-output .navbox-title{background-color:#ccf}.mw-parser-output .navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Magnetic_storage_media" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Magnetic_storage_media" title="Template:Magnetic storage media"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Magnetic_storage_media" title="Template talk:Magnetic storage media"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Magnetic_storage_media" title="Special:EditPage/Template:Magnetic storage media"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Magnetic_storage_media" style="font-size:114%;margin:0 4em"><a href="/wiki/Magnetic_storage" title="Magnetic storage">Magnetic storage</a> media</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Wire_recording" title="Wire recording">Wire</a> (1898)</li> <li><a href="/wiki/Magnetic_tape" title="Magnetic tape">Tape</a> (1928)</li> <li><a href="/wiki/Drum_memory" title="Drum memory">Drum</a> (1932)</li> <li><a href="/wiki/Magnetic-core_memory" title="Magnetic-core memory">Ferrite core</a> (1949)</li> <li><a href="/wiki/Hard_disk_drive" title="Hard disk drive">Hard disk</a> (1956)</li> <li><a href="/wiki/Magnetic_stripe_card" class="mw-redirect" title="Magnetic stripe card">Stripe card</a> (1956)</li> <li><a href="/wiki/Magnetic_ink_character_recognition" title="Magnetic ink character recognition">MICR</a> (1956)</li> <li><a href="/wiki/Thin-film_memory" title="Thin-film memory">Thin film</a> (1962)</li> <li><a href="/wiki/NCR_CRAM" title="NCR CRAM">CRAM</a> (1962)</li> <li><a href="/wiki/Twistor_memory" title="Twistor memory">Twistor</a> (~1968)</li> <li><a href="/wiki/Floppy_disk" title="Floppy disk">Floppy disk</a> (1969)</li> <li><a href="/wiki/Bubble_memory" title="Bubble memory">Bubble</a> (~1970)</li> <li><a href="/wiki/Magnetoresistive_random-access_memory" class="mw-redirect" title="Magnetoresistive random-access memory">MRAM</a> (1995)</li> <li><a href="/wiki/Racetrack_memory" title="Racetrack memory">Racetrack</a> (2008)</li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Basic_computer_components" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Basic_computer_components" title="Template:Basic computer components"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Basic_computer_components" title="Template talk:Basic computer components"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Basic_computer_components" title="Special:EditPage/Template:Basic computer components"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Basic_computer_components" style="font-size:114%;margin:0 4em">Basic <a href="/wiki/Computer" title="Computer">computer</a> <a href="/wiki/Computer_hardware" title="Computer hardware">components</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Input_device" title="Input device">Input devices</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Pointing_device" title="Pointing device">Pointing devices</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Graphics_tablet" title="Graphics tablet">Graphics tablet</a></li> <li><a href="/wiki/Game_controller" title="Game controller">Game controller</a></li> <li><a href="/wiki/Light_pen" title="Light pen">Light pen</a></li> <li><a href="/wiki/Computer_mouse" title="Computer mouse">Mouse</a> <ul><li><a href="/wiki/Optical_mouse" title="Optical mouse">Optical</a></li></ul></li> <li><a href="/wiki/Optical_trackpad" title="Optical trackpad">Optical trackpad</a></li> <li><a href="/wiki/Pointing_stick" title="Pointing stick">Pointing stick</a></li> <li><a href="/wiki/Touchpad" title="Touchpad">Touchpad</a></li> <li><a href="/wiki/Touchscreen" title="Touchscreen">Touchscreen</a></li> <li><a href="/wiki/Trackball" title="Trackball">Trackball</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Computer_keyboard" title="Computer keyboard">Keyboard</a></li> <li><a href="/wiki/Image_scanner" title="Image scanner">Image scanner</a></li> <li><a href="/wiki/Graphics_card" title="Graphics card">Graphics card</a> <ul><li><a href="/wiki/Graphics_processing_unit" title="Graphics processing unit">GPU</a></li></ul></li> <li><a href="/wiki/Microphone" title="Microphone">Microphone</a></li> <li><a href="/wiki/Refreshable_braille_display" title="Refreshable braille display">Refreshable braille display</a></li> <li><a href="/wiki/Sound_card" title="Sound card">Sound card</a> <ul><li><a href="/wiki/Sound_chip" title="Sound chip">Sound chip</a></li></ul></li> <li><a href="/wiki/Webcam" title="Webcam">Webcam</a> <ul><li><a href="/wiki/Softcam" title="Softcam">Softcam</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Output_device" title="Output device">Output devices</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Computer_monitor" title="Computer monitor">Monitor</a> <ul><li><a href="/wiki/Electronic_visual_display" title="Electronic visual display">Screen</a></li></ul></li> <li><a href="/wiki/Refreshable_braille_display" title="Refreshable braille display">Refreshable braille display</a></li> <li><a href="/wiki/Printer_(computing)" title="Printer (computing)">Printer</a> <ul><li><a href="/wiki/Plotter" title="Plotter">Plotter</a></li></ul></li> <li><a href="/wiki/Computer_speakers" title="Computer speakers">Speakers</a></li> <li><a href="/wiki/Sound_card" title="Sound card">Sound card</a></li> <li><a href="/wiki/Graphics_card" title="Graphics card">Graphics card</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Removable_media" title="Removable media">Removable <br /> data storage</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Disk_pack" title="Disk pack">Disk pack</a></li> <li><a href="/wiki/Floppy_disk" title="Floppy disk">Floppy disk</a></li> <li><a href="/wiki/Optical_disc" title="Optical disc">Optical disc</a> <ul><li><a href="/wiki/Compact_disc" title="Compact disc">CD</a></li> <li><a href="/wiki/DVD" title="DVD">DVD</a></li> <li><a href="/wiki/Blu-ray" title="Blu-ray">Blu-ray</a></li></ul></li> <li><a href="/wiki/Flash_memory" title="Flash memory">Flash memory</a> <ul><li><a href="/wiki/Memory_card" title="Memory card">Memory card</a></li> <li><a href="/wiki/USB_flash_drive" title="USB flash drive">USB flash drive</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Computer_case" title="Computer case">Computer case</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Central_processing_unit" title="Central processing unit">Central processing unit</a> <ul><li><a href="/wiki/Microprocessor" title="Microprocessor">Microprocessor</a></li></ul></li> <li><a href="/wiki/Motherboard" title="Motherboard">Motherboard</a></li> <li><a href="/wiki/Computer_memory" title="Computer memory">Memory</a> <ul><li><a href="/wiki/Random-access_memory" title="Random-access memory">RAM</a></li> <li><a href="/wiki/Nonvolatile_BIOS_memory" title="Nonvolatile BIOS memory">BIOS</a></li></ul></li> <li><a href="/wiki/Computer_data_storage" title="Computer data storage">Data storage</a> <ul><li><a href="/wiki/Hard_disk_drive" title="Hard disk drive">HDD</a></li> <li><a href="/wiki/Solid-state_drive" title="Solid-state drive">SSD</a> (<a href="/wiki/SATA" title="SATA">SATA</a> / <a href="/wiki/NVM_Express" title="NVM Express">NVMe</a>)</li> <li><a href="/wiki/Solid-state_hybrid_drive" class="mw-redirect" title="Solid-state hybrid drive">SSHD</a></li></ul></li> <li><a href="/wiki/Power_supply_unit_(computer)" title="Power supply unit (computer)">Power supply</a> <ul><li><a href="/wiki/Switched-mode_power_supply" title="Switched-mode power supply">SMPS</a></li></ul></li> <li><a href="/wiki/MOSFET" title="MOSFET">MOSFET</a> <ul><li><a href="/wiki/Power_MOSFET" title="Power MOSFET">Power MOSFET</a></li> <li><a href="/wiki/Voltage_regulator_module" title="Voltage regulator module">VRM</a></li></ul></li> <li><a href="/wiki/Network_interface_controller" title="Network interface controller">Network interface controller</a></li> <li><a href="/wiki/Fax_modem" title="Fax modem">Fax modem</a></li> <li><a href="/wiki/Expansion_card" title="Expansion card">Expansion card</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Computer_port_(hardware)" title="Computer port (hardware)">Ports</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Current</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ethernet" title="Ethernet">Ethernet</a></li> <li><a href="/wiki/USB" title="USB">USB</a></li> <li><a href="/wiki/Thunderbolt_(interface)" title="Thunderbolt (interface)">Thunderbolt</a></li> <li><a href="/wiki/Phone_connector_(audio)" title="Phone connector (audio)">Analog audio jack</a></li> <li><a href="/wiki/DisplayPort" title="DisplayPort">DisplayPort</a></li> <li><a href="/wiki/HDMI" title="HDMI">HDMI</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Obsolete</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/IEEE_1394" title="IEEE 1394">FireWire</a> (IEEE 1394)</li> <li><a href="/wiki/Parallel_port" title="Parallel port">Parallel port</a></li> <li><a href="/wiki/Serial_port" title="Serial port">Serial port</a></li> <li><a href="/wiki/Game_port" title="Game port">Game port</a></li> <li><a href="/wiki/PS/2_port" title="PS/2 port">PS/2 port</a></li> <li><a href="/wiki/Serial_ATA#eSATA" class="mw-redirect" title="Serial ATA">eSATA</a></li> <li><a href="/wiki/Digital_Visual_Interface" title="Digital Visual Interface">DVI</a></li> <li><a href="/wiki/VGA_connector" title="VGA connector">VGA</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/History_of_computing_hardware" title="History of computing hardware">History of computing hardware</a></li> <li><a href="/wiki/History_of_computing_hardware_(1960s%E2%80%93present)" title="History of computing hardware (1960s–present)">History of computing hardware (1960s–present)</a></li> <li><a href="/wiki/List_of_pioneers_in_computer_science" title="List of pioneers in computer science">List of pioneers in computer science</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Standards_of_Ecma_International" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="3"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Ecma_International_Standards" title="Template:Ecma International Standards"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Ecma_International_Standards" title="Template talk:Ecma International Standards"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Ecma_International_Standards" title="Special:EditPage/Template:Ecma International Standards"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Standards_of_Ecma_International" style="font-size:114%;margin:0 4em">Standards of <a href="/wiki/Ecma_International" title="Ecma International">Ecma International</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Application interfaces</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ANSI_escape_code" title="ANSI escape code">ANSI escape code</a></li> <li><a href="/wiki/Application_Programming_Interface_for_Windows" title="Application Programming Interface for Windows">APIW</a></li> <li><a href="/wiki/Common_Language_Infrastructure" title="Common Language Infrastructure">Common Language Infrastructure</a></li> <li><a href="/wiki/Office_Open_XML" title="Office Open XML">Office Open XML</a></li> <li><a href="/wiki/Open_XML_Paper_Specification" title="Open XML Paper Specification">OpenXPS</a></li></ul> </div></td><td class="noviewer navbox-image" rowspan="7" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:Ecma_International_Logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/04/Ecma_International_Logo.svg/100px-Ecma_International_Logo.svg.png" decoding="async" width="100" height="27" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/04/Ecma_International_Logo.svg/150px-Ecma_International_Logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/04/Ecma_International_Logo.svg/200px-Ecma_International_Logo.svg.png 2x" data-file-width="201" data-file-height="54" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">File systems (tape)</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Advanced_Intelligent_Tape" title="Advanced Intelligent Tape">Advanced Intelligent Tape</a></li> <li><a href="/wiki/Digital_Data_Storage" title="Digital Data Storage">DDS</a></li> <li><a href="/wiki/Digital_Linear_Tape" title="Digital Linear Tape">DLT</a></li> <li><a href="/wiki/Digital_Linear_Tape" title="Digital Linear Tape">Super DLT</a></li> <li><a href="/wiki/Linear_Tape-Open" title="Linear Tape-Open">Linear Tape-Open</a> (Ultrium-1)</li> <li><a href="/wiki/VXA" title="VXA">VXA</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">File systems (disk)</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/CD-ROM" title="CD-ROM">CD-ROM</a></li> <li><a href="/wiki/ISO_9660" title="ISO 9660">CD File System</a> (CDFS)</li> <li><a href="/wiki/File_Allocation_Table" title="File Allocation Table">FAT</a> <ul><li><a href="/wiki/FAT12" class="mw-redirect" title="FAT12">FAT12</a></li> <li><a href="/wiki/FAT16" class="mw-redirect" title="FAT16">FAT16</a></li> <li><a href="/wiki/FAT16B" class="mw-redirect" title="FAT16B">FAT16B</a></li></ul></li> <li><a href="/wiki/Floppy_disk" title="Floppy disk">FD</a></li> <li><a href="/wiki/Universal_Disk_Format" title="Universal Disk Format">UDF</a></li> <li><a href="/wiki/Ultra_Density_Optical" title="Ultra Density Optical">Ultra Density Optical</a></li> <li><a href="/wiki/Universal_Media_Disc" title="Universal Media Disc">Universal Media Disc</a></li> <li><a href="/wiki/Holographic_Versatile_Disc" title="Holographic Versatile Disc">Holographic Versatile Disc</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Graphics</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Universal_3D" title="Universal 3D">Universal 3D</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Programming languages</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/C%2B%2B/CLI" title="C++/CLI">C++/CLI</a></li> <li><a href="/wiki/C_Sharp_(programming_language)" title="C Sharp (programming language)">C#</a></li> <li><a href="/wiki/Eiffel_(programming_language)" title="Eiffel (programming language)">Eiffel</a></li> <li><a href="/wiki/JavaScript" title="JavaScript">JavaScript</a> (<a href="/wiki/ECMAScript_for_XML" title="ECMAScript for XML">E4X</a>, <a href="/wiki/ECMAScript" title="ECMAScript">ECMAScript</a>)</li> <li><a href="/wiki/Dart_(programming_language)" title="Dart (programming language)">Dart</a></li> <li><a href="/wiki/Minimal_BASIC" title="Minimal BASIC">Minimal BASIC</a></li> <li><a href="/wiki/Full_BASIC" title="Full BASIC">Full BASIC</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Radio link interfaces</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Near-field_communication" title="Near-field communication">NFC</a></li> <li><a href="/wiki/Ultra-wideband" title="Ultra-wideband">UWB</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ISO/IEC_2022" title="ISO/IEC 2022">ECMA-35</a></li> <li><a href="/wiki/JSON" title="JSON">JSON</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div><a href="/wiki/List_of_Ecma_standards" title="List of Ecma standards">List of Ecma standards</a> (1961 – present)</div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Floppy_disk_variants&oldid=1251896409#Superfloppy">https://en.wikipedia.org/w/index.php?title=Floppy_disk_variants&oldid=1251896409#Superfloppy</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Rotating_disc_computer_storage_media" title="Category:Rotating disc computer storage media">Rotating disc computer storage media</a></li><li><a href="/wiki/Category:Legacy_hardware" title="Category:Legacy hardware">Legacy hardware</a></li><li><a href="/wiki/Category:American_inventions" title="Category:American inventions">American inventions</a></li><li><a href="/wiki/Category:Floppy_disk_computer_storage" title="Category:Floppy disk computer storage">Floppy disk computer storage</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:CS1_Hungarian-language_sources_(hu)" title="Category:CS1 Hungarian-language sources (hu)">CS1 Hungarian-language sources (hu)</a></li><li><a href="/wiki/Category:All_articles_with_dead_external_links" title="Category:All articles with dead external links">All articles with dead external links</a></li><li><a href="/wiki/Category:Articles_with_dead_external_links_from_June_2023" title="Category:Articles with dead external links from June 2023">Articles with dead external links from June 2023</a></li><li><a href="/wiki/Category:Articles_with_permanently_dead_external_links" title="Category:Articles with permanently dead external links">Articles with permanently dead external links</a></li><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short description</a></li><li><a href="/wiki/Category:Short_description_is_different_from_Wikidata" title="Category:Short description is different from Wikidata">Short description is different from Wikidata</a></li><li><a href="/wiki/Category:Use_dmy_dates_from_August_2019" title="Category:Use dmy dates from August 2019">Use dmy dates from August 2019</a></li><li><a href="/wiki/Category:Articles_containing_Hungarian-language_text" title="Category:Articles containing Hungarian-language text">Articles containing Hungarian-language text</a></li><li><a href="/wiki/Category:Articles_needing_additional_references_from_October_2012" title="Category:Articles needing additional references from October 2012">Articles needing additional references from October 2012</a></li><li><a href="/wiki/Category:All_articles_needing_additional_references" title="Category:All articles needing additional references">All articles needing additional references</a></li><li><a href="/wiki/Category:All_articles_with_unsourced_statements" title="Category:All articles with unsourced statements">All articles with unsourced statements</a></li><li><a href="/wiki/Category:Articles_with_unsourced_statements_from_October_2007" title="Category:Articles with unsourced statements from October 2007">Articles with unsourced statements from October 2007</a></li><li><a href="/wiki/Category:Articles_with_unsourced_statements_from_April_2010" title="Category:Articles with unsourced statements from April 2010">Articles with unsourced statements from April 2010</a></li><li><a href="/wiki/Category:Commons_link_is_the_pagename" title="Category:Commons link is the pagename">Commons link is the pagename</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 18 October 2024, at 18:00<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. By using this site, you agree to the <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Terms_of_Use" class="extiw" title="foundation:Special:MyLanguage/Policy:Terms of Use">Terms of Use</a> and <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy" class="extiw" title="foundation:Special:MyLanguage/Policy:Privacy policy">Privacy Policy</a>. Wikipedia® is a registered trademark of the <a rel="nofollow" class="external text" href="https://wikimediafoundation.org/">Wikimedia Foundation, Inc.</a>, a non-profit organization.</li> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy">Privacy policy</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:About">About Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:General_disclaimer">Disclaimers</a></li> <li id="footer-places-contact"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us">Contact Wikipedia</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Code of Conduct</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Developers</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/en.wikipedia.org">Statistics</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement">Cookie statement</a></li> <li id="footer-places-mobileview"><a href="//en.m.wikipedia.org/w/index.php?title=Floppy_disk_variants&mobileaction=toggle_view_mobile#Superfloppy" class="noprint stopMobileRedirectToggle">Mobile view</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://wikimediafoundation.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/static/images/footer/wikimedia-button.svg" width="84" height="29" alt="Wikimedia Foundation" loading="lazy"></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/w/resources/assets/poweredby_mediawiki.svg" alt="Powered by MediaWiki" width="88" height="31" loading="lazy"></a></li> </ul> </footer> </div> </div> </div> <div class="vector-settings" id="p-dock-bottom"> <ul></ul> </div><script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-f69cdc8f6-nb8ts","wgBackendResponseTime":145,"wgPageParseReport":{"limitreport":{"cputime":"0.994","walltime":"1.240","ppvisitednodes":{"value":4051,"limit":1000000},"postexpandincludesize":{"value":131255,"limit":2097152},"templateargumentsize":{"value":4062,"limit":2097152},"expansiondepth":{"value":17,"limit":100},"expensivefunctioncount":{"value":16,"limit":500},"unstrip-depth":{"value":1,"limit":20},"unstrip-size":{"value":169855,"limit":5000000},"entityaccesscount":{"value":1,"limit":400},"timingprofile":["100.00% 1066.400 1 -total"," 33.30% 355.107 1 Template:Reflist"," 11.24% 119.875 1 Template:Lang"," 9.91% 105.628 5 Template:Navbox"," 9.72% 103.698 4 Template:Cite_news"," 8.20% 87.466 1 Template:Magnetic_storage_media"," 8.16% 87.036 1 Template:Short_description"," 7.18% 76.521 16 Template:Cite_web"," 6.40% 68.249 1 Template:Refimprove"," 5.94% 63.371 1 Template:Ambox"]},"scribunto":{"limitreport-timeusage":{"value":"0.627","limit":"10.000"},"limitreport-memusage":{"value":18202666,"limit":52428800}},"cachereport":{"origin":"mw-api-int.codfw.canary-6594497df4-pkvk4","timestamp":"20241122153433","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"Floppy disk variants","url":"https:\/\/en.wikipedia.org\/wiki\/Floppy_disk_variants#Superfloppy","sameAs":"http:\/\/www.wikidata.org\/entity\/Q5460212","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q5460212","author":{"@type":"Organization","name":"Contributors to Wikimedia projects"},"publisher":{"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2011-06-23T10:04:00Z","dateModified":"2024-10-18T18:00:20Z","image":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/d\/d6\/Maxell_Compact_Floppy_Disk_CF2-D_20050125.jpg","headline":"overview about floppy disk variants"}</script> </body> </html>