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id="toc-U.2_compared_with_M.2-sublist" class="vector-toc-list"> <li id="toc-As_implemented" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#As_implemented"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>As implemented</span> </div> </a> <ul id="toc-As_implemented-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-U.3" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#U.3"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>U.3</span> </div> </a> <ul id="toc-U.3-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> 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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"><span>Not to be confused with <a href="/wiki/U2" title="U2">U2</a>.</span> <span>For other uses, see <a href="/wiki/U2_(disambiguation)" class="mw-disambig" title="U2 (disambiguation)">U2 (disambiguation)</a>.</span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:OCZ_Z6300_NVMe_flash_SSD,_U.2_(SFF-8639)_form-factor.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/OCZ_Z6300_NVMe_flash_SSD%2C_U.2_%28SFF-8639%29_form-factor.jpg/310px-OCZ_Z6300_NVMe_flash_SSD%2C_U.2_%28SFF-8639%29_form-factor.jpg" decoding="async" width="310" height="178" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/OCZ_Z6300_NVMe_flash_SSD%2C_U.2_%28SFF-8639%29_form-factor.jpg/465px-OCZ_Z6300_NVMe_flash_SSD%2C_U.2_%28SFF-8639%29_form-factor.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e2/OCZ_Z6300_NVMe_flash_SSD%2C_U.2_%28SFF-8639%29_form-factor.jpg/620px-OCZ_Z6300_NVMe_flash_SSD%2C_U.2_%28SFF-8639%29_form-factor.jpg 2x" data-file-width="1680" data-file-height="962" /></a><figcaption>SSDs with U.2 interface</figcaption></figure> <p><b>U.2</b> (pronounced 'u-dot-2'<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>), using the port <b>SFF-8639</b>, is a computer interface standard for connecting <a href="/wiki/Solid-state_drive" title="Solid-state drive">solid-state drives</a> (SSDs) to a computer. It covers the physical connector, electrical characteristics, and communication protocols. </p><p>It was developed for the enterprise market and designed to be used with new <a href="/wiki/PCI_Express" title="PCI Express">PCI Express</a> drives (<a href="/wiki/NVM_Express" title="NVM Express">NVM Express</a>) along with <a href="/wiki/Serial_Attached_SCSI" title="Serial Attached SCSI">SAS</a> and <a href="/wiki/Serial_ATA" class="mw-redirect" title="Serial ATA">SATA</a> drives. It uses up to four PCI Express lanes and two SATA lanes. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=U.2&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Enterprise SSD form factor was developed by the SSD Form Factor Working Group (SFFWG). The specification was released on December 20, 2011, as a mechanism for providing PCI Express connections to SSDs for the enterprise market. Goals included being usable in existing 2.5" and 3.5" form factors, to be hot swappable and to allow legacy SAS and SATA drives to be mixed using the same connector family.<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> </p><p>In June 2015, the SFFWG announced that the connector was being renamed to U.2.<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> </p> <div class="mw-heading mw-heading2"><h2 id="Connector">Connector</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=U.2&action=edit&section=2" title="Edit section: Connector"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The U.2 connector is mechanically identical to the <a href="/wiki/SATA_Express#Connectors" title="SATA Express">SATA Express device plug</a>, but provides four PCI Express lanes through a different usage of available pins.<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> </p><p>U.2 devices may be connected to an <a href="/wiki/M.2" title="M.2">M.2</a> port using an adapter.<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> </p> <div class="mw-heading mw-heading2"><h2 id="Availability">Availability</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=U.2&action=edit&section=3" title="Edit section: Availability"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In November 2015, Intel introduced the 750 series SSD which is available in both PCI Express and U.2 variants.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p><p>Since then, U.2 has achieved a high level of support from the major storage vendors and storage appliance suppliers. </p> <div class="mw-heading mw-heading2"><h2 id="U.2_compared_with_M.2">U.2 compared with M.2</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=U.2&action=edit&section=4" title="Edit section: U.2 compared with M.2"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>U.2 can use 3.3<span class="nowrap"> </span>V, 5<span class="nowrap"> </span>V and 12<span class="nowrap"> </span>V for power,<sup id="cite_ref-enterprisessd_8-0" class="reference"><a href="#cite_note-enterprisessd-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> while M.2 only supports 3.3<span class="nowrap"> </span>V. </p> <div class="mw-heading mw-heading3"><h3 id="As_implemented">As implemented</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=U.2&action=edit&section=5" title="Edit section: As implemented"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>While the U.2 standard does not imply a form factor of the device that uses it, in practice U.2 is used only on 2.5" SSDs. 2.5" drives are physically larger than M.2 drives and thus typically have larger capacities. </p> <div class="mw-heading mw-heading2"><h2 id="U.3">U.3</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=U.2&action=edit&section=6" title="Edit section: U.3"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>U.3 (SFF-TA-1001) is built on the U.2 spec and uses the same SFF-8639 connector. A single "tri-mode" (PCIe/SATA/SAS) backplane receptacle can handle all three types of connections; the controller automatically detects the type of connection used. This is unlike U.2, where users need to use separate controllers for SATA/SAS and NVMe. U.3 devices are required to be backwards-compatible with U.2 hosts. U.2 devices are not compatible and cannot be used with U.3 hosts.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </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=U.2&action=edit&section=7" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Enterprise_and_Data_Center_Standard_Form_Factor" title="Enterprise and Data Center Standard Form Factor">EDSFF</a> – U.2 successor</li> <li><a href="/wiki/Hard_disk_drive" title="Hard disk drive">Hard disk drive</a></li> <li><a href="/wiki/M.2" title="M.2">M.2</a></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=U.2&action=edit&section=8" 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"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</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="CITEREFBurke" class="citation web cs1">Burke, Steve. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230515181847/https://www.gamersnexus.net/guides/2405-u2-vs-m2-vs-sata-express-best-for-ssds">"U.2 vs. M.2 vs. SATA Express Interface Comparison & Speeds"</a>. <i>Gamers Nexus</i>. Archived from <a rel="nofollow" class="external text" href="https://www.gamersnexus.net/guides/2405-u2-vs-m2-vs-sata-express-best-for-ssds">the original</a> on 15 May 2023<span class="reference-accessdate">. Retrieved <span class="nowrap">13 January</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Gamers+Nexus&rft.atitle=U.2+vs.+M.2+vs.+SATA+Express+Interface+Comparison+%26+Speeds&rft.aulast=Burke&rft.aufirst=Steve&rft_id=https%3A%2F%2Fwww.gamersnexus.net%2Fguides%2F2405-u2-vs-m2-vs-sata-express-best-for-ssds&rfr_id=info%3Asid%2Fen.wikipedia.org%3AU.2" 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"><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.ssdformfactor.org/docs/SSD_Form_Factor_Version1_00.pdf">"Enterprise SSD Form Factor version 1.0"</a> <span class="cs1-format">(PDF)</span>. <i>SSD Form Factor Working Group</i>. 20 December 2011.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=SSD+Form+Factor+Working+Group&rft.atitle=Enterprise+SSD+Form+Factor+version+1.0&rft.date=2011-12-20&rft_id=http%3A%2F%2Fwww.ssdformfactor.org%2Fdocs%2FSSD_Form_Factor_Version1_00.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AU.2" class="Z3988"></span></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 news cs1"><a rel="nofollow" class="external text" href="http://www.tomshardware.com/news/sff-8639-u.2-pcie-ssd-nvme,29321.html">"SFFWG Renames PCIe SSD SFF-8639 Connector To U.2"</a>. <i>Tom's Hardware</i>. 2015-06-05<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-07-16</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Tom%27s+Hardware&rft.atitle=SFFWG+Renames+PCIe+SSD+SFF-8639+Connector+To+U.2&rft.date=2015-06-05&rft_id=http%3A%2F%2Fwww.tomshardware.com%2Fnews%2Fsff-8639-u.2-pcie-ssd-nvme%2C29321.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AU.2" 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://web.archive.org/web/20160506155202/http://www.ssdformfactor.org/docs/SSD_Form_Factor_Version1_a.pdf#page=48">"Figure 37: Pin usage across Existing standards"</a> <span class="cs1-format">(PDF)</span>. Archived from <a rel="nofollow" class="external text" href="http://www.ssdformfactor.org/docs/SSD_Form_Factor_Version1_a.pdf#page=48">the original</a> <span class="cs1-format">(PDF)</span> on 2016-05-06<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-07-16</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Figure+37%3A+Pin+usage+across+Existing+standards&rft_id=http%3A%2F%2Fwww.ssdformfactor.org%2Fdocs%2FSSD_Form_Factor_Version1_a.pdf%23page%3D48&rfr_id=info%3Asid%2Fen.wikipedia.org%3AU.2" 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="http://pinoutguide.com/HD/U.2_SATA_connector_pinout.shtml">"U.2 connector pinout"</a>. <i>PinoutGuide.com</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=PinoutGuide.com&rft.atitle=U.2+connector+pinout&rft_id=http%3A%2F%2Fpinoutguide.com%2FHD%2FU.2_SATA_connector_pinout.shtml&rfr_id=info%3Asid%2Fen.wikipedia.org%3AU.2" 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 news cs1"><a rel="nofollow" class="external text" href="http://techreport.com/news/30251/intel-bridges-the-u-2-gap-with-an-m-2-cable-for-its-750-series-ssd">"Intel bridges the U.2 gap with an M.2 cable for its 750 Series SSD"</a>. <i>The Tech Report</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2017-07-16</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Tech+Report&rft.atitle=Intel+bridges+the+U.2+gap+with+an+M.2+cable+for+its+750+Series+SSD&rft_id=http%3A%2F%2Ftechreport.com%2Fnews%2F30251%2Fintel-bridges-the-u-2-gap-with-an-m-2-cable-for-its-750-series-ssd&rfr_id=info%3Asid%2Fen.wikipedia.org%3AU.2" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</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="http://www.trustedreviews.com/intel-ssd-750-review">"Intel SSD 750 Review"</a>. <i>TrustedReviews</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2017-07-16</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=TrustedReviews&rft.atitle=Intel+SSD+750+Review&rft_id=http%3A%2F%2Fwww.trustedreviews.com%2Fintel-ssd-750-review&rfr_id=info%3Asid%2Fen.wikipedia.org%3AU.2" class="Z3988"></span></span> </li> <li id="cite_note-enterprisessd-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-enterprisessd_8-0">^</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.ssdformfactor.org/docs/SSD_Form_Factor_Version1_00.pdf">"SSD Form Factor"</a> <span class="cs1-format">(PDF)</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=SSD+Form+Factor&rft_id=http%3A%2F%2Fwww.ssdformfactor.org%2Fdocs%2FSSD_Form_Factor_Version1_00.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AU.2" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFAuthor2020" class="citation web cs1">Author, Guest (6 March 2020). <a rel="nofollow" class="external text" href="https://www.storagereview.com/news/evolving-storage-with-sff-ta-1001-u-3-universal-drive-bays">"Evolving Storage with SFF-TA-1001 (U.3) Universal Drive Bays"</a>. <i>StorageReview.com</i>. <q>Devices that are U.3-based are required to be backwards-compatible with U.2 hosts. [...] Enables U.2- (SFF-8639 Module) or U.3- (SFF-TA-1001) compliant drives to be used in the same storage architecture.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=StorageReview.com&rft.atitle=Evolving+Storage+with+SFF-TA-1001+%28U.3%29+Universal+Drive+Bays&rft.date=2020-03-06&rft.aulast=Author&rft.aufirst=Guest&rft_id=https%3A%2F%2Fwww.storagereview.com%2Fnews%2Fevolving-storage-with-sff-ta-1001-u-3-universal-drive-bays&rfr_id=info%3Asid%2Fen.wikipedia.org%3AU.2" class="Z3988"></span> <span class="cs1-visible-error citation-comment"><code class="cs1-code">{{<a href="/wiki/Template:Cite_web" title="Template:Cite web">cite web</a>}}</code>: </span><span class="cs1-visible-error citation-comment"><code class="cs1-code">|last1=</code> has generic name (<a href="/wiki/Help:CS1_errors#generic_name" title="Help:CS1 errors">help</a>)</span></span> </li> </ol></div></div> <div class="navbox-styles"><style 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.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="Solid-state_drives" style="padding:3px"><table class="nowraplinks hlist 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 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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:Solid-state_drive" title="Template:Solid-state drive"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Solid-state_drive" title="Template talk:Solid-state drive"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Solid-state_drive" title="Special:EditPage/Template:Solid-state drive"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Solid-state_drives" style="font-size:114%;margin:0 4em"><a href="/wiki/Solid-state_drive" title="Solid-state drive">Solid-state drives</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Key terminology</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/Encryption" title="Encryption">Encryption</a></li> <li><a href="/wiki/Error_detection_and_correction" title="Error detection and correction">ECC</a></li> <li><a href="/wiki/Flash_file_system" title="Flash file system">Flash file system</a></li> <li><a href="/wiki/Flash_memory" title="Flash memory">Flash memory</a></li> <li><a href="/wiki/Multi-level_cell" title="Multi-level cell">SLC/MLC</a></li> <li><a href="/wiki/Flash_memory_controller" title="Flash memory controller">Flash memory controller</a></li> <li><a href="/wiki/Garbage_collection_(SSD)" class="mw-redirect" title="Garbage collection (SSD)">Garbage collection</a></li> <li><a href="/wiki/IOPS" title="IOPS">IOPS</a></li> <li><a href="/wiki/Bit_rate" title="Bit rate">MB/s</a></li> <li><a href="/wiki/Flash_memory#Memory_wear" title="Flash memory">Memory wear</a></li> <li><a href="/wiki/Open-channel_SSD" title="Open-channel SSD">Open-channel SSD</a></li> <li><a href="/wiki/Write_amplification#Over-provisioning" title="Write amplification">Over-provisioning</a></li> <li><a href="/wiki/Flash_memory#Read_disturb" title="Flash memory">Read disturb</a></li> <li><a href="/wiki/Write_amplification#Secure_erase" title="Write amplification">Secure erase</a></li> <li><a href="/wiki/Solid-state_storage" title="Solid-state storage">Solid-state storage</a></li> <li><a href="/wiki/Trim_(computing)" title="Trim (computing)">Trim command</a></li> <li><a href="/wiki/Wear_leveling" title="Wear leveling">Wear leveling</a></li> <li><a href="/wiki/Write_amplification" title="Write amplification">Write amplification</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Flash manufacturers</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/Micron_Technology" title="Micron Technology">Micron</a></li> <li><a href="/wiki/Samsung_Electronics" title="Samsung Electronics">Samsung</a></li> <li><a href="/wiki/SK_Hynix" title="SK Hynix">SK Hynix</a> <ul><li>Bought <a href="/wiki/Intel" title="Intel">Intel</a>'s NAND flash SSD business and renamed it Solidigm</li></ul></li> <li>Flash Forward (joint venture between <a href="/wiki/Western_Digital" title="Western Digital">Western Digital</a> and <a href="/wiki/Kioxia" title="Kioxia">Kioxia</a>)</li> <li><a href="/wiki/Yangtze_Memory_Technologies" title="Yangtze Memory Technologies">YMTC</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_flash_memory_controller_manufacturers" title="List of flash memory controller manufacturers">Controllers</a></th><td class="navbox-list-with-group navbox-list navbox-odd" 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%">Captive</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/Western_Digital" title="Western Digital">Western Digital</a> <ul><li><a href="/wiki/SanDisk" title="SanDisk">SanDisk</a></li> <li><a href="/wiki/Fusion-io" title="Fusion-io">Fusion-io</a></li> <li><a href="/wiki/HGST" title="HGST">HGST</a></li> <li><a href="/wiki/STec" title="STec">sTec</a></li></ul></li> <li><a href="/wiki/Kioxia" title="Kioxia">Kioxia</a> <ul><li><a href="/wiki/OCZ" title="OCZ">OCZ</a> (bankrupt, assets sold to Toshiba, which later spun off its SSD and flash business to Kioxia)</li> <li><a href="/wiki/Indilinx" title="Indilinx">Indilinx</a> (bought by OCZ)</li></ul></li> <li><a href="/wiki/Micron_Technology" title="Micron Technology">Micron</a></li> <li><a href="/wiki/Samsung_Electronics" title="Samsung Electronics">Samsung</a></li> <li><a href="/wiki/Seagate_Technology" title="Seagate Technology">Seagate</a> <ul><li><a href="/wiki/SandForce" title="SandForce">SandForce</a></li></ul></li> <li><a href="/wiki/SK_Hynix" title="SK Hynix">SK Hynix</a> <ul><li>Bought <a href="/wiki/Intel" title="Intel">Intel</a>'s NAND flash SSD business including controllers and renamed it Solidigm</li></ul></li> <li><a href="/w/index.php?title=FADU&action=edit&redlink=1" class="new" title="FADU (page does not exist)">FADU</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Independent</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/Greenliant_Systems" title="Greenliant Systems">Greenliant Systems</a></li> <li><a href="/w/index.php?title=Goke_Microelectronics&action=edit&redlink=1" class="new" title="Goke Microelectronics (page does not exist)">Goke</a></li> <li><a href="/wiki/JMicron" title="JMicron">Maxiotek</a></li> <li><a href="/wiki/Marvell_Technology_Group" class="mw-redirect" title="Marvell Technology Group">Marvell</a></li> <li><a href="/wiki/Phison" title="Phison">Phison</a></li> <li><a href="/wiki/PMC-Sierra" title="PMC-Sierra">PMC-Sierra</a></li> <li><a href="/wiki/Silicon_Motion" title="Silicon Motion">SMI</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">SSD manufacturers</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/List_of_solid-state_drive_manufacturers" title="List of solid-state drive manufacturers">List of solid-state drive manufacturers</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Interfaces</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/Advanced_Host_Controller_Interface" title="Advanced Host Controller Interface">Advanced Host Controller Interface</a> (AHCI)</li> <li><a href="/wiki/Fibre_Channel" title="Fibre Channel">Fibre Channel</a> (FC)</li> <li><a href="/wiki/NVM_Express" title="NVM Express">NVM Express</a> (NVMe)</li> <li><a href="/wiki/PCI_Express" title="PCI Express">PCI Express</a> (PCIe)</li> <li><a href="/wiki/SATA_Express" title="SATA Express">SATA Express</a></li> <li><a href="/wiki/Serial_ATA" class="mw-redirect" title="Serial ATA">Serial ATA</a> (SATA)</li> <li><a href="/wiki/Serial_attached_SCSI" class="mw-redirect" title="Serial attached SCSI">Serial attached SCSI</a> (SAS)</li> <li><a href="/wiki/USB" title="USB">Universal Serial Bus</a> (USB)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Configurations</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/Hard_disk_drive#Form_factors" title="Hard disk drive">HDD form factors</a></li> <li><a href="/wiki/MSATA" class="mw-redirect" title="MSATA">mSATA</a></li> <li><a href="/wiki/M.2" title="M.2">M.2</a></li> <li><a href="/wiki/PCI_Express" title="PCI Express">PCI Express</a> <a href="/wiki/Expansion_card" title="Expansion card">expansion card</a></li> <li><a href="/wiki/Thunderbolt_(interface)" title="Thunderbolt (interface)">Thunderbolt</a> <ul><li><a href="/wiki/USB-C" title="USB-C">USB Type-C</a></li></ul></li> <li><a class="mw-selflink selflink">U.2</a></li> <li><a href="/wiki/U.3" class="mw-redirect" title="U.3">U.3</a></li> <li><a href="/wiki/EDSFF" class="mw-redirect" title="EDSFF">EDSFF</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related organizations</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/International_Committee_for_Information_Technology_Standards" title="International Committee for Information Technology Standards">INCITS</a></li> <li><a href="/wiki/JEDEC" title="JEDEC">JEDEC / JC-42, JC-64.8</a></li> <li><a href="/wiki/Open_NAND_Flash_Interface_Working_Group" title="Open NAND Flash Interface Working Group">ONFI</a></li> <li><a href="/wiki/NVM_Express#History" title="NVM Express">NVMHCI Work Group</a></li> <li><a href="/wiki/USB_Implementers_Forum" title="USB Implementers Forum">USB-IF</a></li> <li><a href="/wiki/Serial_ATA_International_Organization" title="Serial ATA International Organization">SATA-IO</a></li> <li><a href="/wiki/Small_Form_Factor_Committee" title="Small Form Factor Committee">SFF Committee</a></li> <li><a href="/wiki/Storage_Networking_Industry_Association" title="Storage Networking Industry Association">SNIA</a></li> <li><a href="/wiki/Solid_state_storage_initiative" class="mw-redirect" title="Solid state storage initiative">SSSI</a></li> <li><a href="/wiki/SCSI" title="SCSI">T10/SCSI</a></li> <li><a href="/wiki/Fibre_Channel" title="Fibre Channel">T11/FC</a></li> <li><a href="/wiki/Parallel_ATA" title="Parallel ATA">T13/ATA</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Category:Solid-state_computer_storage" title="Category:Solid-state computer storage">Category</a></b></li></ul> 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