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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,
143:
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.
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Since then, U.2 has achieved a high level of support from the major storage vendors and storage appliance suppliers.
54:(SSDs) to a computer. It covers the physical connector, electrical characteristics, and communication protocols.
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In
November 2015, Intel introduced the 750 series SSD which is available in both PCI Express and U.2 variants.
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to be hot swappable and to allow legacy SAS and SATA drives to be mixed using the same connector family.
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599:(bankrupt, assets sold to Toshiba, which later spun off its SSD and flash business to Kioxia)
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93:, but provides four PCI Express lanes through a different usage of available pins.
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In June 2015, the SFFWG announced that the connector was being renamed to U.2.
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It was developed for the enterprise market and designed to be used with new
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641:'s NAND flash SSD business including controllers and renamed it Solidigm
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298:"Intel bridges the U.2 gap with an M.2 cable for its 750 Series SSD"
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drives. It uses up to four PCI Express lanes and two SATA lanes.
192:"U.2 vs. M.2 vs. SATA Express Interface Comparison & Speeds"
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Computer interface standard for connecting SSDs to a computer
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89:The U.2 connector is mechanically identical to the
523:'s NAND flash SSD business and renamed it Solidigm
238:"SFFWG Renames PCIe SSD SFF-8639 Connector To U.2"
50:, is a computer interface standard for connecting
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263:"Figure 37: Pin usage across Existing standards"
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217:"Enterprise SSD Form Factor version 1.0"
131:V for power, while M.2 only supports 3.3
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34:
713:List of solid-state drive manufacturers
46:(pronounced 'u-dot-2'), using the port
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528:Flash Forward (joint venture between
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96:U.2 devices may be connected to an
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729:Advanced Host Controller Interface
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959:Peripheral Component Interconnect
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224:SSD Form Factor Working Group
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91:SATA Express device plug
20:Not to be confused with
429:Flash memory controller
100:port using an adapter.
39:SSDs with U.2 interface
969:Computer storage buses
853:JEDEC / JC-42, JC-64.8
322:"Intel SSD 750 Review"
280:"U.2 connector pinout"
40:
841:Related organizations
115:U.2 compared with M.2
38:
770:Universal Serial Bus
764:Serial attached SCSI
27:For other uses, see
949:Computer connectors
498:Flash manufacturers
489:Write amplification
474:Solid-state storage
226:. 20 December 2011.
29:U2 (disambiguation)
663:Greenliant Systems
434:Garbage collection
390:Solid-state drives
61:drives along with
52:solid-state drives
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863:NVMHCI Work Group
706:SSD manufacturers
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459:Over-provisioning
414:Flash file system
346:"SSD Form Factor"
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454:Open-channel SSD
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605:(bought by OCZ)
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397:Key terminology
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302:The Tech Report
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160:Hard disk drive
156:– U.2 successor
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119:U.2 can use 3.3
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805:expansion card
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326:TrustedReviews
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242:Tom's Hardware
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190:Burke, Steve.
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139:As implemented
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878:SFF Committee
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735:Fibre Channel
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484:Wear leveling
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172:(SFF-TA-1001)
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974:SATA Express
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753:SATA Express
479:Trim command
469:Secure erase
464:Read disturb
419:Flash memory
340:
329:. Retrieved
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305:. Retrieved
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246:. Retrieved
244:. 2015-06-05
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199:. Retrieved
196:Gamers Nexus
195:
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104:Availability
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810:Thunderbolt
802:PCI Express
747:PCI Express
741:NVM Express
656:Independent
550:Controllers
449:Memory wear
59:PCI Express
954:Serial ATA
938:Categories
815:USB Type-C
758:Serial ATA
722:Interfaces
688:PMC-Sierra
404:Encryption
331:2017-07-16
307:2017-07-16
248:2017-07-16
201:13 January
177:References
626:SandForce
575:Fusion-io
85:Connector
922:Category
893:T10/SCSI
673:Maxiotek
633:SK Hynix
603:Indilinx
515:SK Hynix
148:See also
127:V and 12
48:SFF-8639
903:T13/ATA
873:SATA-IO
678:Marvell
637:Bought
621:Seagate
616:Samsung
570:SanDisk
558:Captive
519:Bought
510:Samsung
424:SLC/MLC
73:History
898:T11/FC
868:USB-IF
848:INCITS
760:(SATA)
749:(PCIe)
743:(NVMe)
731:(AHCI)
683:Phison
611:Micron
592:Kioxia
534:Kioxia
505:Micron
133:
129:
125:
121:
832:EDSFF
792:mSATA
772:(USB)
766:(SAS)
639:Intel
521:Intel
349:(PDF)
266:(PDF)
220:(PDF)
154:EDSFF
964:SCSI
888:SSSI
883:SNIA
858:ONFI
737:(FC)
668:Goke
647:FADU
585:sTec
580:HGST
540:YMTC
532:and
444:MB/s
439:IOPS
203:2022
123:V, 5
67:SATA
65:and
827:U.3
822:U.2
797:M.2
693:SMI
597:OCZ
409:ECC
170:U.3
165:M.2
135:V.
98:M.2
63:SAS
44:U.2
940::
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22:U2
536:)
382:e
375:t
368:v
351:.
334:.
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31:.
24:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
_form-factor.jpg)