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add hatnote mentioning the other "UFS", as requested on talk page.
linked technical term; added info about rewrite cycle life per hatnote request, and removed hatnote; added formation of UFSA per update hatnote request - can't find much more to flesh out, so I removed the hatnote; added notable devices; moved history to new history section; moved compatible revision down; sourced info; filled in bare refs; removed primary source
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{{Use dmy dates|date=September 2015}}
{{Use dmy dates|date=September 2015}}
{{short description|Flash storage specification}}
{{short description|Flash storage specification}}
{{missing information|rewrite cycle life|date=July 2020}}
{{Distinguish|text = the [[Unix File System]], a file system implementation in some Unix and BSD operating systems with the same abbreviation}}
{{Distinguish|text = the [[Unix File System]], a file system implementation in some Unix and BSD operating systems with the same abbreviation}}
'''Universal Flash Storage''', officially abbreviated as '''UFS''', is a [[flash storage]] specification for [[digital camera]]s, [[mobile phone]]s and [[consumer electronic]] devices.<ref>{{cite web |url=http://www.pcworld.com/article/id,137200-c,unresolvedtechstandards/article.html |archiveurl=https://web.archive.org/web/20080209210001/http://www.pcworld.com/article/id,137200-c,unresolvedtechstandards/article.html |archivedate=9 February 2008 |work=PC World |title=Nokia, Others Back Mobile Memory Standard}}</ref><ref>[http://www.jedec.org/news/pressreleases/jedec-announces-publication-universal-flash-storage-ufs-standard JEDEC Announces Publication of Universal Flash Storage (UFS) Standard]</ref> It aims to bring higher [[data transfer]] speed and increased reliability to flash memory storage, while reducing market confusion and removing the need for different adapters for different types of card.<ref>{{cite news|last=Malykhina|first=Elena|title=Mobile Tech Companies Work On Flash Memory Standard|url=http://www.informationweek.com/mobile-tech-companies-work-on-flash-memo/201806565 |url-status=dead |archive-url=https://web.archive.org/web/20120912190317/http://www.informationweek.com/mobile-tech-companies-work-on-flash-memo/201806565 |archive-date=12 September 2012|accessdate=19 September 2012|newspaper=Information Week|date=14 September 2007}}</ref>
'''Universal Flash Storage''', officially abbreviated as '''UFS''', is a [[flash storage]] specification for [[digital camera]]s, [[mobile phone]]s and [[consumer electronic]] devices.<ref>{{cite web |url=http://www.pcworld.com/article/id,137200-c,unresolvedtechstandards/article.html |archiveurl=https://web.archive.org/web/20080209210001/http://www.pcworld.com/article/id,137200-c,unresolvedtechstandards/article.html |archivedate=9 February 2008 |work=PC World |title=Nokia, Others Back Mobile Memory Standard}}</ref><ref>[http://www.jedec.org/news/pressreleases/jedec-announces-publication-universal-flash-storage-ufs-standard JEDEC Announces Publication of Universal Flash Storage (UFS) Standard]</ref> It was designed to bring higher [[data transfer]] speed and increased reliability to flash memory storage, while reducing market confusion and removing the need for different adapters for different types of card.<ref>{{cite news|last=Malykhina|first=Elena|title=Mobile Tech Companies Work On Flash Memory Standard|url=http://www.informationweek.com/mobile-tech-companies-work-on-flash-memo/201806565 |url-status=dead |archive-url=https://web.archive.org/web/20120912190317/http://www.informationweek.com/mobile-tech-companies-work-on-flash-memo/201806565 |archive-date=12 September 2012|accessdate=19 September 2012|newspaper=Information Week|date=14 September 2007}}</ref>


==Overview==
==Overview==
⚫
UFS uses [[Flash memory#NAND flash|NAND flash]]. It may use [[Three-dimensional integrated circuit|multiple stacked]] 3D TLC NAND flash [[die (integrated circuit)|dies]] (integrated circuits) with an integrated controller.<ref>{{cite web|url=https://www.anandtech.com/show/13891/toshiba-samples-ufs-3-storage |title=Toshiba Begins to Sample UFS 3.0 Drives: 96L 3D TLC NAND, Up to 2.9 GB/s |website=Anandtech |date=2019-01-23 |accessdate=2020-08-18}}</ref>
{{Update|section|reason=Missing information and history about ''Universal Flash Storage Association''. Companies listed here in the line ''"..supported by leading firms in the consumer electronics industry..."'' is missing the current UFSA members list|updated=February 2020|date=March 2020}}
⚫
The proposed [[flash memory]] specification is supported by leading firms in the consumer electronics industry such as [[Nokia]], [[Sony Ericsson]], [[Texas Instruments]], [[STMicroelectronics]], [[Samsung]], [[Micron Technology|Micron]], [[SK Hynix]].<ref>{{cite news|last=Modine|first=Austin|title=Flash memory makers propose common card|url=http://www.channelregister.co.uk/2007/09/14/flash_memory_makers_propose_ufs/|accessdate=19 September 2012|newspaper=The Channel|date=14 September 2007}}</ref> UFS is positioned as a replacement for [[eMMC]]s and [[Secure Digital|SD cards]]. The electrical interface for UFS uses the [[M-PHY]],<ref>{{Cite web |url=http://www.mipi.org/about-mipi/industry-associations/jedec-solid-state-technology-association/ |title=Archived copy |access-date=15 August 2011 |archive-url=https://web.archive.org/web/20110928215748/http://www.mipi.org/about-mipi/industry-associations/jedec-solid-state-technology-association |archive-date=28 September 2011 |url-status=dead |df=dmy-all }}</ref> developed by the [[MIPI Alliance]], a high-speed serial interface targeting 2.9&nbsp;Gbit/s per lane with up-scalability to 5.8&nbsp;Gbit/s per lane.<ref>http://www.mipi.org/</ref><ref>{{Cite web |url=http://toshiba.semicon-storage.com/eu/application/ufs.html |title=Archived copy |access-date=26 October 2015 |archive-url=https://web.archive.org/web/20151222124341/http://toshiba.semicon-storage.com/eu/application/ufs.html |archive-date=22 December 2015 |url-status=dead }}</ref> UFS implements a full-duplex serial [[LVDS]] interface that scales better to higher bandwidths than the 8-lane parallel interface of eMMCs. Unlike eMMC, Universal Flash Storage is based on the [[SCSI architectural model]] and supports [[Tagged Command Queuing|SCSI Tagged Command Queuing]].<ref>http://global.samsungtomorrow.com/emmc-to-ufs-how-nand-memory-for-mobile-products-is-evolving/</ref><ref>http://www.design-reuse.com/articles/30845/universal-flash-storage-mobilize-your-data.html</ref>


⚫
The proposed [[flash memory]] specification is supported by consumer electronics companies such as [[Nokia]], [[Sony Ericsson]], [[Texas Instruments]], [[STMicroelectronics]], [[Samsung]], [[Micron Technology|Micron]], [[SK Hynix]].<ref>{{cite news|last=Modine|first=Austin|title=Flash memory makers propose common card|url=http://www.channelregister.co.uk/2007/09/14/flash_memory_makers_propose_ufs/|accessdate=19 September 2012|newspaper=The Channel|date=14 September 2007}}</ref> UFS is positioned as a replacement for [[eMMC]]s and [[Secure Digital|SD cards]]. The electrical interface for UFS uses the [[M-PHY]],<ref>{{Cite web |url=http://www.mipi.org/about-mipi/industry-associations/jedec-solid-state-technology-association/ |title=Archived copy |access-date=15 August 2011 |archive-url=https://web.archive.org/web/20110928215748/http://www.mipi.org/about-mipi/industry-associations/jedec-solid-state-technology-association |archive-date=28 September 2011 |url-status=dead |df=dmy-all }}</ref> developed by the [[MIPI Alliance]], a high-speed serial interface targeting 2.9&nbsp;Gbit/s per lane with up-scalability to 5.8&nbsp;Gbit/s per lane.<ref>http://www.mipi.org/</ref><ref>{{Cite web |url=http://toshiba.semicon-storage.com/eu/application/ufs.html |title=Archived copy |access-date=26 October 2015 |archive-url=https://web.archive.org/web/20151222124341/http://toshiba.semicon-storage.com/eu/application/ufs.html |archive-date=22 December 2015 |url-status=dead }}</ref> UFS implements a full-duplex serial [[LVDS]] interface that scales better to higher bandwidths than the 8-lane parallel interface of eMMCs. Unlike eMMC, Universal Flash Storage is based on the [[SCSI architectural model]] and supports [[Tagged Command Queuing|SCSI Tagged Command Queuing]].<ref>{{cite web|url=http://www.design-reuse.com/articles/30845/universal-flash-storage-mobilize-your-data.html |title=Universal Flash Storage: Mobilize Your Data |website=Design Reuse |date= |accessdate=2020-08-18}}</ref> The standard is developed by, and available from, the [[JEDEC Solid State Technology Association]].
⚫
The standard is developed by, and available from, the [[JEDEC Solid State Technology Association]]. In September 2013, JEDEC published JESD220B UFS 2.0 (update to UFS v1.1 standard published in June 2012). JESD220B Universal Flash Storage v2.0 offers increased link bandwidth for performance improvement, a security features extension and additional power saving features over the UFS v1.1.


The [[Linux kernel]] supports UFS.<ref>https://www.kernel.org/doc/Documentation/scsi/ufs.txt</ref>
The [[Linux kernel]] supports UFS.<ref>https://www.kernel.org/doc/Documentation/scsi/ufs.txt</ref>

==History==
In 2010, the Universal Flash Storage Association (UFSA) was founded as an open Trade Association to promote the UFS standard.<ref>{{cite web|url= https://www.crunchbase.com/organization/universal-flash-storage-association|title=Organization: Universal Flash Storage Association|website=Crunchbase |date= |accessdate=2020-08-18}}</ref>

⚫
In September 2013, JEDEC published JESD220B UFS 2.0 (update to UFS v1.1 standard published in June 2012). JESD220B Universal Flash Storage v2.0 offers increased link bandwidth for performance improvement, a security features extension and additional power saving features over the UFS v1.1.


On 30 January 2018 JEDEC published version 3.0 of the UFS standard, with a higher 11.6 Gbit/s data rate per lane (1450 MB/s) with the use of MIPI M-PHY v4.1 and UniProSM v1.8. At the [[Mobile World Congress|MWC]] 2018, [[Samsung]] unveiled embedded UFS ('''eUFS''') v3.0 and uMCP solutions.<ref>{{cite web|title=Evolving Mobile Solutions: Samsung at MWC 2018 {{!}} Samsung Semiconductor Global Website|url=http://www.samsung.com/semiconductor/insights/news-events/evolving-mobile-solutions-samsung-at-mwc-2018/|website=www.samsung.com|language=en}}</ref><ref>{{cite web|title=eUFS {{!}} Samsung Semiconductor Global Website|url=http://www.samsung.com/semiconductor/estorage/eufs/|website=www.samsung.com|language=en}}</ref><ref>{{cite web|title=Samsung Starts Producing First 512-Gigabyte Universal Flash Storage for Next-Generation Mobile Devices {{!}} Samsung Semiconductor Global Website|url=http://www.samsung.com/semiconductor/insights/news-events/samsung-starts-producing-first-512-gigabyte-universal-flash-storage-for-next-generation-mobile-devices/|website=www.samsung.com|language=en}}</ref>
On 30 January 2018 JEDEC published version 3.0 of the UFS standard, with a higher 11.6 Gbit/s data rate per lane (1450 MB/s) with the use of MIPI M-PHY v4.1 and UniProSM v1.8. At the [[Mobile World Congress|MWC]] 2018, [[Samsung]] unveiled embedded UFS ('''eUFS''') v3.0 and uMCP solutions.<ref>{{cite web|title=Evolving Mobile Solutions: Samsung at MWC 2018 {{!}} Samsung Semiconductor Global Website|url=http://www.samsung.com/semiconductor/insights/news-events/evolving-mobile-solutions-samsung-at-mwc-2018/|website=www.samsung.com|language=en}}</ref><ref>{{cite web|title=eUFS {{!}} Samsung Semiconductor Global Website|url=http://www.samsung.com/semiconductor/estorage/eufs/|website=www.samsung.com|language=en}}</ref><ref>{{cite web|title=Samsung Starts Producing First 512-Gigabyte Universal Flash Storage for Next-Generation Mobile Devices {{!}} Samsung Semiconductor Global Website|url=http://www.samsung.com/semiconductor/insights/news-events/samsung-starts-producing-first-512-gigabyte-universal-flash-storage-for-next-generation-mobile-devices/|website=www.samsung.com|language=en}}</ref>
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On 30 January 2020 JEDEC published version 3.1 of the UFS standard.<ref>{{Cite web|url=https://www.jedec.org/news/pressreleases/jedec-publishes-update-universal-flash-storage-ufs-standard|title=JEDEC Publishes Update to Universal Flash Storage (UFS) Standard {{!}} JEDEC|website=www.jedec.org|language=en|access-date=2020-01-31}}</ref> UFS 3.1 introduces Write Booster, Deep Sleep, Performance Throttling Notification and Host Performance Booster for faster, more power efficient and cheaper UFS solutions. The Host Performance Booster feature is optional.<ref>{{Cite web|url=https://www.anandtech.com/show/15456/faster-cheaper-power-efficient-ufs-storage-ufs-31-spec-published|title=Faster, Cheaper, Power Efficient UFS Storage: UFS 3.1 Spec Published|last=Shilov|first=Anton|website=www.anandtech.com|access-date=2020-02-01}}</ref>
On 30 January 2020 JEDEC published version 3.1 of the UFS standard.<ref>{{Cite web|url=https://www.jedec.org/news/pressreleases/jedec-publishes-update-universal-flash-storage-ufs-standard|title=JEDEC Publishes Update to Universal Flash Storage (UFS) Standard {{!}} JEDEC|website=www.jedec.org|language=en|access-date=2020-01-31}}</ref> UFS 3.1 introduces Write Booster, Deep Sleep, Performance Throttling Notification and Host Performance Booster for faster, more power efficient and cheaper UFS solutions. The Host Performance Booster feature is optional.<ref>{{Cite web|url=https://www.anandtech.com/show/15456/faster-cheaper-power-efficient-ufs-storage-ufs-31-spec-published|title=Faster, Cheaper, Power Efficient UFS Storage: UFS 3.1 Spec Published|last=Shilov|first=Anton|website=www.anandtech.com|access-date=2020-02-01}}</ref>


⚫
==Notable devices==
⚫
UFS uses NAND flash. It may use [[Three-dimensional integrated circuit|multiple stacked]] 3D TLC NAND flash [[die (integrated circuit)|dies]] with an integrated controller. <ref>https://www.anandtech.com/show/13891/toshiba-samples-ufs-3-storage</ref>
In February 2013, semiconductor company Toshiba Memory (now [[Kioxia]]) started shipping samples of a 64GB [[Flash memory#NAND flash|NAND flash]] chip, the first chip to support the then new UFS standard.<ref>{{cite web|url= https://www.pcworld.idg.com.au/article/453256/toshiba_ships_first_nand_flash_chips_faster_transfer_standard/|title=Toshiba ships first NAND flash chips with faster transfer standard |website=PC World |date=2013-02-08 |accessdate=2020-08-18}}</ref>


In April 2015, Samsung's Galaxy S6 family was the first phone to ship using the UFS (Universal Flash Storage) 2.0 standard.<ref>{{cite web|url=https://www.anandtech.com/show/9146/the-samsung-galaxy-s6-and-s6-edge-review/7 |title=The Samsung Galaxy S6 and S6 edge Review |website=Anandtech |date=2015-04-17 |accessdate=2020-08-18}}</ref>
⚫
==Complementary UFS standards==
⚫
On 30 March 2016, JEDEC published version 1.0 of the UFS Card Extension Standard (JESD220-2), which offered many of the features and much of the same functionality as the existing UFS 2.0 embedded device standard, but with additions and modifications for removable cards.<ref>{{Cite web|url=https://www.jedec.org/news/pressreleases/jedec-publishes-universal-flash-storage-ufs-removable-card-standard|title=JEDEC Publishes Universal Flash Storage (UFS) Removable Card Standard {{!}} JEDEC|website=www.jedec.org|access-date=2016-07-07}}</ref>


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On 7 July 2016, Samsung introduced its first UFS cards, in 32, 64, 128, and 256 GB storage capacities.<ref>{{Cite web|url=http://www.anandtech.com/show/10475/samsung-rolls-out-its-first-ufs-cards-ssd-performance-in-card-formfactor|title=Samsung Rolls Out Its First UFS Cards: SSD Performance in Card Form-Factor|last=Shilov|first=Anton|access-date=2016-07-07}}</ref> The cards were based on the UFS 1.0 Card Extension Standard. The 256GB version was reported to offer sequential read performance up to 530 MB/s and sequential write performance up to 170 MB/s and random performance of 40,000 read IOPS and 35,000 write IOPS.
⚫
Also in March 2016, JEDEC published version 1.1 of the UFS Unified Memory Extension (JESD220-1A),<ref>[https://www.jedec.org/document_search?search_api_views_fulltext=jesd220-1a Universal Flash Storage - Unified Memory Extension Version 1.1]</ref> version 2.1 of the UFS Host Controller Interface (UFSHCI) standard (JESD223C),<ref>[http://www.jedec.org/standards-documents/results/jesd223c Universal Flash Storage Host Controller Interface (UFSHCI), Version 2.1]</ref> and version 1.1A of the UFSHCI Unified Memory Extension standard (JESD223-1A).<ref>[https://www.jedec.org/document_search?search_api_views_fulltext=jesd223-1a Universal Flash Storage Host Controller Interface Unified Memory Extension, Version 1.1A]</ref>


On 17 November 2016, [[Qualcomm]] announced the [[Qualcomm Snapdragon|Snapdragon 835]] [[System on a chip|SoC]] with support for UFS 2.1. The Snapdragon 835 also supports SD Card Version 3.0 and USB 3.1 Type-C.<ref>{{cite web|url=https://www.firstpost.com/tech/news-analysis/qualcomm-snapdragon-865-to-sport-lpddr5x-ram-ufs-3-0-will-come-in-2-variants-report-6835011.html |title=Qualcomm Snapdragon 865 to sport LPDDR5X RAM, UFS 3.0, will come in 2 variants: Report |website=First Post |date=2019-06-18 |accessdate=2020-08-18}}</ref>
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On January 30, 2018, the UFS Card Extension standard was updated to version 1.1 (JESD220-2A),<ref>[https://www.jedec.org/standards-documents/docs/jesd220-2 Universal Flash Storage Card Extension, Version 1.1]</ref> and the UFSHCI standard was updated to version 3.0 (JESD223D), to align with UFS version 3.0.<ref>[https://www.jedec.org/standards-documents/focus/flash/universal-flash-storage-ufs Universal Flash Storage (UFS) - JEDEC]</ref>


⚫
On 14 May 2019, OnePlus introduced the OnePlus 7 and OnePlus 7 Pro, the first phones to feature built-in UFS 3.0 (The Galaxy Fold, originally planned to be the first smartphone to feature UFS 3.0 was ultimately delayed after the OnePlus 7's launch).<ref>{{cite web|url=https://www.androidcentral.com/oneplus-7-pro-confirmed-feature-ufs-30-flash-storage |title=OnePlus 7 Pro confirmed to feature UFS 3.0 flash storage |website=Android Central |date=2019-05-06 |accessdate=2020-08-18}}</ref>
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==Notable devices==
⚫
On 7 July 2016, Samsung introduced{{dubious|date=June 2019}} the first UFS cards in 32, 64, 128, and 256 GB storage capacities.<ref>{{Cite web|url=https://news.samsung.com/global/samsung-introduces-worlds-first-universal-flash-storage-ufs-removable-memory-card-line-up-offering-up-to-256-gigabyte-gb-capacity|title=Samsung Introduces World’s First Universal Flash Storage (UFS) Removable Memory Card Line-up, Offering up to 256-Gigabyte (GB) Capacity|website=news.samsung.com|access-date=2016-07-07}}</ref><ref>{{Cite web|url=http://www.anandtech.com/show/10475/samsung-rolls-out-its-first-ufs-cards-ssd-performance-in-card-formfactor|title=Samsung Rolls Out Its First UFS Cards: SSD Performance in Card Form-Factor|last=Shilov|first=Anton|access-date=2016-07-07}}</ref> The cards are based on the UFS 1.0 Card Extension Standard. The 256GB version will offer sequential read performance up to 530 MB/s and sequential write performance up to 170 MB/s and random performance of 40,000 read IOPS and 35,000 write IOPS.

On 17 November 2016, [[Qualcomm]] announced the [[Qualcomm Snapdragon|Snapdragon 835]] [[System on a chip|SoC]] with support for UFS 2.1. The Snapdragon 835 also supports SD Card Version 3.0 and USB 3.1 Type-C.

⚫
On 14 May 2019, OnePlus introduced the OnePlus 7 and OnePlus 7 Pro, the first phones to feature built-in UFS 3.0 (The Galaxy Fold, originally planned to be the first smartphone to feature UFS 3.0 was ultimately delayed after the OnePlus 7's launch).


== Version comparison ==
== Version comparison ==
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UFS 3.0 in Snapdragon 855. Exynos 9820/9825,<ref>{{Cite web|url=https://www.samsung.com/semiconductor/minisite/exynos/products/mobileprocessor/exynos-9-series-9820/|title=Exynos 9 Series 9820 Processor: Specs, Features {{!}} Samsung Exynos|website=Samsung Semiconductor|language=en|access-date=2018-11-14}}</ref> and Kirin 990.<ref>{{Cite web|url=https://www.anandtech.com/show/14851/huawei-announces-kirin-990-and-kirin-990-5g-dual-soc-approach-integrated-5g-modem|title=Huawei Announces Kirin 990 and Kirin 990 5G: Dual SoC Approach, Integrated 5G Modem|last=Cutress|first=Ian|date=September 6, 2019|website=AnandTech|url-status=live|archive-url=https://web.archive.org/web/20190906140013/https://www.anandtech.com/show/14851/huawei-announces-kirin-990-and-kirin-990-5g-dual-soc-approach-integrated-5g-modem|archive-date=September 6, 2019|access-date=}}</ref>
UFS 3.0 in Snapdragon 855. Exynos 9820/9825,<ref>{{Cite web|url=https://www.samsung.com/semiconductor/minisite/exynos/products/mobileprocessor/exynos-9-series-9820/|title=Exynos 9 Series 9820 Processor: Specs, Features {{!}} Samsung Exynos|website=Samsung Semiconductor|language=en|access-date=2018-11-14}}</ref> and Kirin 990.<ref>{{Cite web|url=https://www.anandtech.com/show/14851/huawei-announces-kirin-990-and-kirin-990-5g-dual-soc-approach-integrated-5g-modem|title=Huawei Announces Kirin 990 and Kirin 990 5G: Dual SoC Approach, Integrated 5G Modem|last=Cutress|first=Ian|date=September 6, 2019|website=AnandTech|url-status=live|archive-url=https://web.archive.org/web/20190906140013/https://www.anandtech.com/show/14851/huawei-announces-kirin-990-and-kirin-990-5g-dual-soc-approach-integrated-5g-modem|archive-date=September 6, 2019|access-date=}}</ref>

⚫
==Complementary UFS standards==
⚫
On 30 March 2016, JEDEC published version 1.0 of the UFS Card Extension Standard (JESD220-2), which offered many of the features and much of the same functionality as the existing UFS 2.0 embedded device standard, but with additions and modifications for removable cards.<ref>{{Cite web|url=https://www.jedec.org/news/pressreleases/jedec-publishes-universal-flash-storage-ufs-removable-card-standard|title=JEDEC Publishes Universal Flash Storage (UFS) Removable Card Standard {{!}} JEDEC|website=www.jedec.org|access-date=2016-07-07}}</ref>

⚫
Also in March 2016, JEDEC published version 1.1 of the UFS Unified Memory Extension (JESD220-1A),<ref>[https://www.jedec.org/document_search?search_api_views_fulltext=jesd220-1a Universal Flash Storage - Unified Memory Extension Version 1.1]</ref> version 2.1 of the UFS Host Controller Interface (UFSHCI) standard (JESD223C),<ref>[http://www.jedec.org/standards-documents/results/jesd223c Universal Flash Storage Host Controller Interface (UFSHCI), Version 2.1]</ref> and version 1.1A of the UFSHCI Unified Memory Extension standard (JESD223-1A).<ref>[https://www.jedec.org/document_search?search_api_views_fulltext=jesd223-1a Universal Flash Storage Host Controller Interface Unified Memory Extension, Version 1.1A]</ref>

⚫
On January 30, 2018, the UFS Card Extension standard was updated to version 1.1 (JESD220-2A),<ref>[https://www.jedec.org/standards-documents/docs/jesd220-2 Universal Flash Storage Card Extension, Version 1.1]</ref> and the UFSHCI standard was updated to version 3.0 (JESD223D), to align with UFS version 3.0.<ref>[https://www.jedec.org/standards-documents/focus/flash/universal-flash-storage-ufs Universal Flash Storage (UFS) - JEDEC]</ref>

==Rewrite cycle life==
A UFS drive's rewrite life cycle affects its lifespan. There is a limit to how many write/erase cycles a flash block can accept before it produces errors or fails altogether. Each write/erase cycle causes a flash memory cell's oxide layer to deteriorate. The reliability of a drive is based on three factors: the age of the drive, total terabytes written over time and drive writes per day.<ref>{{cite web|url=https://www.enterprisestorageforum.com/storage-hardware/ssd-lifespan.html |title=SSD Lifespan: How Long Will Your SSD Work? |website=Enterprise Storage Forum |date=2019-03-01 |accessdate=2020-08-18}}</ref>


== See also ==
== See also ==

Revision as of 23:08, 18 August 2020

Not to be confused with the Unix File System, a file system implementation in some Unix and BSD operating systems with the same abbreviation.

Universal Flash Storage, officially abbreviated as UFS, is a flash storage specification for digital cameras, mobile phones and consumer electronic devices.[1][2] It was designed to bring higher data transfer speed and increased reliability to flash memory storage, while reducing market confusion and removing the need for different adapters for different types of card.[3]

Overview

UFS uses NAND flash. It may use multiple stacked 3D TLC NAND flash dies (integrated circuits) with an integrated controller.[4]

The proposed flash memory specification is supported by consumer electronics companies such as Nokia, Sony Ericsson, Texas Instruments, STMicroelectronics, Samsung, Micron, SK Hynix.[5] UFS is positioned as a replacement for eMMCs and SD cards. The electrical interface for UFS uses the M-PHY,[6] developed by the MIPI Alliance, a high-speed serial interface targeting 2.9 Gbit/s per lane with up-scalability to 5.8 Gbit/s per lane.[7][8] UFS implements a full-duplex serial LVDS interface that scales better to higher bandwidths than the 8-lane parallel interface of eMMCs. Unlike eMMC, Universal Flash Storage is based on the SCSI architectural model and supports SCSI Tagged Command Queuing.[9] The standard is developed by, and available from, the JEDEC Solid State Technology Association.

The Linux kernel supports UFS.[10]

History

In 2010, the Universal Flash Storage Association (UFSA) was founded as an open Trade Association to promote the UFS standard.[11]

In September 2013, JEDEC published JESD220B UFS 2.0 (update to UFS v1.1 standard published in June 2012). JESD220B Universal Flash Storage v2.0 offers increased link bandwidth for performance improvement, a security features extension and additional power saving features over the UFS v1.1.

On 30 January 2018 JEDEC published version 3.0 of the UFS standard, with a higher 11.6 Gbit/s data rate per lane (1450 MB/s) with the use of MIPI M-PHY v4.1 and UniProSM v1.8. At the MWC 2018, Samsung unveiled embedded UFS (eUFS) v3.0 and uMCP solutions.[12][13][14]

On 30 January 2020 JEDEC published version 3.1 of the UFS standard.[15] UFS 3.1 introduces Write Booster, Deep Sleep, Performance Throttling Notification and Host Performance Booster for faster, more power efficient and cheaper UFS solutions. The Host Performance Booster feature is optional.[16]

Notable devices

In February 2013, semiconductor company Toshiba Memory (now Kioxia) started shipping samples of a 64GB NAND flash chip, the first chip to support the then new UFS standard.[17]

In April 2015, Samsung's Galaxy S6 family was the first phone to ship using the UFS (Universal Flash Storage) 2.0 standard.[18]

On 7 July 2016, Samsung introduced its first UFS cards, in 32, 64, 128, and 256 GB storage capacities.[19] The cards were based on the UFS 1.0 Card Extension Standard. The 256GB version was reported to offer sequential read performance up to 530 MB/s and sequential write performance up to 170 MB/s and random performance of 40,000 read IOPS and 35,000 write IOPS.

On 17 November 2016, Qualcomm announced the Snapdragon 835 SoC with support for UFS 2.1. The Snapdragon 835 also supports SD Card Version 3.0 and USB 3.1 Type-C.[20]

On 14 May 2019, OnePlus introduced the OnePlus 7 and OnePlus 7 Pro, the first phones to feature built-in UFS 3.0 (The Galaxy Fold, originally planned to be the first smartphone to feature UFS 3.0 was ultimately delayed after the OnePlus 7's launch).[21]

Version comparison

UFS

UFS 1.0 1.1 2.0 2.1 3.0[22][23] 3.1
Introduced 2011-02-24[24] 2012-06-25[25] 2013-09-18[26] 2016-04-04[27] 2018-01-30[28] 2020-01-30[29]
Bandwidth per lane 300 MB/s 600 MB/s 1450 MB/s
Max. number of lanes 1 2
Max. total bandwidth 300 MB/s 1200 MB/s 2900 MB/s
M-PHY version ? ? 3.0 4.1
UniPro version ? ? 1.6 1.8

UFS Card

UFS Card 1.0 1.1 2.0
Introduced 2016-03-30[30] 2018-01-30[28] 2018-09-18[31]
Bandwidth per lane 600 MB/s 1200 MB/s
Max. number of lanes 1
Max. total bandwidth 600 MB/s 1200 MB/s
M-PHY version 3.0 ?
UniPro version 1.6 ?

Implementation

UFS 2.0 in Snapdragon 820 and 821. Kirin 950 and 955. Exynos 7420

UFS 2.1 in Snapdragon 712(710&720G), 730G, 835, 845 and 850. Kirin 960, 970 and 980. Exynos 9609,[32] 9610,[33] 9611,[34] 9810 and 980.[35]

UFS 3.0 in Snapdragon 855. Exynos 9820/9825,[36] and Kirin 990.[37]

Complementary UFS standards

On 30 March 2016, JEDEC published version 1.0 of the UFS Card Extension Standard (JESD220-2), which offered many of the features and much of the same functionality as the existing UFS 2.0 embedded device standard, but with additions and modifications for removable cards.[38]

Also in March 2016, JEDEC published version 1.1 of the UFS Unified Memory Extension (JESD220-1A),[39] version 2.1 of the UFS Host Controller Interface (UFSHCI) standard (JESD223C),[40] and version 1.1A of the UFSHCI Unified Memory Extension standard (JESD223-1A).[41]

On January 30, 2018, the UFS Card Extension standard was updated to version 1.1 (JESD220-2A),[42] and the UFSHCI standard was updated to version 3.0 (JESD223D), to align with UFS version 3.0.[43]

Rewrite cycle life

A UFS drive's rewrite life cycle affects its lifespan. There is a limit to how many write/erase cycles a flash block can accept before it produces errors or fails altogether. Each write/erase cycle causes a flash memory cell's oxide layer to deteriorate. The reliability of a drive is based on three factors: the age of the drive, total terabytes written over time and drive writes per day.[44]

See also

References

  1. ^ "Nokia, Others Back Mobile Memory Standard". PC World. Archived from the original on 9 February 2008.
  2. ^ JEDEC Announces Publication of Universal Flash Storage (UFS) Standard
  3. ^ Malykhina, Elena (14 September 2007). "Mobile Tech Companies Work On Flash Memory Standard". Information Week. Archived from the original on 12 September 2012. Retrieved 19 September 2012.
  4. ^ "Toshiba Begins to Sample UFS 3.0 Drives: 96L 3D TLC NAND, Up to 2.9 GB/s". Anandtech. 23 January 2019. Retrieved 18 August 2020.
  5. ^ Modine, Austin (14 September 2007). "Flash memory makers propose common card". The Channel. Retrieved 19 September 2012.
  6. ^ "Archived copy". Archived from the original on 28 September 2011. Retrieved 15 August 2011.{{cite web}}: CS1 maint: archived copy as title (link)
  7. ^ http://www.mipi.org/
  8. ^ "Archived copy". Archived from the original on 22 December 2015. Retrieved 26 October 2015.{{cite web}}: CS1 maint: archived copy as title (link)
  9. ^ "Universal Flash Storage: Mobilize Your Data". Design Reuse. Retrieved 18 August 2020.
  10. ^ https://www.kernel.org/doc/Documentation/scsi/ufs.txt
  11. ^ "Organization: Universal Flash Storage Association". Crunchbase. Retrieved 18 August 2020.
  12. ^ "Evolving Mobile Solutions: Samsung at MWC 2018 | Samsung Semiconductor Global Website". www.samsung.com.
  13. ^ "eUFS | Samsung Semiconductor Global Website". www.samsung.com.
  14. ^ "Samsung Starts Producing First 512-Gigabyte Universal Flash Storage for Next-Generation Mobile Devices | Samsung Semiconductor Global Website". www.samsung.com.
  15. ^ "JEDEC Publishes Update to Universal Flash Storage (UFS) Standard | JEDEC". www.jedec.org. Retrieved 31 January 2020.
  16. ^ Shilov, Anton. "Faster, Cheaper, Power Efficient UFS Storage: UFS 3.1 Spec Published". www.anandtech.com. Retrieved 1 February 2020.
  17. ^ "Toshiba ships first NAND flash chips with faster transfer standard". PC World. 8 February 2013. Retrieved 18 August 2020.
  18. ^ "The Samsung Galaxy S6 and S6 edge Review". Anandtech. 17 April 2015. Retrieved 18 August 2020.
  19. ^ Shilov, Anton. "Samsung Rolls Out Its First UFS Cards: SSD Performance in Card Form-Factor". Retrieved 7 July 2016.
  20. ^ "Qualcomm Snapdragon 865 to sport LPDDR5X RAM, UFS 3.0, will come in 2 variants: Report". First Post. 18 June 2019. Retrieved 18 August 2020.
  21. ^ "OnePlus 7 Pro confirmed to feature UFS 3.0 flash storage". Android Central. 6 May 2019. Retrieved 18 August 2020.
  22. ^ Cho, HeeChang (August 2016). "Next Generation of Mobile Storage: UFS and UFS Card" (PDF). Jedec.
  23. ^ Chen, Horace (July 2017). "UFS 3.0 Controller Design Considerations" (PDF). Jedec. Archived from the original (PDF) on 7 November 2017.
  24. ^ "JEDEC Announces Publication of Universal Flash Storage (UFS) Standard | JEDEC". www.jedec.org. Retrieved 8 May 2017.
  25. ^ "JEDEC Updates Universal Flash Storage (UFS) Standard | JEDEC". www.jedec.org. Retrieved 8 May 2017.
  26. ^ "JEDEC Publishes Universal Flash Storage (UFS) Standard v2.0 | JEDEC". www.jedec.org. Retrieved 8 May 2017.
  27. ^ "JEDEC Updates Universal Flash Storage (UFS) and Related Standards | JEDEC". www.jedec.org. Retrieved 8 May 2017.
  28. ^ a b "JEDEC Publishes Universal Flash Storage (UFS & UFSHCI) Version 3.0 and UFS Card Extension Version 1.1 | JEDEC". www.jedec.org. Retrieved 31 January 2018.
  29. ^ "JEDEC Publishes Update to Universal Flash Storage (UFS) Standard | JEDEC". www.jedec.org. Retrieved 31 January 2020.
  30. ^ "JEDEC Publishes Universal Flash Storage (UFS) Removable Card Standard | JEDEC". www.jedec.org. Retrieved 30 October 2017.
  31. ^ "JEDEC Publishes Universal Flash Storage (UFS) Standard v2.0 | JEDEC". www.jedec.org. Retrieved 1 February 2020.
  32. ^ "Exynos 9609 Mobile Processor: Specs, Features | Samsung Exynos". Samsung Semiconductor. Retrieved 26 January 2020.
  33. ^ "Exynos 9610 Processor: Specs, Features | Samsung Exynos". Samsung Semiconductor. Retrieved 26 January 2020.
  34. ^ "Exynos 9611 Mobile Processor: Specs, Features | Samsung Exynos". Samsung Semiconductor. Retrieved 26 January 2020.
  35. ^ "Exynos 980 5G Mobile Processor: Specs, Features | Samsung Exynos". Samsung Semiconductor. Retrieved 26 January 2020.
  36. ^ "Exynos 9 Series 9820 Processor: Specs, Features | Samsung Exynos". Samsung Semiconductor. Retrieved 14 November 2018.
  37. ^ Cutress, Ian (6 September 2019). "Huawei Announces Kirin 990 and Kirin 990 5G: Dual SoC Approach, Integrated 5G Modem". AnandTech. Archived from the original on 6 September 2019.
  38. ^ "JEDEC Publishes Universal Flash Storage (UFS) Removable Card Standard | JEDEC". www.jedec.org. Retrieved 7 July 2016.
  39. ^ Universal Flash Storage - Unified Memory Extension Version 1.1
  40. ^ Universal Flash Storage Host Controller Interface (UFSHCI), Version 2.1
  41. ^ Universal Flash Storage Host Controller Interface Unified Memory Extension, Version 1.1A
  42. ^ Universal Flash Storage Card Extension, Version 1.1
  43. ^ Universal Flash Storage (UFS) - JEDEC
  44. ^ "SSD Lifespan: How Long Will Your SSD Work?". Enterprise Storage Forum. 1 March 2019. Retrieved 18 August 2020.
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