By the end of September 2021, Backblaze had 194,749 drives across four data centres on two continents.<\/p>\n
3,537 of these were boot drives, while the remaining 191,212 were data drives. All of the data drives were hard drives.<\/p>\n
For its evaluation of hard drive performance, Backblaze removed 386 drives from consideration that were used for testing or for which it did not have at least 60 units.<\/p>\n
That left it with 190,826 drives for its Q3 2021 quarterly report.<\/p>\n
Backblaze measured the reliability of these drives by using an annualised failure rate (AFR) for each drive.<\/p>\n
This is calculated using the number of drive failures relative to the number of active drive days for each disk.<\/p>\n
The only drive model that recorded no failures during that quarter was the HGST 12TB drive (model: HUH721212ALE600) from Western Digital, which is used in Backblaze’s Dell storage servers in its Amsterdam data centre.<\/p>\n
Five drive models monitored by Backblaze each recorded a single failure during the quarter. These were as follows:<\/p>\n Backblaze said while one failure was good, the number of drive days for each of these drives was 100,256 or less in the quarter.<\/p>\n “This leads to a wide confidence interval for the annualized failure rate (AFR) for these drives,” Backblaze stated.<\/p>\n “Still, kudos to the Seagate 6TB drives (average age 77.8 months) and Toshiba 4TB drives (average age 75.6 months) as they have been good for a long time.”<\/p>\n Backblaze said two particular 12TB and 14TB drives from Seagate were seeing higher failure rates than predicted.<\/p>\n “As noted in the Q2 Drive Stats report, these drives, while manufactured by Seagate, were provisioned in Dell storage servers,” Backblaze said.<\/p>\n “Seagate and Dell were looking into the possible causes for the unexpected failure rate.”<\/p>\n “The limited number of failures, 26 this quarter, have made failure analysis challenging.”<\/p>\n The most reliable hard drives monitored by Backblaze during Q3 2021 are listed in the table below.<\/p>\n These are the most reliable hard drives in the world, according to the latest analysis by cloud storage provider Backblaze.<\/p>\n","protected":false},"author":341042,"featured_media":427248,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[23339,75056,75058,35,31226,75054,57520,6070,28190,733,2118],"class_list":["post-426880","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hardware","tag-backblaze","tag-best-hard-drives","tag-hard-disk-drives-hdds","tag-headline","tag-hgst","tag-most-reliable-hard-drives","tag-reliable-hard-drives","tag-seagate","tag-solid-state-drive-ssd","tag-toshiba","tag-western-digital"],"_links":{"self":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/426880"}],"collection":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/users\/341042"}],"replies":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/comments?post=426880"}],"version-history":[{"count":0,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/426880\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/media\/427248"}],"wp:attachment":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/media?parent=426880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/categories?post=426880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/tags?post=426880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/mybroadband.co.za\/news\/wp-content\/uploads\/2021\/12\/WD-Ultrastar-DC-HC520-.jpg\")
<\/a><\/p>\n\n
![\"Hard](\"https:\/\/mybroadband.co.za\/news\/wp-content\/uploads\/2015\/10\/Hard-drive.jpg\")
<\/a><\/p>\nQ3 2021 failure rates<\/h3>\n
\n\n
\n \nModel<\/th>\n Drives<\/th>\n Drive Days<\/th>\n Failures<\/th>\n Failure Rate<\/th>\n<\/tr>\n<\/thead>\n \n 4TB Hard Drives<\/strong><\/td>\n<\/tr>\n \n HGST HMS5C4040BLE640<\/strong><\/td>\n 12,735<\/td>\n 1,170,611<\/td>\n 6<\/td>\n 0.19%<\/strong><\/td>\n<\/tr>\n \n HGST HMS5C4040ALE640<\/strong><\/td>\n 3,341<\/td>\n 303,035<\/td>\n 4<\/td>\n 0.48%<\/strong><\/td>\n<\/tr>\n \n Seagate ST4000DM000<\/strong><\/td>\n 18,704<\/td>\n 1,724,626<\/td>\n 87<\/td>\n 1.84%<\/strong><\/td>\n<\/tr>\n \n Toshiba MD04ABA400V<\/strong><\/td>\n 97<\/td>\n 8,973<\/td>\n 1<\/td>\n 4.07%<\/strong><\/td>\n<\/tr>\n \n 6TB Hard Drives<\/strong><\/td>\n<\/tr>\n \n Seagate ST6000DX000<\/strong><\/td>\n 886<\/td>\n 81,512<\/td>\n 1<\/td>\n 0.45%<\/strong><\/td>\n<\/tr>\n \n 8TB Hard Drives<\/strong><\/td>\n<\/tr>\n \n HGST HUH728080ALE600<\/strong><\/td>\n 1,109<\/td>\n 100,256<\/td>\n 1<\/td>\n 0.36%<\/strong><\/td>\n<\/tr>\n \n Seagate ST8000DM002<\/strong><\/td>\n 9,731<\/td>\n 895,281<\/td>\n 42<\/td>\n 1.71%<\/strong><\/td>\n<\/tr>\n \n Seagate ST8000NM0055<\/strong><\/td>\n 14,367<\/td>\n 1,323,645<\/td>\n 76<\/td>\n 2.10%<\/strong><\/td>\n<\/tr>\n \n 10TB Hard Drives<\/strong><\/td>\n<\/tr>\n \n Seagate ST10000NM0086<\/strong><\/td>\n 1,194<\/td>\n 110,054<\/td>\n 9<\/td>\n 2.98%<\/strong><\/td>\n<\/tr>\n \n 12TB Hard Drives<\/strong><\/td>\n<\/tr>\n \n HGST HUH721212ALE600<\/strong><\/td>\n 2,600<\/td>\n 239,148<\/td>\n 0<\/td>\n 0.00%<\/strong><\/td>\n<\/tr>\n \n HGST HUH721212ALE604<\/strong><\/td>\n 11,964<\/td>\n 1,034,634<\/td>\n 8<\/td>\n 0.28%<\/strong><\/td>\n<\/tr>\n \n HGST HUH721212ALN604<\/strong><\/td>\n 10,829<\/td>\n 996,553<\/td>\n 14<\/td>\n 0.51%<\/strong><\/td>\n<\/tr>\n \n Seagate ST12000NM001G<\/strong><\/td>\n 11,996<\/td>\n 1,056,012<\/td>\n 21<\/td>\n 0.73%<\/strong><\/td>\n<\/tr>\n \n Seagate ST12000NM0008<\/strong><\/td>\n 20,269<\/td>\n 1,867,447<\/td>\n 67<\/td>\n 1.31%<\/strong><\/td>\n<\/tr>\n \n Seagate ST12000NM0007<\/strong><\/td>\n 1,473<\/td>\n 216,486<\/td>\n 30<\/td>\n 5.06%<\/strong><\/td>\n<\/tr>\n \n 14TB Hard Drives<\/strong><\/td>\n<\/tr>\n \n WDC WUH721414ALE6L4<\/strong><\/td>\n 8,402<\/td>\n 760,005<\/td>\n 8<\/td>\n 0.38%<\/strong><\/td>\n<\/tr>\n \n Toshiba MG07ACA14TA<\/strong><\/td>\n 37,967<\/td>\n 3,202,092<\/td>\n 68<\/td>\n 0.78%<\/strong><\/td>\n<\/tr>\n \n Seagate ST14000NM001G<\/strong><\/td>\n 10,752<\/td>\n 925,925<\/td>\n 20<\/td>\n 0.79%<\/strong><\/td>\n<\/tr>\n \n Toshiba MG07ACA14TEY<\/strong><\/td>\n 447<\/td>\n 40,128<\/td>\n 1<\/td>\n 0.91%<\/strong><\/td>\n<\/tr>\n \n Seagate ST14000NM0138<\/strong><\/td>\n 1,630<\/td>\n 150,955<\/td>\n 26<\/td>\n 6.29%<\/strong><\/td>\n<\/tr>\n \n 16TB Hard Drives<\/strong><\/td>\n<\/tr>\n \n WDC WUH721816ALE6LO<\/strong><\/td>\n 1,040<\/td>\n 82,264<\/td>\n 1<\/td>\n 0.44%<\/strong><\/td>\n<\/tr>\n \n Toshiba MG08ACA16TEY<\/strong><\/td>\n 2,054<\/td>\n 172,675<\/td>\n 5<\/td>\n 1.06%<\/strong><\/td>\n<\/tr>\n \n Seagate ST16000NM001G<\/strong><\/td>\n 6,059<\/td>\n 534,590<\/td>\n 17<\/td>\n 1.16%<\/strong><\/td>\n<\/tr>\n \n Toshiba MG08ACA16TE<\/strong><\/td>\n 1,198<\/td>\n 34,523<\/td>\n 2<\/td>\n 2.11%<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n Now read: Western Digital launches first 20TB hard drives<\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"