Hard Drive Failure Rates

Annualized failure rates computed from Backblaze's own published drive telemetry, covering 173 drive models across their data centers. Filter by brand, capacity, or AFR range, click a column header to sort, or click a model for its full history.

Brand
Capacity
AFR range
0.0%27.5%
80 / 80 shown
Brand Model Capacity Drive Count Drive Days Failures AFR
Micron MTFDDAK480TDS 480 GB 4 316 0 0.00%
Micron MTFDDAV240TCB 240 GB 86 7,774 0 0.00%
Seagate ZA250CM10002 250 GB 475 42,444 0 0.00%
WD WDS250G2B0A 250 GB 172 15,530 0 0.00%
HGST HUH721010ALE600 10 TB 20 1,819 0 0.00%
Seagate ZA500CM10003 500 GB 3 273 0 0.00%
Seagate Seagate IronWolf ZA250NM10002 250 GB 201 17,765 0 0.00%
Seagate ST18000NM000J 18 TB 68 6,172 0 0.00%
WD WD5000LPVX 500 GB 38 3,425 0 0.00%
Seagate ST16000NM005G 16 TB 25 2,275 0 0.00%
WD WD5000BPKT 500 GB 7 633 0 0.00%
Toshiba MQ01ABF050M 500 GB 95 8,459 0 0.00%
Toshiba HDWF180 8 TB 49 4,369 0 0.00%
Seagate ST500LM021 500 GB 23 2,002 0 0.00%
Seagate ST500LM012 HN 500 GB 54 4,838 0 0.00%
Samsung Samsung SSD 850 EVO 1TB 1 TB 2 182 0 0.00%
Seagate ZA2000CM10002 2 TB 2 182 0 0.00%
WD WD5000LPCX 500 GB 41 3,301 0 0.00%
Seagate ST14000NM002J 14 TB 25 2,273 0 0.00%
HGST HUS728T8TALE6L4 8 TB 18 1,638 0 0.00%
Toshiba MG11ACA16TE 16 TB 78 5,489 0 0.00%
Seagate ST1000LM024 HN 1 TB 1 50 0 0.00%
Seagate ST12000NM003G 12 TB 28 2,545 0 0.00%
Seagate ZA500CM10002 500 GB 11 950 0 0.00%
Samsung Samsung SSD 860 PRO 2TB 2 TB 3 204 0 0.00%
Seagate ST12000NM0117 12 TB 6 543 0 0.00%
Samsung Samsung SSD 870 EVO 2TB 2 TB 1 91 0 0.00%
Micron MTFDDAV480TCB 480 GB 2 182 0 0.00%
Samsung Samsung SSD 850 PRO 1TB 1 TB 1 91 0 0.00%
Dell SSDSCKKB480G8R 480 GB 1 91 0 0.00%
Dell SSDSCKKB240GZR 240 GB 1 91 0 0.00%
Seagate ST12000NM002H 12 TB 3 230 0 0.00%
Dell DELLBOSS VD 480 GB 431 39,208 0 0.00%
WD Blue SA510 2.5 250GB 250 GB 149 13,042 0 0.00%
Micron MTFDDAK480TGA 480 GB 4 215 0 0.00%
Seagate ZA250CM10003 250 GB 1,077 97,347 0 0.00%
Seagate Seagate SSD 250 GB 98 8,759 0 0.00%
Seagate Seagate FireCuda 120 SSD ZA500GM10001 500 GB 6 529 0 0.00%
Crucial CT250MX500SSD1 250 GB 704 63,155 0 0.00%
Seagate ST14000NM000J 14 TB 497 43,349 0 0.00%
Toshiba MQ01ABF050 500 GB 110 9,466 0 0.00%
Seagate ST10000NM001G 10 TB 28 2,544 0 0.00%
Seagate ST500LM030 500 GB 156 13,910 0 0.00%
Seagate ST8000NM000A 8 TB 239 21,499 0 0.00%
Seagate ST12000NM000J 12 TB 1,079 97,746 0 0.00%
Seagate ST8000DM005 8 TB 21 1,615 0 0.00%
WD WUH722222ALE6L4 22 TB 45,665 4,146,339 63 0.56%
Toshiba MG11ACA24TE 24 TB 9,620 824,903 13 0.57%
Seagate ST16000NM001G 16 TB 35,100 3,162,117 57 0.66%
WD WUH722626ALE6L4 26 TB 7,212 462,366 12 0.95%
Toshiba MG08ACA16TE 16 TB 6,306 568,379 16 1.03%
Toshiba MG08ACA16TA 16 TB 39,932 3,614,263 102 1.03%
Toshiba MG09ACA16TE 16 TB 905 68,429 2 1.07%
WD WUH721414ALE6L4 14 TB 8,635 783,318 23 1.07%
Toshiba MG10ACA20TE 20 TB 25,270 2,117,524 64 1.10%
WD WUH721816ALE6L4 16 TB 26,827 2,432,374 80 1.20%
HGST HUH721212ALE600 12 TB 2,599 236,107 8 1.24%
Seagate ST12000NM001G 12 TB 13,177 1,193,856 44 1.34%
Seagate ST14000NM001G 14 TB 10,498 949,396 39 1.50%
Toshiba MG07ACA14TA 14 TB 37,171 3,368,924 179 1.94%
Toshiba MG07ACA14TEY 14 TB 989 89,164 6 2.46%
Seagate ST8000DM002 8 TB 6,903 563,210 38 2.46%
Seagate ST16000NM000J 16 TB 171 14,221 1 2.57%
Seagate ST12000NM0008 12 TB 18,521 1,671,057 145 3.17%
HGST HUH721212ALE604 12 TB 13,196 1,190,182 110 3.37%
Seagate ST16000NM002J 16 TB 467 42,086 4 3.47%
Seagate ST8000NM0055 8 TB 13,112 1,177,541 112 3.47%
Seagate ST24000NM002H 24 TB 9,631 861,587 82 3.47%
Toshiba MG08ACA16TEY 16 TB 4,857 439,243 46 3.82%
HGST HUH728080ALE600 8 TB 110 9,491 1 3.85%
Seagate ST12000NM0007 12 TB 972 87,496 10 4.17%
WD WUH721816ALE6L0 16 TB 2,970 268,875 32 4.34%
HGST HUH728080ALE604 8 TB 71 6,324 1 5.77%
Seagate ST14000NM0018 14 TB 62 5,582 1 6.54%
HGST HUH721212ALN604 12 TB 9,694 861,297 180 7.63%
Seagate ST14000NM0138 14 TB 1,235 110,410 25 8.27%
Seagate ST10000NM0086 10 TB 965 86,092 23 9.75%
WD WUH722016CLE6L4 16 TB 66 3,630 1 10.05%
Seagate ST16000NM002H 16 TB 33 2,240 1 16.30%
Seagate ST16000NM000G 16 TB 16 1,369 1 26.66%

Cumulative since 2013, across every drive model Backblaze has ever deployed -- including models long since retired from the fleet. Backblaze's own published lifetime report only covers models still active in the current quarter; this one doesn't drop a model just because it's no longer in service.

Brand
Capacity
AFR range
0.0%936.5%
Active year
20132026
173 / 173 shown
Brand Model Capacity Active Years Drive Count Drive Days Failures Lifetime AFR
Seagate ST1000LM024 HN 1 TB 2016–2026 1 3,394 0 0.00%
HGST HUS726040ALN610 4 TB 2023–2024 19 4,334 0 0.00%
Micron MTFDDAV480TDS 480 GB 2023 2 12 0 0.00%
HGST HMS5C4040BLE641 4 TB 2018–2024 1 2,170 0 0.00%
Seagate ST6000DM004 6 TB 2017–2024 3 2,759 0 0.00%
Micron MTFDDAK480TGA 480 GB 2026 4 276 0 0.00%
Seagate ST12000NM002H 12 TB 2026 3 230 0 0.00%
Dell SSDSCKKB240GZR 240 GB 2023–2026 1 1,229 0 0.00%
HGST HUH721010ALE600 10 TB 2018–2026 20 54,583 0 0.00%
Seagate ZA500CM10003 500 GB 2022–2026 3 4,407 0 0.00%
Seagate Seagate IronWolf ZA250NM10002 250 GB 2022–2026 205 171,574 0 0.00%
Samsung Samsung SSD 850 PRO 1TB 1 TB 2025–2026 1 480 0 0.00%
Micron MTFDDAV480TCB 480 GB 2023–2026 2 2,003 0 0.00%
Samsung Samsung SSD 870 EVO 2TB 2 TB 2025–2026 1 437 0 0.00%
Seagate ST16000NM005G 16 TB 2020–2026 26 50,895 0 0.00%
Samsung Samsung SSD 860 PRO 2TB 2 TB 2024–2026 3 1,122 0 0.00%
Seagate ZA500CM10002 500 GB 2018–2026 18 43,821 0 0.00%
Seagate ST12000NM003G 12 TB 2023–2026 29 14,717 0 0.00%
Toshiba MG11ACA16TE 16 TB 2026 78 5,648 0 0.00%
Toshiba HDWE160 6 TB 2017–2024 10 10,436 0 0.00%
Seagate ST6000DM001 6 TB 2016–2024 15 17,479 0 0.00%
WD WD1000FYPS 1 TB 2016–2017 1 20 0 0.00%
WD WD3200AAKS 320 GB 2014–2018 1 1,188 0 0.00%
WD WD5000AAJS 500 GB 2014–2015 1 327 0 0.00%
Hitachi HDT725025VLA380 250 GB 2014–2017 1 1,154 0 0.00%
WD WD5003ABYX 500 GB 2014–2017 2 2,254 0 0.00%
WD WD2500BEVT 250 GB 2014–2017 1 1,140 0 0.00%
WD WD3200LPVX 320 GB 2014–2018 2 1,808 0 0.00%
WD WD15EADS 2 TB 2013 1 139 0 0.00%
WD WD1001FALS 1 TB 2013–2016 2 1,366 0 0.00%
Hitachi HDS5C3030BLE630 3 TB 2013–2017 1 1,415 0 0.00%
Seagate ST1500DL001 2 TB 2013–2015 2 1,314 0 0.00%
WD WD10EARS 1 TB 2013–2017 5 3,442 0 0.00%
WD WD10EALS 1 TB 2013–2016 1 532 0 0.00%
WD WD10EARX 1 TB 2013–2016 3 2,528 0 0.00%
Samsung HD103UJ 1 TB 2013–2014 14 3,710 0 0.00%
WD WD15EARS 2 TB 2013–2016 3 1,279 0 0.00%
Hitachi HDT721010SLA360 1 TB 2013–2014 15 4,159 0 0.00%
Seagate ST1500DM003 2 TB 2013–2015 5 2,827 0 0.00%
Dell DELLBOSS VD 480 GB 2019–2026 437 772,435 3 0.14%
Seagate ST8000NM000A 8 TB 2021–2026 250 306,547 3 0.36%
HGST HMS5C4040BLE640 4 TB 2014–2026 16,349 41,176,381 449 0.40%
Seagate ZA250CM10003 250 GB 2020–2026 1,166 2,118,729 24 0.41%
Toshiba MG11ACA24TE 24 TB 2025–2026 9,630 1,694,377 23 0.49%
WD WDS250G2B0A 250 GB 2021–2026 191 214,832 3 0.51%
Crucial CT250MX500SSD1 250 GB 2021–2026 786 947,141 14 0.54%
WD WUH721414ALE6L4 14 TB 2020–2026 8,872 17,118,941 254 0.54%
WD WUH721816ALE6L4 16 TB 2022–2026 27,309 30,884,788 474 0.56%
HGST HMS5C4040ALE640 4 TB 2013–2026 8,723 16,787,424 260 0.56%
WD WUH722222ALE6L4 22 TB 2023–2026 46,041 26,618,389 423 0.58%
Seagate ST16000NM002J 16 TB 2022–2026 474 594,349 10 0.61%
HGST HUH721212ALE600 12 TB 2019–2026 2,697 6,348,914 110 0.63%
Seagate ST16000NM001G 16 TB 2019–2026 36,031 47,206,825 877 0.68%
Hitachi HDS5C4040ALE630 4 TB 2013–2024 2,837 4,553,797 95 0.76%
Toshiba MG10ACA20TE 20 TB 2023–2026 25,410 9,324,427 201 0.79%
Hitachi HDS5C3030ALA630 3 TB 2013–2018 4,664 6,641,559 150 0.82%
WD WUH722626ALE6L4 26 TB 2025–2026 7,217 736,527 17 0.84%
Seagate ST6000DX000 6 TB 2014–2024 1,939 4,286,129 100 0.85%
Seagate ZA250CM10002 250 GB 2019–2026 571 1,215,709 29 0.87%
Seagate ST12000NM001G 12 TB 2020–2026 13,877 26,287,958 721 1.00%
Toshiba MD04ABA400V 4 TB 2015–2024 150 376,503 11 1.07%
Toshiba MG07ACA14TA 14 TB 2018–2026 39,387 78,348,822 2291 1.07%
Toshiba MG08ACA16TA 16 TB 2020–2026 41,061 41,516,959 1215 1.07%
Toshiba MD04ABA500V 5 TB 2015–2019 47 66,870 2 1.09%
Seagate ST12000NM000J 12 TB 2023–2026 1,116 730,603 22 1.10%
Seagate Seagate SSD 250 GB 2019–2026 109 261,060 8 1.12%
HGST HDS724040ALE640 4 TB 2013–2024 45 63,127 2 1.16%
WD WUH721816ALE6L0 16 TB 2021–2026 3,070 4,931,591 157 1.16%
Toshiba MG08ACA16TE 16 TB 2021–2026 6,665 10,107,131 340 1.23%
Toshiba MG09ACA16TE 16 TB 2024–2026 915 169,812 6 1.29%
HGST HUS728T8TALE6L4 8 TB 2022–2026 20 26,903 1 1.36%
WD WD5000LPCX 500 GB 2016–2026 57 186,848 7 1.37%
Seagate ST14000NM001G 14 TB 2020–2026 11,268 20,964,555 792 1.38%
HGST HUH728080ALE600 8 TB 2015–2026 1,218 3,260,426 125 1.40%
HGST HUS726040ALE610 4 TB 2017–2025 55 77,954 3 1.41%
Seagate ST8000DM002 8 TB 2016–2026 10,320 33,669,509 1414 1.53%
Seagate ST8000DM005 8 TB 2017–2026 27 70,258 3 1.56%
Hitachi HDS722020ALA330 2 TB 2013–2018 4,774 5,306,511 235 1.62%
Seagate ST10000NM001G 10 TB 2021–2026 29 44,412 2 1.64%
Toshiba MG07ACA14TEY 14 TB 2020–2026 1,059 1,324,420 64 1.76%
HGST HUH721212ALE604 12 TB 2020–2026 14,352 25,195,977 1223 1.77%
WD WD5000BPKT 500 GB 2014–2026 24 60,657 3 1.80%
Seagate ST500LM021 500 GB 2019–2026 33 80,252 4 1.82%
Seagate ST14000NM000J 14 TB 2023–2026 514 259,310 13 1.83%
Hitachi HDS723030ALA640 3 TB 2013–2017 1,048 1,429,666 73 1.86%
WD WD40EFRX 4 TB 2014–2019 50 76,828 4 1.90%
Seagate ST8000NM0055 8 TB 2016–2026 15,680 46,294,550 2513 1.98%
Micron MTFDDAV240TCB 240 GB 2020–2026 97 177,381 10 2.06%
Seagate ST12000NM0008 12 TB 2019–2026 21,037 44,664,046 2609 2.13%
Seagate ST16000NM000J 16 TB 2023–2026 183 82,367 5 2.22%
Seagate ST12000NM0007 12 TB 2017–2026 38,843 37,411,954 2303 2.25%
Toshiba MG08ACA16TEY 16 TB 2020–2026 5,352 8,469,736 549 2.37%
HGST HUH721212ALN604 12 TB 2018–2026 11,438 27,765,320 1856 2.44%
Seagate ST4000DM000 4 TB 2013–2025 37,040 80,436,155 5790 2.63%
Seagate ST4000DM004 4 TB 2022–2024 20 13,634 1 2.68%
Hitachi HDS723030BLE640 3 TB 2013–2017 10 13,232 1 2.76%
Seagate ST9320325AS 320 GB 2014–2018 25 36,563 3 3.00%
Seagate ST24000NM002H 24 TB 2024–2026 9,900 3,640,687 302 3.03%
WD WD2500BPVT 250 GB 2014–2018 9 11,572 1 3.15%
Seagate ST18000NM000J 18 TB 2020–2026 79 126,653 11 3.17%
Seagate ST10000NM0086 10 TB 2017–2026 1,304 3,651,634 328 3.28%
Toshiba DT01ACA300 3 TB 2013–2017 60 74,177 7 3.44%
WD WD5000LPVX 500 GB 2014–2026 350 862,568 85 3.60%
WD WD60EFRX 6 TB 2014–2024 499 689,771 72 3.81%
Seagate ST4000DM005 4 TB 2017–2024 90 95,850 11 4.19%
Seagate ST14000NM002J 14 TB 2024–2026 26 8,591 1 4.25%
Seagate ZA2000CM10002 2 TB 2018–2026 4 8,173 1 4.47%
Toshiba HDWF180 8 TB 2018–2026 69 102,050 13 4.65%
WD WD10EACS 1 TB 2013–2017 109 60,951 8 4.79%
WD WD30EFRX 3 TB 2013–2018 1,335 1,271,769 174 4.99%
Seagate ST500LM012 HN 500 GB 2014–2026 807 1,784,298 248 5.07%
Seagate ST33000651AS 3 TB 2013–2018 351 222,587 31 5.08%
Seagate Seagate FireCuda 120 SSD ZA500GM10001 500 GB 2022–2026 7 6,997 1 5.22%
WD Blue SA510 2.5 250GB 250 GB 2022–2026 195 139,196 20 5.24%
HGST HUH728080ALE604 8 TB 2021–2026 98 133,895 21 5.72%
WD WD1600AAJS 160 GB 2014–2019 125 126,941 20 5.75%
Seagate ST14000NM0138 14 TB 2020–2026 1,690 2,876,538 463 5.88%
Seagate ST14000NM0018 14 TB 2020–2026 80 98,607 17 6.29%
WD WD10EADS 1 TB 2013–2017 550 370,505 64 6.30%
WD WD30EZRX 3 TB 2013–2015 500 123,577 22 6.50%
Seagate ST500LM030 500 GB 2018–2026 293 574,870 106 6.73%
Seagate ST3160316AS 160 GB 2014–2019 64 64,817 12 6.76%
Seagate ST9250315AS 250 GB 2014–2019 64 85,136 17 7.29%
WD WD2500AAJS 250 GB 2014–2019 3 4,531 1 8.06%
WD WD20EFRX 2 TB 2014–2017 167 67,422 15 8.12%
Seagate ST16000NM000G 16 TB 2025–2026 17 4,344 1 8.40%
Seagate ST250LM004 HN 250 GB 2014–2019 39 48,480 12 9.04%
WD WD10EADX 1 TB 2013–2017 29 15,597 4 9.36%
Seagate ST31500541AS 2 TB 2013–2018 2,188 1,445,217 397 10.03%
WD WUH722016CLE6L4 16 TB 2026 66 3,630 1 10.05%
Seagate ST4000DX000 4 TB 2013–2017 222 293,560 81 10.07%
Seagate ST32000542AS 2 TB 2013–2015 385 119,309 33 10.10%
Toshiba MQ01ABF050M 500 GB 2017–2026 452 845,214 251 10.84%
Hitachi HDS723020BLA642 2 TB 2013–2016 11 9,620 3 11.38%
Seagate ST3160318AS 160 GB 2014–2019 53 49,199 16 11.87%
Seagate ST4000DM001 4 TB 2017–2018 425 96,119 34 12.91%
WD WD5002ABYS 500 GB 2014–2017 6 5,544 2 13.17%
WD WD3200AAJS 320 GB 2014–2019 6 5,451 2 13.39%
Toshiba MQ01ABF050 500 GB 2016–2026 589 1,046,683 403 14.05%
WD WD3200BEKX 320 GB 2014–2019 14 12,685 5 14.39%
Micron MTFDDAK480TDS 480 GB 2024–2026 5 2,336 1 15.63%
Seagate ST16000NM002H 16 TB 2026 33 2,240 1 16.30%
Seagate ST2000VN000 2 TB 2013–2016 10 4,438 2 16.45%
WD WD30EZRS 3 TB 2013–2014 18 4,424 2 16.50%
Seagate ST2000DM001 2 TB 2013–2014 8 2,114 1 17.27%
Seagate ST12000NM0117 12 TB 2019–2026 30 18,721 9 17.55%
Samsung HD154UI 2 TB 2013–2016 4 1,972 1 18.51%
WD WD800BB 80 GB 2014–2016 56 23,656 12 18.52%
WD WD3200AAJB 320 GB 2014–2016 3 1,930 1 18.91%
Seagate ST31500341AS 2 TB 2013–2016 787 330,431 216 23.86%
WD WD800JB 80 GB 2014–2016 19 10,383 7 24.61%
Seagate ST3000DM001 3 TB 2013–2015 4,707 2,205,148 1708 28.27%
WD WD800LB 80 GB 2014–2016 2 1,155 1 31.60%
WD WD2500AAJB 250 GB 2014–2016 2 1,116 1 32.71%
WD WD800AAJB 80 GB 2014–2016 23 11,018 11 36.44%
Seagate ST3500320AS 500 GB 2014–2017 1 992 1 36.79%
WD WD800AAJS 80 GB 2014–2016 30 14,703 15 37.24%
WD WD1600AAJB 160 GB 2014–2016 9 5,757 6 38.04%
Seagate ST320LT007 320 GB 2014–2019 96 73,030 87 43.48%
WD WD3200BEKT 320 GB 2014–2016 1 782 1 46.67%
WD WD800JD 80 GB 2014–2016 1 763 1 47.84%
Dell SSDSCKKB480G8R 480 GB 2020–2026 6 739 1 49.39%
Seagate ST320005XXXX 2 TB 2013–2015 18 5,032 7 50.77%
WD WD1600BPVT 160 GB 2014–2018 4 2,494 4 58.54%
Seagate ST4000DX002 4 TB 2016–2018 7 2,323 4 62.85%
Seagate ST250LT007 250 GB 2014–2016 9 3,593 8 81.27%
Seagate ST8000DM004 8 TB 2018–2021 7 2,822 7 90.54%
Seagate ST1500DL003 2 TB 2013–2015 116 30,913 90 106.27%
Seagate ST2000DL001 2 TB 2013–2015 12 1,447 5 126.12%
Seagate ST2000DL003 2 TB 2013–2015 17 1,237 8 236.06%
Micron MTFDDAV240TDU 240 GB 2020 2 273 2 267.40%
Samsung Samsung SSD 850 EVO 1TB 1 TB 2018–2026 10 1,326 10 275.26%
WD WD2500JB 250 GB 2014 1 39 1 935.90%