Backblaze's Q417 HDD Reliability Report

The failure error rate by HDD model obtained from 2015 to 2017 is as follows. The error rate of Seagate's ST 6000 DX000 and Western ...

Although, they readily admit for some the sampling size is low, The HGST/Hitachi 4 TB models delivered sub 1.0% failure rates for each of the ...

The count of retries of each spin start attempt after the initial failure. ▫ Only found in some HGST and. Toshiba drives. Failed Drives -. 0.07%.

All failed when over 90% capacity, and all failures were bad blocks / excessive reallocation (that means the drives were still readable, but ...

The hard drive failure rate for the quarter was 1.84%, our lowest quarterly rate ever. · The 10- and 12 TB drive models are new.

HGST's 8TB hard drive had a 0 percent failure rate over 2016 and 2017, whereas 4.93 percent of them failed in 2015. However, only 45 of these ...

If a drive model has a failure rate of 0%, it means there were no drive failures of that model during Q4 2017. There were 62 drives (91,305 ...

“Drive Failures” is the total number of drives that make up “Drive Count” that failed in Q4. “Annualized Failure Rate” (AFR) is “Drive Failures” ...