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Adam_a

Backblaze Releases Its 2Q HDD Reliability Results

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An interesting thing to note this time is that the overall annualized failure rate is higher than last quarter but still only 1.97%. Some of the drives had a much higher annualized failure rate this quarter (annualized failure rate is computed by ((Failures)/(Drive Days/365)) * 100). For instance the Seagate ST4000DX000 4TB drive had the highest annualized failure rate at 19.81%, but only 10 drives total failed. The Seagate ST4000DM000 4TB had the overall highest amount of drives fail, at 228, but its annualized failure rate was only 2.66%. There were two drive types that saw no drive failures and therefor resulted in a 0.00% annualized failure rate: the HGST HUH728080ALE600 8TB and the Toshiba MD04ABA400V 4TB. Failure in this study is defined as 1) The drive will not spin up or connect to the OS. 2) The drive will not sync, or stay synced, in a RAID Array. 3) The Smart Stats used show values above Backblaze’s thresholds.

Backblaze Releases Its 2Q HDD Reliability Results

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I always enjoy these stats releases. Wish they'd add more Toshiba and WD drives to the mix to fill out the data. Even if they can't buy the drives 1200 at a time.

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Well they buy based on price, so some models will be excluded if the deals aren't great.

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