Backblaze’s data does not suggest an AFR of 30-50% or anywhere near that. STH readers were citing mass failures, where half of the storage arrays would fail and be replaced by a different disk. Something was apparent if you read some of the comments on our piece from a few weeks ago. Even Backblaze saw the data and worked with Seagate to phase out this model in 2020. At the same time, it seems notable that these stories keep coming up. We also have more of these drives running perfectly fine so we are in no way saying these drives have some sort of mass failure. Of course, there is a lot more going on here, and these drives were in a much smaller array than what Backblaze uses. We actually did not even think of this when we first saw Backblaze’s data, but we had a reader point out that the model was the same as what we just covered in our recent anecdotal piece.
The Seagate ST12000NM0007 is not always the least reliable drive in every slice of the data, but it is certainly near the top for most of these. When you look at the drive stats for the Seagate Exos X12 ST12000NM0007 you can see a pattern: Seagate Exos X12 In Backblaze 2021 Stats Comparison We took the charts from Backblaze’s 2021 stats.
That drive happens to be in Backblaze’s data as a standout, and not for a good reason. Specifically, we said Farewell Seagate Exos X12 12TB Enterprise Hard Drives that failed next to one another. When they did, we had a number of folks reach out because of a recent feature on STH. This week, Backblaze released its quarterly hard drive reliability stats.
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