![]() At the end of their lifetime, the manufacturer’s discs have an AFR value of 1.39%, compared to 1.40% last year. Seagates tend to be cheaper and still cost effective with absolute failure rates for backblaze. Of all the manufacturers, Seagate solutions showed the most failures and Toshiba the fewest. In comparison, 16TB drives at 13.3 months show only 0.86% of failures.Ĭomparison of annual failure rate by manufacturer with Q1. The correlation between drive age and probability of failure is supported by statistics: 4TB drives with an average age of 81.1 months have a 1.70% failure rate, while 8GB models with a lifetime of 67.8 months have a failure rate of 1.36% have. Almost half, 44.5% of all drive failures in 2022 were 4TB, 6TB, 8TB and 10TB models – they fail more often because they last longer, even though they are accounted for only 28.7% of the working days.Ĭomparison of annual failure rates by drive size The highest AFR rates fell on the HGST Ultrastar He8 8TB (HUH728080ALE604) and Seagate Exos X14 14TB (ST14000NM0138) models – 5.27% and 5.70%, respectively. Backblaze attributed this to the age of the drives – as expected, drives are more prone to failure as they age. The average annual default rate (AFR) has increased over the past three years: in 2020 it was 0.93%, in 2021 – 1.10% and 2022 – 1.37%. Furthermore, these HDDs were mainly used as replacements for other failed 8TB drives. The “star” of Backblaze was the Seagate Exos 8 TB model (ST8000NM000A), which did not show a single failure in 2022, but there is one nuance: only 79 units of this model are in service, while some others are represented by tens of thousands. A total of 230,921 disks remained for analysis, which can be considered an excellent sample. The report concerns only the latter, although 388 instances had to be excluded from their count that either belonged to test models or represented a sample of fewer than 60 units for the model. As of December 2022, Backblaze servers had 235,608 hard drives, of which 4,299 were boot drives and 231,309 were data drives.
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