It is actually more important to select a particular model than brand, as Seagate ably demonstrates with AFRs of 0.11 and 4.79 per cent on two families. In the end, keep in mind this is not an indication of the general reliability of any specific brand, but it gives us an overview of how different capacities and technologies fare against one another. Backblaze mentioned that 19 drives of this model that failed in Q4 were shipped off for further analysis, and that it’s continuing to follow this process over the coming quarters. On the opposite side there is the 14TB Seagate ‘ST14000NM0138’, which has an AFR of 4.66 per cent in Q4 of 2021, down from 6.29 per cent in the previous quarter.
Perhaps the comparatively limited quantity of just 886 helps in this regard. Seagate’s 6TB ‘ST6000DX000’ is still the most reliable drive in the arsenal, with an AFR of only 0.11%, even though they are 80.4 months old on average. In other words, newer drives are less likely to fail than older ones, which stands to reason. Backblaze Published Hard Drive Stats for Q1 2019 - 06:40 PM As of March 31, 2019, Backblaze had 106,238 spinning hard drives in our cloud storage ecosystem spread across three data centers.
This is thanks to new high-capacity drives that account for 69 per cent of Backblaze‘s active catalogue, whilst only contributing to 57 per cent of the overall failure rate. The report indicates that AFR for all operational drives rose to 1.01 per cent in 2021, up from 0.93 per cent in 2020, although still below the 1.83 per cent of 2019. This week, Backblaze released its quarterly hard drive reliability stats. Being mechanical spinners by nature, SSDs are not taken into account. This report is important as it provides a glimpse into the reliability of hard drives, pitting one manufacturer against another, and Backblaze goes further by breaking down each model into capacity, the number of drives examined, average age, and most importantly, failure. The company uses drives of multiple capacities and ages, from brands such as Seagate, Toshiba, HGST, and WDC, while monitoring each model’s annualised failure rate or AFR, calculated using the following formula. Backblaze, the cloud storage provider, recently published its 2021 annual report about the performance of 202,759 operational hard drives.
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