A report ``Backblaze Drive Stats for Q3 2022'' that shows which HDD is fragile with more than 220,000 failure rate data, useful for selecting a highly reliable HDD
About the failure rate of about 220,000 HDDs managed by
Backblaze Drive Stats for Q3 2022
https://www.backblaze.com/blog/backblaze-drive-stats-for-q3-2022/
Of the 226,697 HDDs used for data storage in the third quarter of 2022, 226,309 were analyzed, excluding those used for testing purposes. The breakdown is in the table below, where 'MFG' is the manufacturer of the HDD, 'Model' is the model name, 'Drive Size' is the capacity, 'Drive Count' is the number of units in operation, 'Avg.Age' is the average number of months of life, ' 'Drive Days' is the cumulative number of operating days, 'Drive Failures' is the number of failures, and 'AFR' is the failure rate.
In the third quarter of 2022, the failure rate was zero for HGST's 8TB model HUH728080ALE604, Seagate's 8TB model ST8000NM000A, and Western Digital's 16TB model WUH721816ALE6L0. In particular, HUH728080ALE604 had zero failures for two consecutive quarters. Also, Seagate's 8TB model ST8000NM000A and 16GB model ST16000NM002J are newly introduced, and neither seems to have enough data yet.
The overall failure rate for Q3 2022 was 1.64%, up from 1.46% in Q2 and 1.10% in the same period last year. This is related to overall drive aging, and failure rates are expected to drop in 2023 as older HDDs are retired and replaced. In particular, Seagate's 4TB model ST4000DM000, 6TB model ST6000DX000, and Toshiba's 4TB model MD04ABA400V have seen an increase in failure rate since the second quarter of 2022 (April to June), indicating that HDDs are approaching the end of their life. About. Backblaze expects that the spindle, actuator, and disk body may be worn out after 7 years of operation.
Below is a graph showing Backblaze's HDD manufacturer adoption rate in the third quarter from 2017 to 2022. Blue is HGST, green is Seagate, purple is Toshiba, and red is Western Digital. The percentage of HDDs made by HGST is almost flat, but the percentage of HDDs made by Seagate, which boasted an overwhelming share, is gradually decreasing, and instead, it can be seen that Toshiba HDDs and Western Digital HDDs are increasing. increase.
Furthermore, the table below summarizes the lifetime failure rate from April 2013 to September 2022. The overall HDD lifetime failure rate was 1.41%, slightly higher than 1.39% in the second quarter of the same year, but lower than 1.45% in the same period last year. Confidence Interval represents the reliability of data, and if the difference between Low (lower limit) and High (upper limit) is 1% or more, there is not enough data or it is difficult to predict with data.
Below is a table summarizing only the models where the difference between the upper and lower limits of reliability is less than 1%. Backblaze says, 'These models are the HDDs that have shown solid reliability in our environment so far.'
As for why we continue to buy HDDs with the same storage capacity that are more expensive and have a higher failure rate, Backblaze said, ``Backblaze's cloud storage Backblaze Vault architecture is designed assuming drive failure.'' `` By studying data such as HDD statistics, to learn the relationship between cost and HDD failure'.
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in Hardware, Posted by log1i_yk