Andy Klein, the author of the evaluation writes about this: "The more data we have, the better, and the older the SSDs get, the more attentive we will be to see how long they last. Thus, the evaluation is not yet set in stone, but gives hints. However, Backblaze warns that the total number of SSDs in use is still relatively small. So, the failure rates are in the same order of magnitude, but the two groups (SSDs and HDDs) are not at the same point in their lifecycle. In comparison, the cumulative AFR (during lifetime) for the HDDs used was 1.40% (according to the 2021 Drive Statistics report). The cumulative AFR was 1.07% for all SSD drives in the fourth quarter of 2021. The evaluation across all SSD drives is interesting. In both cases, the AFR is based on very little data, resulting in a very wide confidence interval, Backblaze writes. In the case of the Seagate hard drive, there were only four drives, one of which failed in early 2021. However, we should not overestimate these data, because in the case of the Crucial there are only 20 drives installed in December 2021. In the table above, two SSD models stand out with extremely high failure rates: The model from Crucial: CT250MX500SSD1 (43.22%) and the model from Seagate: ZA2000CM10002 (28.81%). The AFR value (failure rate) is calculated according to the following formula:ĪFR = (drive failures / (drive days / 365)) * 100 The table above gives the failure rates of SSDs across different models in 2019 to 2021. Every day, a boot drive reads, writes, and deletes files depending on the activity of the storage server itself. The SSDs also store log files and temporary files generated by the storage server. The boot drives in the backblace environment are not only used to boot the storage servers. Since Q4 2018, SSDs have been installed on all new storage servers and on all systems with failed HDD boot drives. The latter post is purely about SSDs, while the 2021 report was about hard drives.Īs of December 31, 2021, Backblaze had 2,200 SSDs in use, with SSDs deployed since Q4 2018. On February 1, 2022, Backblaze published its Backblaze Drive Stats for 2021 report, and then followed it up with a complementary blog post, The SSD Edition: 2021 Drive Stats Review, on March 3, 2022. I came across a corresponding article here the other day. It is interesting to see what the cloud provider Backblaze has to say on the subject. However, many users still have the feeling that solid state disks (SSDs) break down faster. Broken hard drives or SSDs have probably been experienced by everyone involved in the field. He pointed out the drives do more than just boot the servers, they also store log files and temporary files produced by the servers, and so each SSD will read, write, and delete files depending on the activity of the server during the day.Data storage devices can and does fail all the time. In a blog post detailing the latest probing, Backblaze cloud storage evangelist Andy Klein said the SSDs are all used as boot drives in the firm's storage servers, and that Backblaze only began using SSDs this way from Q4 of 2018. The 2021 Drive Stats report was published in February. Backblaze said it will initially publish the SSD edition twice a year, but that this may change depending on how valuable readers find it. The cloud storage and backup provider publishes quarterly and annual Drive Stat reports, which focused exclusively on rotating hard drives until last year. Backblaze has published the first SSD edition of its regular drive statistics report, which appears to show that flash drives are as reliable as spinning disks, although with surprising failure rates for some models.
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