New data released by cloud storage company Backblaze shows that its SSD failure rate is almost as high as that of a hard disk drive (HDD).exist A recent blog post, Backblaze explained its drive analysis of SSDs and HDDs, which revolved around actual use in a real-time environment. The company uses SMART statistics to check the health of the drive. Backblaze stated that it does not know why the failure rate of its SSDs is so high at this time.
In order to analyze drive failures, Backblaze defines drive failures as complete failures or imminent drive failures. To predict the latter, Backblaze uses the drive’s internal SMART statistics, record read error rate, SSD wear leveling, power-on time, total number of program failures, etc.
To make the analysis more useful, Backblaze only analyzed the boot drive in its storage server, not the primary storage drive. From starting the server to reading, writing, and deleting files, the boot drive is used almost uninterruptedly, so there is very little idle time.
Since 2018, Backblaze has used a combination of SSD and hard drives as the boot drive in its servers, making the company a perfect candidate for this type of test.
In the first table, Backblaze shows the lifetime SSD and HDD failure rates starting in 2013. You can see that the failure rate of HDD is significantly higher than that of SSD, which makes us think that SSD is indeed much more durable than HDD, as we have always said.
However, this has some problems, mainly the aging of the drive. Backblaze only started installing SSDs in 2018. But the company’s hard drive health data goes back to 2013, which has a big impact on the results.
After considering the age of the drive and balancing between SSD and HDD, we can see that the results have changed significantly. The failure rate of SSDs does not lag behind that of hard drives, with an annual failure rate of 1.05% and an annual failure rate of 1.38%.
Backblaze doesn’t know why the decline of SSDs is so large, but the data does show that SSDs are not as resilient as we once imagined-to clarify, these SSDs completely failed, not because they maximized the drive’s write endurance Sex, but only from general use.
Backblaze also pointed out that due to hard disk aging (most of which were installed around 2014), its hard disk failure rate increased significantly from 2018 to 2020 (before stabilizing in 2021). This means that once Backblaze’s SSDs are a few years old, SSDs may suffer the same fate. But only time will tell whether this is true.
At present, it is not clear why these SSDs often fail, especially when the SSD has no moving parts. It is not clear what brand and model of SSD Backblaze uses. Some may have budget controllers and/or NAND flash, or there may be other factors at play.
As companies use SSDs to obtain more long-term data, the situation may also become clearer. But no matter what the cause of the drive failure is, this is a good reminder to always back up your storage drive, or use a RAID array with redundancy, whether your drive uses rotating platters or non-removable NAND.