An AFR of 10.56% for HDDs and solely 0.58% for SSDs.
For years, the web storage firm Backblaze has analyzed the reliability of the hundreds of arduous drives in its information facilities. For the primary time, the corporate additionally checked out SSDs: it delivers attention-grabbing statistics evaluating the reliability of arduous drives and SSDs. These present that the latter are far more dependable than the previous. Certainly, in the course of the first quarter which has simply handed, the corporate experiences an AFR (Annualized failure price) of 10.56% for HDDs in opposition to solely 0.58% for SSDs.
Backblaze says it doesn’t but use an SSD to retailer buyer information, however has relied on SSDs as “boot drives” for its servers for simply over two years now. Furthermore, within the press launch, the agency explains that lowering them to “boot drives” is considerably improper: “In our case, describing these drives as boot drives is an inappropriate time period, as they’re additionally used to retailer log recordsdata for system entry, diagnostics and extra. In different phrases, these boot disks frequently learn, write and delete recordsdata, along with their main operate of beginning a server ”.
AFR down for the fourth consecutive quarter
After all, the values reported above are restricted to SSDs and HDDs that act as boot drives. Thus, of the 1,518 SSDs enumerated, solely 2 introduced a defect in the course of the quarter. For arduous drives, 44 failures occurred in a pool of 1669 drives. Properly, of their protection, HDDs have labored longer and have a a lot increased common age: 49.6 months in opposition to 12.7 months for SDDs. As well as, over an extended interval (2013), the AFR of HDDs drops to six.04% and that of SSDs rises to 0.64%.
Blackblaze additionally offered statistics for 171,919 arduous drives deployed within the servers. In comparison with these of the primary quarter of 2019, the AFR is down, because it was 1.56% for all HDDs; nevertheless, it’s only 0.85% right here. That is apparently a elementary development based on Backblaze. Andy Klein writes “The general annualized default price (AFR) of 0.85% for the quarter is the fourth consecutive quarter the place the AFR is lower than 1%; a development with which we’re very happy, particularly since we have now added greater than 42,000 new arduous drives to our fleet […]. “
Supply : BackBlaze