On Fri, Nov 11, 2022 at 2:01 AM <to...@tuxteam.de> wrote: > > On Fri, Nov 11, 2022 at 07:15:07AM +0100, hw wrote: > > On Thu, 2022-11-10 at 23:05 -0500, Michael Stone wrote: >... Here's a report > by folks who do lots of HDDs and SDDs: > > https://www.backblaze.com/blog/backblaze-hard-drive-stats-q1-2021/ > > The gist, for disks playing similar roles (they don't use yet SSDs for bulk > storage, because of the costs): 2/1518 failures for SSDs, 44/1669 for HDDs.
Forgive my ignorance... Isn't Mean Time Before Failure (MTFB) the interesting statistic? When selecting hardware, like HDD vs SSD, you don't know if and when a failure is going to occur. You can only estimate failures using MTBF. After the installation and with failure data in hand, you can check if the MTBF estimate is accurate. I expect most of the HDD and SSD failures to fall within 1 standard deviation of the reported MTBF. And you will have some data points that show failure before MTBF, and some data points that show failure after MTBF. Jeff
