3 ms·
Brian from Backblaze here. Let's call that "DOA Failure rate", where the drive is either dead on arrival, or does not survive the 2 day initial burn in test.
by brianwski 12y ago
Brian from Backblaze here. Let's call that "DOA Failure rate", where the drive is either dead on arrival, or does not survive the 2 day initial burn in test. I'll ask the boots on the ground for more data, but my impression is the 2 day burn in doesn't catch many drive failures, let's say less than 1/2 of 1 percent. We have even proposed skipping it, but we gain confidence the REST of the system is wired up correctly and other components like power supplies also have infant mortality.
- larrys 12y agoVery interesting. It might be an idea to do some post mortems on the failed drives. [1] Why not take apart some failed drives and see what you can find out as to why they failed vs. ones that did not. Perhaps info that might be of interest to the manufacturer but in any case would make an good blog post. Or maybe you can cannibalize and use again. [1] I did an "air crash investigation" on a RC Chopper that had crashed. I found out that a servo failed because a part in it was plastic (a gear) (as opposed to, I think, brass). Consequently the jerky move that I made was enough to cause the plastic gear to loose a tooth and then I lost control.