On 02/12/2018 22:00, Niklas Hambüchen wrote:
This makes sense. But does it apply here, given the flood of read errors in my dmesg in just a single scrub? The probability for that many errors for a single pass over 3 GB seems very low.
I just thought. Is your scrub a "check" or "repair"? I don't think a check actually rewrites, so failures can accumulate. If a sector becomes unreadable because the magnetism has faded, it will fail repeatedly until it's rewritten. And without a "repair" it won't necessarily be rewritten.
The other thing is, mdadm 3.3 ... I'd upgrade that if I were you. It's got known bugs including problems with mirrors ... I don't think there's any problems with scrubs, though, so it's a "general principles" advice to upgrade, not a "you need to".
Cheers, Wol
