December 20, 20232 yr I created a new cache pool and am migrating data from the old pool->array and then plan on migrating to the new pool. Moments after I started the Mover I got this: Dec 19 20:40:42 spock kernel: critical medium error, dev sdab, sector 3907733680 op 0x0:(READ) flags 0x0 phys_seg 2 prio class 2 Dec 19 20:40:42 spock kernel: md: disk8 read error, sector=3907733616 Dec 19 20:40:42 spock kernel: md: disk8 read error, sector=3907733624 /dev/sdab is a drive inside the array. SMART shows nothing out of the ordinary, and those are the only log entries (so far) for that drive. I do have a few larger capacity drives on hand that I've been meaning to swap in, so I don't mind replacing that one. Should I go ahead and do that? I've just never seen (to my recollection) a critical "medium" error before. No idea what that could mean. Thanks for reading!
December 20, 20232 yr Author Sure thing. Attached. Edited December 2, 20241 yr by spall Remove attachment
December 20, 20232 yr Community Expert It's logged as a disk problem, run an extended SMART test on disk8
December 21, 20232 yr Author @JorgeB Thanks, as usual, for the feedback. Doing that thing now. Will report back when it finishes sometime in 2027.
December 21, 20232 yr Community Expert Solution If the test passed disk is OK for now, keep monitoring.
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