On 11/06/2023 14:48, Alexander Motin wrote:
On 11.06.2023 08:02, Graham Perrin wrote:See below, should I begin scrubbing? Or (before I begin) might zdb reveal something useful?The only case when I would not recommend to run scrub is if there is a suspicion of memory corruptions on the system (hardware or software), like a bad RAM, in which case scrub may "find" errors that are not there, trashing the pool even more. Otherwise it just verifies checksums, trying to find valid data copies and update what is affected. It is not an fsck, it does not change things arbitrarily.
Thanks. No suspected memory corruption in this case.I chose to begin scrubbing a few hours ago. I think it likely that the reportedly permanent error will simply disappear when the scrub completes.
zdb … might be looking for a needle in a haystack, when there's zero information about what data is affected by the one data error.
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