On 01.10.2013 01:23, Michał Sawicz wrote: > So the nightmare came for me - I've a 7x2TB setup under RAID6, and one > of the drives started showing uncorrectable sectors a few days ago, but > I didn't yet have time to address that. I had two-disk redundancy, after > all... > > Soon thereafter the cables / controller spew a slew of errors and the > array was stopped. A --force --assemble later it was back up, rebuilding > onto 2 spares - I was left with no redundancy. If only the bad sectors > drive was one of those two, everything would be fine. Unfortunately > that's not the case, so I'm now left with an array with read errors. So > it fails during rebuild due to those. > > What I'd like to do first is to make sure the array rebuilds onto the 6 > healthy drives, regardless of the bad blocks, I can probably recover the > data (assuming I can find out which files were affected - any > pointers?), but if the array doesn't rebuild correctly, I'm afraid it's > gonna get worse, and soon. OK, so a ddrescue and --zero-superblock later my array is rebuilding onto one healthy spare. According to ddrescue I only lost some 8kB of data in more or less one chunk, so after the array is rebuilt my next task will be finding which file(s) that was. -- Michał (Saviq) Sawicz <michal@xxxxxxxxxx>
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