New answers tagged software-raid
The stupid and time consuming method: For each disk, assemble the RAID with that disk missing, and mount it. Compare all the files of those mounts; if you find any difference in any of the files, that's your mismatch. Do this in a rescue system, where your RAID is not running. To make sure no changes are made to the RAID members themselves, create ...
In the case of raid5, there is no alternate data; it simply means the checksum does not match. Write repair to /sys/block/md0/md/sync_action to scan the array and recompute any mismatching checksums.
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