Hi,

On 11/29/2013 04:36 AM, Sebastian Ochmann wrote:
Hello everyone,

when I scrubbed one of my btrfs volumes today, the result of the scrub was:

total bytes scrubbed: 1.27TB with 2 errors
error details: super=2
corrected errors: 0, uncorrectable errors: 0, unverified errors: 0
Here super error means superblock checksum mismatch,scrub just report
superblock errors but dosen't try to fix it....

Maybe this is just a read error, anyway, superblocks will be rewritten after commiting
a transaction..

Thanks,
Wang

and dmesg said:

btrfs: bdev /dev/mapper/tray errs: wr 0, rd 0, flush 0, corrupt 0, gen 1
btrfs: bdev /dev/mapper/tray errs: wr 0, rd 0, flush 0, corrupt 0, gen 2

Can someone please enlighten me what these errors mean (especially the "super" and "gen" values)? As an additional info: The drive is sometimes used in a machine with kernel 3.11.6 and sometimes with 3.12.0, could this swapping explain the problem somehow?

Best regards
Sebastian
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