How do I recover a BTRFS filesystem with "parent transid verify failed" errors?

Posted by Evan P. on Ask Ubuntu See other posts from Ask Ubuntu or by Evan P.
Published on 2011-03-03T15:11:52Z Indexed on 2011/03/03 15:33 UTC
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recovery

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btrfs

I've got an external USB disk running btrfs. I use it for backups, and each time I do a backup I take a snapshot.

However, it's giving me this error now:

parent transid verify failed on 109973766144 wanted 1823 found 1821
parent transid verify failed on 109973766144 wanted 1823 found 1821

Obviously, this is a non-critical disk, but I have a few files on here that aren't available elsewhere. Is there any way to recover data from this disk? Maybe by mounting one of the snapshots as root?

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