On Thu, May 03, 2012 at 03:18:01PM +0000, Yo'av Moshe wrote: > Hey, > > When I try to mount my Btrfs filesystem it fails and this shows up on dmesg: > > device fsid 97727502-a678-4ed1-a96c-409b852d76bf devid 1 transid > 135714 /dev/sda4 > btrfs: enabling auto recoveryparent transid verify failed on > 216925220864 wanted 135714 found 135713 > parent transid verify failed on 216925220864 wanted 135714 found 135713 > parent transid verify failed on 216925220864 wanted 135714 found 135713 > btrfs: open_ctree failed > > Using the latest btrfs-progs, btrfsck and btrfs-debug-tree gives this: > > parent transid verify failed on 216925220864 wanted 135714 found 135713 > parent transid verify failed on 216925220864 wanted 135714 found 135713 > parent transid verify failed on 216925220864 wanted 135714 found 135713 > parent transid verify failed on 216925220864 wanted 135714 found 135713 > Ignoring transid failure > btrfsck: root-tree.c:46: btrfs_find_last_root: Assertion > `!(path->slots[0] == 0)' failed. > > I also couldn't find anything valid using btrfs-select-super. > > This is find-root's output: > http://pastebin.com/KycgzhaP > > Is there anything else I can try? > > I'm using kernel 3.2 on Ubuntu 12.04. In approximate order: * Try a 3.3 or 3.4-rc5 kernel. I don't think those will do anything to fix this particular issue, but it's worth a try. * You have the last-but-one generation listed by find-root: Well block 216926195712 seems great, but generation doesn't match, have=135713, want=135714 so you can use the restore tool[1] with that block number (and -t) to copy off any data that you need that isn't backed up. * There's btrfsck --repair, which may do something to fix it in-place, but may not (or may damage your filesystem more) * And, of course, there's your backups that you can restore from. Hugo. [1] http://btrfs.ipv5.de/index.php?title=Restore -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- emacs: Eats Memory and Crashes. ---
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