Maybe you are right, but i just followed the Suse guide: https://en.opensuse.org/SDB:BTRFS How to repair a broken/unmountable btrfs filesystem
I already tried the commands
mount with the
-o usebackuproot option. (And -o usebackuproot,ro as well)
But they just produce this in dmesg:
[61054.470771] BTRFS info (device sdb1): trying to use backup root at mount
time
[61054.470778] BTRFS info (device sdb1): disk space caching is enabled
[61054.470782] BTRFS info (device sdb1): has skinny extents
[61054.560876] BTRFS error (device sdb1): parent transid verify failed on
29392896 wanted 1486833 found 1486836
[61054.563423] BTRFS error (device sdb1): parent transid verify failed on
29392896 wanted 1486833 found 1486836
[61054.604057] BTRFS error (device sdb1): open_ctree failed
[61079.137435] BTRFS info (device sdb1): trying to use backup root at mount
time
[61079.137443] BTRFS info (device sdb1): disk space caching is enabled
[61079.137445] BTRFS info (device sdb1): has skinny extents
[61079.227242] BTRFS error (device sdb1): parent transid verify failed on
29392896 wanted 1486833 found 1486836
[61079.230087] BTRFS error (device sdb1): parent transid verify failed on
29392896 wanted 1486833 found 1486836
[61079.260062] BTRFS error (device sdb1): open_ctree failed
And on the cli i get the following:
mainframe:~ # mount -o usebackuproot,ro /dev/sdb1 /data
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
A restore does also not help:
mainframe:~ # btrfs restore /dev/sdb1 /mnt
parent transid verify failed on 29392896 wanted 1486833 found 1486836
parent transid verify failed on 29392896 wanted 1486833 found 1486836
parent transid verify failed on 29392896 wanted 1486833 found 1486836
parent transid verify failed on 29392896 wanted 1486833 found 1486836
Ignoring transid failure
parent transid verify failed on 29409280 wanted 1486829 found 1486833
parent transid verify failed on 29409280 wanted 1486829 found 1486833
parent transid verify failed on 29409280 wanted 1486829 found 1486833
parent transid verify failed on 29409280 wanted 1486829 found 1486833
Ignoring transid failure
parent transid verify failed on 29376512 wanted 1327723 found 1486833
parent transid verify failed on 29376512 wanted 1327723 found 1486833
parent transid verify failed on 29376512 wanted 1327723 found 1486833
parent transid verify failed on 29376512 wanted 1327723 found 1486833
Ignoring transid failure
--
Thomas Wurfbaum
Starkertshofen 15
85084 Reichertshofen
Tel.: +49-160-3696336
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