Hi Kyle,
I've just tried both of the options you've suggested, they all fail :-(
btrfsch --repair /dev/sdb6 breaks with:
btrfsck: btrfsck.c:1933: check_owner_ref: Assertion `!(rec-is_root)'
I don't have more success with mount -t btrfs -o recovery command
unfortunately. Here is the output I get:
[ 663.005399] parent transid verify failed on 528974954496 wanted
22723 found 22727
[ 663.005928] btrfs read error corrected: ino 1 off 528974954496 (dev
/dev/sdb6 sector 585363104)
[ 663.005933] btrfs: failed to read tree root on sdb6
[ 663.013985] btrfs: open_ctree failed
Any other clues guys?
2012/7/17 Kyle Gates kylega...@hotmail.com:
Have you tried mounting with the recovery option?
mount -t btrfs -o recovery /dev/sdb6
Did you use the btrfsck repair option?
btrfsck --repair /dev/sdb6
Date: Tue, 17 Jul 2012 07:13:17 -0400
Subject: Unmountable btrfs filesystem
From: providence.sal...@gmail.com
To: linux-btrfs@vger.kernel.org
Hi devs,
I can't mount my btrfs-based external disk. I don't know what happened
to the disk, but usually it gets disconnected (usb cable pulled out)
buy my 8 months old daughter.
Here's the output from dmesg:
[ 299.699543] parent transid verify failed on 528952573952 wanted
22726 found 22728
[ 299.700947] btrfs read error corrected: ino 1 off 528952573952 (dev
/dev/sdb6 sector 585319392)
[ 299.701224] btrfs: open_ctree failed
I then run btrfsck /dev/sdb6 with not much more success at all. The
output is as follows:
Ignoring transid failure
leaf parent key incorrect 528969142272
parent transid verify failed on 528969142272 wanted 22728 found 22726
Ignoring transid failure
leaf parent key incorrect 528969142272
btrfsck: btrfsck.c:1933: check_owner_ref: Assertion `!(rec-is_root)'
failed.
Aborted
My btrfs-progs comes from
repository:
git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git
at the commit: 8935d8436147f86dfbda3d8b8175a77b654b8abc
branch: master
and I'm running linux-3.5_rc7 kernel. (Linux-3.5_rc6 has got the same
mount issue as well)
I tried the btrfs-find-root hint (from
https://btrfs.wiki.kernel.org/index.php/Restore), but since I don't
have the lines starting with Well block n seems great..., I'm
doubtful about which block id to run btrfs-restore -t n with.
Can you help in guys?
Many thanks in advance,
- Providence.
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