rootfs crash

["Jogi Hofmüller" <jogi@mur.at>]

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Dear all,

Yesterday the rootfs on my laptop crashed.  So far all attempts to fix
it have failed;  hence I am looking for some help (if possible).

I was creating a copy of a virtual machine (kvm) on my laptop and
started modifying the machine from the inside (installing new packages),
when the laptop froze.  Rebooting failed because /dev/sda3 (the rootfs)
could not be mounted anymore.

Some of the errors were

btrfs: failed to read log tree
btrfs: open_ctree failed

Recovery using a Debian/Testing boot stick (kernel 3.10.2, btrfs-tools
v0.20-rc1) were unsuccessful so far.  After btrfs-zero-log the device
was still not mountable.  Mount attempts fail with i/o erros now.

btrfs restore manages to restore some files from /boot/grub but then
fails with

failed to inflate: -6
and
failed to inflate: -8
and
*** Error in `btrfs': free(): invalid next size
(normal):0x0000000000c0e650 ***

The filesystem is setup as raid1 on devices sda3 and sdb3 using lzo
compression.  There are subvolumes for /home and /var.

Images created with btrfs-image are available from before and after
btrfs-zero-log was run.  I can make them available if needed.

Any hints appreciated!

Regards,
-- 
j.hofmüller                                http://users.mur.at/thesix/


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