[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-discuss] Interruped snapshot deletion leads to corrupted image (qe
[Qemu-discuss] Interruped snapshot deletion leads to corrupted image (qemu-img, qcow2, ERROR OFLAG_COPIED)
Wed, 26 Feb 2014 11:35:08 +0100
I (quickly) wanted to delete a snapshot for one of my VMs. Image format is
a size of 200 GB. VM was turned off. Command issued was:
qemu-img snapshot -d <id> <img>
The amount of data changed between the creation of the snapshot and the current
was roughly 5-10 GB (update of operating system).
It was running for > 10 h when I decided to CTRL-C. Normally snapshot
a lot quicker.
Apparently that was a bad mistake because now the image is corrupted.
Calling 'qemu-img check <img>' yields hundreds (or thousands) of
ERROR OFLAG_COPIED: offset=214e0b4000 refcount=1
with different offsets, of course.
'qemu-img check -r all <img>' finished after a few minutes, but did not improve
situation. Calling 'qemu-img check <img>' still yields tons of errors.
I then tried 'qemu convert <corrupted img> <new img>'. It completed without
after 10-20 minutes.
Unfortunately the new image (raw format) contains loads of errors from the guest
perspective. Neither partition table nor file systems were present. I could
both with the original parameters, but a subsequent fsck.ext3 again gave me so
errors that I don't trust my data's integrity.
Booting a 1:1 copy of the corrupted image gives the same results as booting the
created by 'qemu convert <corrupted img> <new img>'.
The original image was created with an old (couple of years, perhaps?) version
Currently I'm running version qemu-kvm/qemu-img 1.6.2 on openSUSE 13.1 (x86_64).
Now, before I go and restore the backups, is there any way to repair the image?
(And I guess it would be nice to have some sort of progress indicator for
leave alone some sort of transaction logic...)
Any hints are greatly appreciated.
TIA -- Till
|[Prev in Thread]
||[Next in Thread]|
- [Qemu-discuss] Interruped snapshot deletion leads to corrupted image (qemu-img, qcow2, ERROR OFLAG_COPIED),
Till Dörges <=