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Re: [Qemu-devel] qemu-img: Could not open '....qcow2': Could not read sn
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From: |
Kevin Wolf |
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Subject: |
Re: [Qemu-devel] qemu-img: Could not open '....qcow2': Could not read snapshots: File too large |
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Date: |
Mon, 7 Dec 2015 14:24:55 +0100 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
Am 07.12.2015 um 10:07 hat Kis Gellert geschrieben:
> Today one of my virtual machines failed starting.
> Previously , I might made a snapshot while VM running.
Never access disk images from more than one process at the same time
(except if all of them are read-only), it causes corruption. The proper
way of taking a snapshot of a running VM is the qemu monitor (i.e. in
your case through libvirt).
Your best bet for recovering at least some data is using either a
hex editor or tests/qemu-iotests/qcow2.py from the qemu source tree to
update the number of snapshots to 0 and then use qemu-img convert to
copy the data out.
Kevin