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[Qemu-devel] qcow2 corruption - seems to be fixed in kvm-85 and later :-
From: |
Jamie Lokier |
Subject: |
[Qemu-devel] qcow2 corruption - seems to be fixed in kvm-85 and later :-) |
Date: |
Sun, 9 Aug 2009 10:19:43 +0100 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
Hi,
Sometimes it's nice to find a mail with good news.
A while back I reported corruption with qcow2, with the subject
"qcow2 corruption observed, fixed by reverting old change".
I'd noticed that kvm-83 was corrupting a Windows 2k disk image, which
was failing to boot, blue screening quite early.
I found there was a qcow2 bug introduced from kvm-72 to kvm-73, and
another from kvm-76 to kvm-77. Reverting both fixed this symptom.
In order to check the bug later, I kept a copy of the disk image which
blue screened.
It still crashes with kvm-84. The release notes indicate there were
some qcow2 fixes in that version; they were not enough to fix this
problem.
There were more qcow2 fixes in kvm-85.
Happily, I can now report that kvm-85 and kvm-88 both boot this image
with no apparent problems, and I will be deleting this junk disk image
now that I'm confident no further testing is required :-)
Thanks!
-- Jamie
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