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[Qemu-devel] [Bug 984953] Re: qemu-img alters (breaks) disk image conten
From: |
Volker Grabsch |
Subject: |
[Qemu-devel] [Bug 984953] Re: qemu-img alters (breaks) disk image content when converting to VDI |
Date: |
Wed, 18 Apr 2012 14:30:23 -0000 |
** Attachment added: "Example disk image that triggers the bug"
https://bugs.launchpad.net/bugs/984953/+attachment/3089614/+files/test-2M-2.raw.bz2
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https://bugs.launchpad.net/bugs/984953
Title:
qemu-img alters (breaks) disk image content when converting to VDI
Status in QEMU:
New
Bug description:
When using "qemu-img convert" to create a VDI image, the VDI image is
valid, but may contain an altered disk image. When such an image is
run under VirtualBox, subtle bugs such as spontaneous segmentation
faults happen because of broken system libraries.
The following set of commands reproduces the bug (using the provided
test disk image slice):
bunzip2 < test-2M-2.raw.bz2 > test.raw
qemu-img convert -O vdi test.raw test-2.vdi
qemu-img convert -O raw test-2.vdi test-2.raw
diff -qs test.raw test-2.raw
# Output: Files test.raw and test-2.raw differ
If the VDI image is created via "VBoxManage convertfromraw",
everything is okay:
VBoxManage convertfromraw test.raw test-3.vdi --format VDI 2>/dev/null
qemu-img convert -O raw test-3.vdi test-3.raw
diff -qs test.raw test-3.raw
# Output: Files test.raw and test-3.raw are identical
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