This is fixed by commit a3548077062dd9dc2701ebffd931ba6eaef40bec which
is included in 1.3 release of qemu.
** Changed in: qemu
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/1071236
Title:
creating qcow2 image with preallocation fails if size >=4G
Status in QEMU:
Fix Released
Bug description:
Steps to reproduce:
1. run> qemu-img create -f qcow2 -o cluster_size=512,preallocation=metadata
disk.img 4G
Reproducible:
Always
Configuration:
Gentoo Linux 3.4.9, 64b
latest qemu available from portage (afaik this is pulled from the git repo)
Possible workarounds:
1. ommit preallocation=
2. increase cluster_size
3. reduce the image size
Although workarounds are available, it is still a bug that could (and
should) be fixed.
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