I am not 100% sure whether this is the right place to raise this issue.
Maybe you can forward this to right person
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I have the feeling this wikipage >>>
http://wiki.qemu.org/Documentation/CreateSnapshot is wrong. I think the
decription and the posted command for creating snapshots [||qemu-img
create -f qcow2 -b centos-cleaninstall.img snapshot.img|] |is actually
describing copy-on-write (or overlay) images. And I think this is not
the same thing
|||As far as I know such a command would creat a copy-on-write image and
not a snapshot|. On the german debianforum.de I got another suggestion
to vreate snaptshots which I have not tested yet, but sounds more likely
to be correct to me
qemu-img snapshot -c [snapshot_name] [base_name]
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