On 4/3/19 9:44 AM, Lentes, Bernd wrote: > Hi, > > i can store the disk of a guest in a plain partition which isn't formatted. > That's no problem, i did it already several times, although the promised speed increase didn't appear. > > But is it possible to create from such a guest a snapshot in a .sn file using virsh ? It is possible to create an external snapshot (an internal one is not possible, unless you stored the guest disk as qcow2 format embedded inside the partition rather than directly as raw format). Note that when you create an external snapshot, the partition becomes a read-only point in time (no further updates to that partition), and your new file.sn qcow2 wrapper file created by the snapshot operation stores all subsequent guest writes. (Well, unless you decide to do a commit operation to push the changes from the overlay back into the base file and get rid of the overlay) -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org
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