On 07/17/2014 03:15 PM, Yuanzhen Gu wrote:
> Hello there,
> 
> I take external disk-only snapshot, but deleted the snapshot by mistaken.
> Is there anyway to reboot the system from backing file instead of
> reinstalled the system again? thanks!

Are you using libvirt? If so, this question is better asked on
libvirt-users@redhat.com; but the short answer is modify your domain XML
to point to the backing file names, then reboot.  If not, then modify
your qemu command line to point to the backing files.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org