Hello. What it the difference in external snapshot configuration with and without <domainsnapshot> ? What is the difference between vda and vdb in the following example? (From https://libvirt.org/formatsnapshot.html) <domainsnapshot> ... <memory snapshot='no'/> <disks> <disk name='vda' snapshot='external'> <driver type='qcow2'/> <source file='/path/vda-delta.qcow2'/> </disk> <disk name='vdb' snapshot='no'/> </disks> <domain> ... <devices> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/path/vda-img.qcow2'/> <target dev='vda' bus='virtio'/> </disk> <disk type='file' device='disk' snapshot='external'> <driver name='qemu' type='raw'/> <source file='/path/vdb-img.qcow2'/> <backingStore type='file'> <format type='qcow2'/> <source file='/path/vdb-delta.qcow2'/> </backingStore> <target dev='vdb' bus='virtio'/> </disk> ... </devices> </domain> </domainsnapshot> -- sergio.