[libvirt] Creating external snapshots with logical volumes.

Hi, I've already asked this question on the libvirt-users mailing list but got no answer. I think because the answer to my question is not obvious. I hope I get some help here... Currently, for making backups of my guests, I use external snapshots like this: A) virsh snapshot-create-as --domain PCVIRTdra --disk-only --atomic --quiesce --no-metadata --diskspec vda,file=/srv/poolVMS/PCVIRTdra-ONDERHOUD If I wanted to use a logical volume as destination behind the '--diskspec' option, can I do this like this? B) virsh snapshot-create-as --domain PCVIRTdra --disk-only --atomic --quiesce --no-metadata --diskspec vda,file=/dev/CmsrvVH3-vg/PCVIRTdra-ONDERHOUD I got the hit from libvirt itself. If I create a snapshot with command A and the diskspec file already exists, libvirt gives me an error like: " external snapshot file for disk vda already exists and is not a block device: /srv/poolVMS/PCVIRTdra-ONDERHOUD" So the 'and is not a block device' gave me the idea to use a logical volume instead of a file It seems to work, but if this is never intended to be used like this, I would rather not... I ask this question because it seems libvirt is actually recognizing the logical volume as a file if I use command B: root@CmsrvVH3:~# virsh domblklist PCVIRTdra --details Type Device Target Source ------------------------------------------------ file disk vda /dev/CmsrvVH3-vg/PCVIRTdra-ONDERHOUD file cdrom hdb /srv/poolVMS/Windows10_x64.iso file cdrom hdc /srv/poolVMS/virtiodrivers.iso Is this intentional? Is there a better way of doing this? Thanks in advance, Dominique.