[ovirt-users] actual size greater than virtual size?

Hello, I'm on 4.1 with 2 FC SAN storage domains and testing live migration of disk. I started with a CentOS 7.3 VM with a thin provisioned disk of 30Gb. It seems that I can see actual disk size in VM--> Snapshots--> Active VM line and the right sub pane. If I remember correctly before the live storage migration the actual size was 16Gb. But after the migration it shows actual size greater than virtual (33Gb)?? There are no snapshots on the VM right now. Is this true? In case could it depend on temporary snapshots done by th esystem for storage migration? But in this case does it mean that a live merge generates a biggest image at the end..? The command I saw during conversion was: vdsm 17197 2707 3 22:39 ? 00:00:01 /usr/bin/qemu-img convert -p -t none -T none -f qcow2 /rhev/data-center/mnt/blockSD/922b5269-ab56-4c4d-838f-49d33427e2ab/images/6af3dfe5-6da7-48e3-9eb0-1e9596aca9d3/9af3574d-dc83-485f-b906-0970ad09b660 -O qcow2 -o compat=1.1 /rhev/data-center/mnt/blockSD/5ed04196-87f1-480e-9fee-9dd450a3b53b/images/6af3dfe5-6da7-48e3-9eb0-1e9596aca9d3/9af3574d-dc83-485f-b906-0970ad09b660he See currenti situation here: https://drive.google.com/file/d/0BwoPbcrMv8mvMnhib2NCQlJfRVE/view?usp=sha... thanks for clarification, Gianluca