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

On Tue, Feb 14, 2017 at 12:07 AM, Gianluca Cecchi < gianluca.cecchi(a)gmail.com&gt; wrote: > 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)?? > Hi Gianluca, This is possible for thin disks. With thin disk we have some overhead for qcow2 metadata, which can be up to 10% in the worst case. So when doing operations on thin disk, we may enlarge it to the virtual size * 1.1, which is 33G for 30G disk. Can you share the output of this commands? (If the vm is running, you should skip the lvchange commands) lvchange -ay 5ed04196-87f1-480e-9fee-9dd450a3b53b/9af3574d-dc83-485f- b906-0970ad09b660he qemu-img check /dev/5ed04196-87f1-480e-9fee-9dd450a3b53b/9af3574d-dc83- 485f-b906-0970ad09b660he lvchange -an 5ed04196-87f1-480e-9fee-9dd450a3b53b/9af3574d-dc83-485f- b906-0970ad09b660he Nir > >