Hi there. I'm trying to use thin provisionned LVM for som eguests, and I'm having a problem. Until now, I use LVM pool with success. Here's my pool definition: <pool type='logical'> <name>data</name> <uuid>7f18e030-9d2d-805e-c65f-d12d0681b0a9</uuid> <capacity unit='bytes'>0</capacity> <allocation unit='bytes'>0</allocation> <available unit='bytes'>0</available> <source> <name>data</name> <format type='lvm2'/> </source> <target> <path>/dev/data</path> <permissions> <mode>0700</mode> <owner>-1</owner> <group>-1</group> </permissions> </target> </pool> Everything is working, until I create a thin privisionned pool like this: lvcreate --thin data/pool -L 50G Now, as soon as this is created, I cannot refresh my pool from libvirt POV: LANG=C_ALL virsh pool-refresh data error: Failed to start pool sys error: erreur interne Child process (/sbin/vgchange -aln vg_gerard) status unexpected: exit status 5 If I remove this LV, everything is working again. I'm using libvirt 0.9.10, the default one in CentOS 6.3 (x86_64). Has anybody managed to get it working ? Is this something fixed in more recent release ? Regards, Daniel -- Daniel Berteaud FIREWALL-SERVICES SARL. Société de Services en Logiciels Libres Technopôle Montesquieu 33650 MARTILLAC Tel : 05 56 64 15 32 Fax : 05 56 64 15 32 Web : http://www.firewall-services.com