Hi all, I test libvirt boots QEMU VM from Sheepdog snapshot image by specify snapshot id like following. 1, $ collie vdi list Name Id Size Used Shared Creation time VDI id Copies Tag Alice 1 10 GB 1.3 GB 0.0 MB 2013-02-01 18:59 15d167 2 s testvdi 1 20 MB 20 MB 0.0 MB 2013-02-02 11:45 f348ba 2 name s testvdi 2 20 MB 0.0 MB 20 MB 2013-02-03 17:56 f348bb 2 testvdi 3 20 MB 12 MB 8.0 MB 2013-02-03 17:58 f348bc 2 2, $ cat > sheepdog_vm1.xml <domain type='qemu'> <name>testvm</name> <memory>1048576</memory> <os> <type arch='x86_64'>hvm</type> </os> <devices> <disk type='network'> <source protocol="sheepdog" name="testvdi:1"/> <target dev='hda' bus='ide'/> </disk> <graphics type='vnc' port='-1' autoport='yes'/> </devices> </domain> 3, $ virsh create sheepdog_vm1.xml domain testvm is created ( from sheepdog_vm1.xml） 4, $ virsh destroy testvm domain testvm is deleted 5, $ collie vdi list Name Id Size Used Shared Creation time VDI id Copies Tag Alice 1 10 GB 1.3 GB 0.0 MB 2013-02-01 18:59 15d167 2 s testvdi 1 20 MB 20 MB 0.0 MB 2013-02-02 11:45 f348ba 2 name s testvdi 2 20 MB 0.0 MB 20 MB 2013-02-03 17:56 f348bb 2 s testvdi 3 20 MB 12 MB 8.0 MB 2013-02-03 17:58 f348bc 2 testvdi 4 20 MB 12 MB 8.0 MB 2013-02-04 13:15 f348bd 2 My question is before i boot VM from sheepdog:testvdi:1, my vdi list like Name Id Size Used Shared Creation time VDI id Copies Tag Alice 1 10 GB 1.3 GB 0.0 MB 2013-02-01 18:59 15d167 2 s testvdi 1 20 MB 20 MB 0.0 MB 2013-02-02 11:45 f348ba 2 name s testvdi 2 20 MB 0.0 MB 20 MB 2013-02-03 17:56 f348bb 2 testvdi 3 20 MB 12 MB 8.0 MB 2013-02-03 17:58 f348bc 2 However, after VM is destroied, my vdi list like Name Id Size Used Shared Creation time VDI id Copies Tag Alice 1 10 GB 1.3 GB 0.0 MB 2013-02-01 18:59 15d167 2 s testvdi 1 20 MB 20 MB 0.0 MB 2013-02-02 11:45 f348ba 2 name s testvdi 2 20 MB 0.0 MB 20 MB 2013-02-03 17:56 f348bb 2 s testvdi 3 20 MB 12 MB 8.0 MB 2013-02-03 17:58 f348bc 2 testvdi 4 20 MB 12 MB 8.0 MB 2013-02-04 13:15 f348bd 2 There is another snapshot of testvdi created. I am not clear about why another one is created? I just boot a VM from snapshot testvdi, which id is 1. Could anyone please give me some suggestions? Thanks in advance ;-) -- Thanks Harry Wei