# vzdump --compress --snapshot --all
INFO: Starting new backup job - vzdump --compress --snapshot --all
INFO: Starting Backup of VM 1010 (openvz)
INFO: status = CTID 1010 exist mounted running
INFO: creating lvm snapshot of /dev/mapper/vg1-vz ('/dev/vg1/vzsnap')
INFO:   /dev/dm-10: read failed after 0 of 4096 at 0: Input/output error
INFO:   Logical volume "vzsnap" created
INFO: mounting lvm snapshot
INFO: creating archive '/var/lib/vz/dump/vzdump-1010.dat' (/mnt/vzsnap/1010)
INFO: Total bytes written: 573726720 (548MiB, 5.4MiB/s)
INFO: file size 224MB
INFO:   /dev/dm-10: read failed after 0 of 4096 at 0: Input/output error
INFO:   Logical volume "vzsnap" successfully removed
INFO: Finished Backup of VM 1010 (00:02:02)