root@xen:~# apt-get install ntfsprogs kpartx

Sauvegarde

root@xen:~# lvcreate -s -L1G -nvm_backup /dev/vg/xen_vm
root@xen:~# kpartx -a /dev/vg/xen_vm_backup
root@xen:~# ls -l /dev/mapper/vg-xen_vm_backup*
lrwxrwxrwx 1 root root      7 Oct 24 12:21 /dev/mapper/vg-xen_vm_backup -> ../dm-6
lrwxrwxrwx 1 root root      7 Oct 24 12:22 /dev/mapper/vg-xen_vm_backup1 -> ../dm-9
root@xen:~# ntfsclone -s -o vm-20121024.img /dev/mapper/vg-xen_vm_backup1
root@xen:~# lvdisplay vg/xen_vm > vm-20121024.txt
root@xen:~# kpartx -d /dev/vg/xen_vm_backup
root@xen:~# lvremove vg/xen_vm_backup

Restauration

root@xen:~# kpartx -a /dev/vg/xen_vm
root@xen:~# ntfsclone -r -O /dev/mapper/vg-xen_vm vm-20121024.img
root@xen:~# kpartx -d /dev/vg/xen_vm