apt-get install libguestfs-tools
#apt-get install linux-image-generic

# virt-filesystems -a plop_disk0.vmdk
/dev/sda1
/dev/vghome/lvhome
/dev/vgsyst/lvopt
/dev/vgsyst/lvroot
/dev/vgsyst/lvtmp
/dev/vgsyst/lvusr
/dev/vgsyst/lvvar

mkdir -p /mnt/vm/root
guestmount -a plop_disk0.vmdk -m /dev/vgsyst/lvroot --ro /mnt/vm/root