convert lvm to raw
http://pve.proxmox.com/wiki/Storage_Migration
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qemu-img convert -O qcow2 /dev/VMStor1/vm-100-disk-1 /mnt/VMStor2/images/100/vm-100-disk-1.qcow2
http://pve.proxmox.com/wiki/Storage_Migration
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qemu-img convert -O qcow2 /dev/VMStor1/vm-100-disk-1 /mnt/VMStor2/images/100/vm-100-disk-1.qcow2