[Info]e.g.) Default 8GB(orig.img) -> 20GB(test.img) any..Both Single-Image and BackingType-Image Test format: qcow2Tools: parted, qemu-img, qemu-nbdTest Platform: Ubuntu 13.04 x86_64 [Start] - Check Image# qemu-img info orig.img image: orig.imgfile format: qcow2virtual size: 8.0G (8589934592 bytes)disk size: 883Mcluster_size: 65536# qemu-img create -b /home/orig.img -f qcow2 test.img# qemu-img i..