Disk system.img: 161 MB, 161833984 bytes
255 heads, 63 sectors/track, 19 cylinders, total 316082 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xffffffff

Disk system.img doesn't contain a valid partition table