Mount a VirtualBox disk image: VBoxManage internalcommands dumphdinfo [NameOfImage].vdi - Find the data offset (offData) parameter use losetup to make a loop device at that offset + the offset to the partition you want (32256 for the first one) Note: if copying a virtual partition out onto a real one, double-check for off-by-one errors in the offset by making sure that the first sector looks correct early in the copy.