On 05/09/2015 05:00 PM, Leon Fauster wrote: > modern filesystems and image formats do not allocate the whole space if not neccessary (qcow2 feature). Not specifically. Every disk image type would be sparse if it were copied off a disk and back by a tool that wrote them correctly. qcow2 does support small files on filesystems that don't support sparse files, but in that case du and ls will show the same size.