none auto ext2 ext3 ext4 ufs iso9660 udf gfs gfs2 vfat hfs+ xfs raw dir bochs cloop cow dmg iso qcow qcow2 vmdk vpc [a-zA-Z0-9_\+\-\.]+ [0-9]+ /[a-zA-Z0-9_\+\-\./%]+ [kKmMgGtTpPyYzZ]