dir fs netfs logical disk iscsi scsi mpath rbd sheepdog chap ceph auto ext2 ext3 ext4 ufs iso9660 udf gfs gfs2 vfat hfs+ xfs ocfs2 auto nfs none dos dvh gpt mac bsd pc98 sun lvm2 auto lvm2 [a-zA-Z0-9_\+\-]+ -1