from the man page mdmfs(8) .... The same file system created as an entry in /etc/fstab: md /tmp mfs rw,-s32m 2 0 ... shouldn't it read The same file system created as an entry in /etc/fstab: md /tmp mfs rw,-s32m 0 0 ?? the boot process stalls when md /tmp mfs rw,-s32m 2 0 is in fstab