[JeweL]

man fstab:
      The  first  field,  (fs_spec), describes the block special
      device or remote filesystem to be mounted.

      The second field, (fs_file), describes the mount point for
      the filesystem.  For swap partitions, this field should be
      specified as ``none''.

      The third field, (fs_vfstype), describes the type  of  the
      filesystem.

      The fourth field, (fs_mntops), describes the mount options
      associated with the filesystem.

      The fifth field, (fs_freq), is used for these  filesystems
      by the dump(8) command to determine which filesystems need
      to be dumped.

     The sixth field, (fs_passno), is used by the fsck(8)  pro-
      gram to determine the order in which filesystem checks are
      done at reboot time.