2.1;dmtvol (dismount_volume), revision 2.1, 81/06/27
DMTVOL (DISMOUNT_VOLUME) -- Dismount a logical volume.
usage:  DMTVOL  {W | S | F}[unit]  [log_vol_number]  [pathname]  [-FU | -NW]


FORMAT

  DMTVOL device[unit]  [log_vol_number]  [pathname]  [options]


  DMTVOL dismounts a logical volume that was previously mounted with the MTVOL
  (MOUNT_VOLUME) command.  After the volume has been dismounted, it is
  unavailable for further access.


ARGUMENTS

  device
  (required)       Specify the type of disk on which the volume resides:
                   "W" for a Winchester disk, "S" for a storage module, or
                   "F" for a floppy disk.

  unit
  (optional)       Specify a unit number (0 or 1 only) for the device, if
                   necessary.  For example, S1 denotes storage module unit 1.
                   Default if omitted: 0 (zero)

  log_vol_number
  (optional)       Specify the number of the logical volume to be dismounted.
                   Default if omitted: 1

  pathname
  (optional)       Specify  the entry directory of the logical volume.  If you
                   include this argument, DMTVOL dismounts the volume and
                   uncatalogs its entry directory.
                   Default if omitted: DMTVOL dismounts the logical volume, but
                                       retains its name in the naming tree.


OPTIONS

  -FU              Forcibly unlock any locked objects, then dismount the volume.
                   If you omit this option, the dismount fails if the volume
                   contains any locked objects.

  -NW              No_write -- Prevents DMTVOL from trying to write to the disk
                   during the dismount.  Normally, writing to the disk saves
                   current information.  However, if the disk was removed prior
                   to dismount, this option should be used.


EXAMPLES

  1. $ dmtvol s 2           Dismount storage module unit zero, logical volume 2,
     $                       and leave its name in the naming tree.

  2. $ dmtvol f /floppy     Dismount floppy unit zero, logical volume 1,
     $                       and delete its name from the naming tree.


RELATED TOPICS

  MOre information is available.  Type:

    - HELP MTVOL
      for details about mounting logical volumes.