Closes a mounted disk or magnetic tape volume for further processing
and deassigns the logical name associated with the device. If the volume
is mounted with the /SHARE qualifier, its logical name is deassigned but
the volume remains mounted until all processes using it dismount it or
terminate.  Note that all open files on the volume must be closed before
the actual dismount can be done.  Note, also, that the file system cannot
dismount a volume while any known file lists associated with it contain
entries.


Format
 DISMOUNT device-name[:]

 Requires GRPNAM or SYSNAM privilege to dismount group
 or system volumes, respectively.

Additional information available:

ParameterQualifiers

device-name:
 Name of the device containing the volume -- either a logical name or a
 physical name. If a physical name is specified, the controller
 defaults to A and the unit defaults to 0.

Additional information available:

/ABORT/UNIT/UNLOAD

 Requires the VOLPRO privilege if you are not the owner of the volume.
 Specifies that the volume is to be dismounted, regardless of who
 mounted it.  The primary purpose of the /ABORT qualifier is to
 terminate mount verification.  DISMOUNT/ABORT also cancels any outstanding
 I/O requests.  If the volume was mounted with the /SHARE qualifier, /ABORT
 causes the volume to be dismounted for all users.

 Dismounts only the volume of a volume set on the specified device. By
 default, all volumes in a set are dismounted.

 NOTE: Avoid dismounting the root volume of a volume set since it
 contains the master file directory (MFD).

 /NOUNLOAD
 Unloads the device on which the volume is mounted. If you specify
 /NOUNLOAD, the device remains in a ready state.