1    /ALL

    Optional.

    Dismounts one of the following:

    o  All file systems from all servers: DISMOUNT /ALL

    o  All file systems on the specified server: DISMOUNT /ALL
       /HOST=host

    o  All file systems on the specified device: DISMOUNT DNFSn: /ALL

    If you dismount using the /ALL qualifier, the dismount operation
    completes even if the server is not currently reachable.

2    /HOST

       /HOST=host

    Optional. Default: None.

    Dismounts all file systems from the specified NFS server.

    Valid only with the /ALL qualifier.

3    /WAIT

       /WAIT
       /NOWAIT

    Optional. Default: /NOWAIT.

    o  /WAIT

       -  Does not dismount the mounted file system if outstanding
          activities exist.

       -  Waits until the dismount has been completed.

       -  If you try to access any files on the mount point, the
          dismount fails.

    o  /NOWAIT

       -  The client completes the command immediately.

       -  Dismounting does not actually occur until all file activity
          has been completed.