DELETE UNIT is used to delete UNITs. Irrespective of whether
           or not the disk is mounted on OpenVMS, you will be prompted for
           confirmation before proceeding to delete the selected UNIT.

           Suppose the disk is mounted on OpenVMS node, in addition to the
           prompting for confirmation, you will also be informed that the
           disk is mounted.

           Note:

                - After a UNIT is deleted, its unit number remains unused
                  until manually assigned to a new UNIT.

                - Unit numbers are not automatically reassigned when a UNIT
                  is deleted.

                - If more than one UNIT has been created on a disk/disk group,
                  only the last created UNIT can be deleted.

                - It is important to maintain a record of the unit numbers and
                  the order in which they are created on a disk/disk group.

            Format:
                    DELETE UNIT <unit_n> / <qualifiers>