/ABORT_VIRTUAL_UNIT DSAn:
       /ABORT_VIRTUAL_UNIT /ALL

    Note: Do not include any HBMM-specific qualifiers in a command
    with this qualifier; doing so causes the command to fail.

    Aborts mount verification on the specified shadow set or on all
    shadow sets in mount verification on the system.

    Use this qualifier when you know that the unit cannot be
    recovered. When you use this qualifier, the shadow set must be
    in mount verification. The shadow set aborts mount verification
    immediately on the system from which the command is issued.
    If the shadow set is not in mount verification, this command
    returns the error %SYSTEM-E-UNSUPPORTED, unsupported operation or
    function.

    After this command completes, the shadow set still must be
    dismounted. Use the following command to dismount the shadow
    set:

    $ DISMOUNT/ABORT/OVERRIDE=CHECKS DSAn: