/MEDIA_FORMAT=keyword

    Specifies the format in which a data structure is to be dumped.
    If you specify this qualifier, you must use one of the following
    keywords:

    CDROM          Specifies ISO 9660 media format. This format is
                   the default if you do not specify the /MEDIA_
                   FORMAT qualifier.

    CDROM_HS       Specifies High Sierra media format.