DEVSUPxx parmlib member options

System-wide DEVSUPxx parmlib member options are included to control and manage media type selection for:

Stand-alone environment:
- ENFORCE_DC_MEDIA=ALLMEDIATY ensures data class media policies are enforced for all stand-alone, non-specific mounts.
- ENFORCE_DC_MEDIA=MEDIA5PLUS ensures data class media policies are enforced for all stand-alone, non-specific mounts for any of the four 3592 tape cartridge media types.
Note: The ENFORCE_DC_MEDIA option can be used in conjunction with the tape management systems pooling support to ensure that the correct media type is mounted. Before setting this option, determine how data class is used in the stand-alone environment to ensure that a data class with the correct media type specification is selected and that any tape management system pool assigned to the allocation request matches the media type specified in the assigned data class.
Manual Tape Library (MTL) non-specific volume requests:
- MTL_NO_DC_WORM_OK indicates that the installation is managing WORM media allocations through the tape management system pooling support, instead of data class. This option results in OPEN accepting MTL WORM scratch mounts when no media type is identified via data class.
Automatic Tape Library (ATL) partitioning:
- MEDIA5=xxxx
- MEDIA6=xxxx
- MEDIA7=xxxx
- MEDIA8=xxxx
where xxxx is a 4-digit hexadecimal category code.