DYNSTK

Determines whether the Control-M/Tape Dynamic Dataset Stacking facility is activated. The CTTSBD utility performs batch stacking even if DYNSTK is set to N (No).

MEDIA

Specifies a Control-M/Tape logical media definitions.

The CTTSBD utility uses media definitions specified during Control-M/Tape installation (and other information) during calculation of output volume capacity.

If volume capacity information produced during a run of CTTSBD appears to be inaccurate, it may be necessary to modify the media definition for the relevant volumes.

MODE

Determines Control-M/Tape operation mode. The CTTSBD utility is fully functional only when MODE is set to PROD. However, CTTSBD can be run in simulation mode while Control-M/Tape is operating in any mode (TEST, PHASED or PROD) or even when Control-M/Tape is not active.

RTNTYPE

Determines whether retention is performed on a data set level or on a volume level.

Input data sets are considered expired by the CTTSBD utility only if they have already been marked as expired by Control-M/Tape (for example, using the CTTRTM utility).

If RTNTYPE is set to DSN in member CTTPARM, data sets whose expiration conditions are met are expired by Control-M/Tape. If COPYEXPF is set to NO in the CTTSBD utility, these data sets are not copied during batch stacking.

If RTNTYPE is set to VOL in member CTTPARM, data sets whose expiration criteria are met are not expired by Control-M/Tape until all data sets on the volume can be expired. These data sets are copied during batch stacking regardless of the value specified for CTTSBD parameter COPYEXPF.

STKMODE

Determines the search algorithm to be used by the Control-M/Tape Dynamic Dataset Stacking facility. The CTTSBD utility ignores the setting for this parameter. The CHAINRET parameter (described in CTTSBD General Utility Parameters) provides similar controls for utility CTTSBD.