Characteristics of the ARCRPEXT Exit

The ARCRPEXT installation exit receives control after DFSMShsm has received a request to delete or to recall a data set, or a request to recover a data set or volume, but before the MWE for such a request has been queued for the appropriate functional subtask.

For a recall request from tape, DFSMShsm is normally able to flag that fact in the input data structure and flag that the device-type flag is valid. For a recall request from DASD, the MCD record is not read. Thus the device-type flag is not guaranteed to be valid, but the device type is nearly always DASD, even though the device type is flagged invalid (0).

For a recover request, if a data set or volume is being restored from a dump or a data set is being recovered, DFSMShsm is able to set the proper device-type flag in the input data structure, with an indication that the device type is valid. For an MWE to recover (not restore) a volume, the device-type flag cannot be considered valid.

This exit is called for both system- and non-system-managed data sets.

Note: Do not confuse this exit with the data set deletion exit ARCADEXT or the recall exit ARCRDEXT.

The ARCRPEXT routine must be reentrant.