Changing the use attribute from PRIVATE to SCRATCH

For a request to change a volume to SCRATCH, optional parameters are ignored on the CBRXLCS macro invocation. Upon return from the installation exit, the following default values are set in the tape volume record:

Volume use attribute = S
Storage group name = *SCRTCH*
Write protection status = N
Checkpoint volume indicator = N
Volume expiration date = blank
Tape device selection values
- Recording technology is unchanged
- Media type is unchanged
- Compaction indicator is unchanged
- Special attribute is set to none
If the library supports outboard policy management, default policy names (blanks) are passed to the library.

When the volume whose use attribute is to be changed resides in a tape library, a call is made to the hardware to change the category of the volume. If the hardware change is not successful, the tape volume record is not updated and CUA processing fails. If the category of the volume is successfully changed, the scratch count for the library is updated with the number of scratch cartridges returned from the hardware.

If changing the use attribute of the volume causes the number of scratch volumes of a particular type in a library to fall below the scratch volume threshold established through the ISMF library management application, operation action message CBR3660A is issued requesting that the operator add the appropriate type of scratch cartridges to the library. If CUA processing causes the scratch count to exceed twice the scratch volume threshold for the scratch type being processed, operation action message CBR3660A is deleted if it is outstanding.