DFSMShsm

The CTTSYNC utility automatically compares the Media database with the DFSMShsm repository and lists all inconsistencies. No updates are made to the Media database or to the repository. For more information about DFSMShsm and Control-M/Tape support, see the chapter in the Control-M/Tape Implementation Guide that discusses External Data Managers.

The utility uses the VOLEDMID field of the Media database volume record in order to verify whether the volume is controlled by DFSMShsm, or whether it is controlled by a different External Data Manager, such as CA-Disk. The VOLEDMID field is automatically updated by the Control-M/Tape real time environment and is set according to the creation PGM.

The following comparisons are available between the Media database and the DFSMShsm repository:

• Checks that all volumes controlled by DFSMShsm are marked in the Media database as Active and EDM.
• Checks that all volumes that are not controlled by DFSMShsm and that have a value of HSM in their EDMID field, are marked as scratch in the Media database.

To synchronize the Media database with the DFSMShsm repository, the CTTSYNC utility must be run using the CTTSYNCH job from the .CTT JCL library.