Step 20: Verify Media Database Integrity

Job CONVIDB runs utility CTTIDB to verify the integrity of the Control-M/Tape Media Database. CTTIDB issues messages if database inconsistencies are detected. Examples of such inconsistencies are

• errors in links that connect volumes in a multi-volume chain
• active volumes that do not contain datasets
• scratch volumes that contain active datasets
• discrepancies between Media Database records

For more information about utility CTTIDB, see the verifying media database integrity chapter of the Control-M/Tape Implementation Guide, and the Control-M/Tape chapter of the INCONTROL for z/OS Utilities Guide.

If utility CTTIDB reports errors, it might indicate problems that were overlooked or missed during preparation of the CA-EPIC/MVS DSN Catalog. If this is the case, correct the original data and repeat the conversion process from Step 4 (Format Media Database). You can also correct problems directly in the Control-M/Tape Media Database. For more information about manual update of the Media Database, see utility CTTMUP in the Control-M/Tape chapter of the INCONTROL for z/OS Utilities Guide.

CTTIDB also generated Media Database statistics that can be used to compare the Media Database and the CA-EPIC/MVS DSN catalog.

The statistics provided include

• Number of used data records
• Number of used index records
• Number of free data records
• Number of free index records
• Total number of records according to type (volume, dataset, scratch)

For information about the structure of the Media Database, for example, data records and index records, see the Control-M/Tape chapter of the INCONTROL for z/OS Administrator Guide.