CTVACDB – Verify ACD data

Control-V uses a special block, called the ACD block, for fast access to reports that are migrated to tape. This information is saved in the SYSDATA and INDEX records in the Migration User file during the migration process. If this information becomes corrupted, the corresponding reports become inaccessible.

The CTVACDB utility scans the volume that is specified in its input stream and verifies the ACD data for all migrated CDAM and Index data sets on this volume. BMC recommends that you first run the utility in Simulation (Test) mode. If the ACD data is incorrect, the utility generates messages that the ACD data needs to be fixed or cleaned.

If you then need to run the CTVACDB utility in Production mode, the utility functions according to the value that you specify for the FUNCTION parameter, as follows:

• If FUNCTION=REPAIR, the utility corrects the ACD data.
• If FUNCTION=CLEAN, the utility cleans the ACD block in SYSDATA and INDEX records.

Note: After the CTVACDB utility cleans ACD data, the data sets are still accessible. However, accessing data sets without ACD data can increase access time.