Use the TMSXTEND and TMSBLDVR utilities to dynamically add volumes or DSNBs (records used to track secondary data sets on tape) to the CA 1 Tape Management Catalog (TMC).
Business Value:
As companies increase the tape usage or implement virtual tape systems, new volumes and DSNBs must be defined or added to the TMC. This should be done without disruption to the normal tape processing. Using the TMSXTEND and TMSBLDVR utilities, you can create a TMC, update a TMC, or add or remove volume ranges or DSNB records without impacting the production workload. This helps your business to maintain application and processing availability 24 hours a day, 7 days a week.
Additional Considerations:
The TMSXTEND and TMSBLDVR utilities dynamically create a new TMC format, which is known as an extended format TMC, because of the new control records that are used to maintain volume ranges. When you have converted the TMC to extended format, you no longer need to maintain exits TMSXITE and TMSXITU to convert alphanumeric VOLSER ranges to an internal numeric range (except for a few very rare cases). The new format internally takes care of conversion.
To add ranges or DSNB records, you need to allocate a new TMC with a name that is identical to the active TMC except that it has a suffix of ".N" (for "new") before TMSXTEND is executed. TMSXTEND uses this new TMC with the existing TMC to add the volumes, DSNB records, or both.
The TMSXTEND utility is designed for multi-system environments, where the TMC is shared and performs checks to ensure that all systems sharing the TMC are at the required level before proceeding.
Note: For more information about the TMSXTEND and TMSBLDVR utilities, see the Utilities and Reports Reference Guide.
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