System Integrity

CA 1 has the following system integrity features:

At initialization, CA 1 verifies the integrity of the operating system interface.
An accurate system date and time is critical for managing tapes. CA 1 performs checking during initialization and normal processing to help ensure they are correct.
When the TMC is backed up, the volume serial number (VOLSER) of the backup tape is automatically recorded. If a restore is necessary, this VOLSER is checked against the tape mounted for the restore. This assures that the most current backup tape is used.
The Audit data set provides complete TMC integrity. No record can be modified in the TMC without a corresponding record being written to the Audit data set.
Approximately every 30 minutes, CA 1 verifies that the databases have not been moved or re-cataloged since the previous CA 1 initialization.
CA 1 notifies operations when the number of used DSNBs exceeds a site-defined level.
CA 1 notifies operations when the number of Audit records written exceeds a site-defined level.