Analyzing an Integrity Error

Check the output of the CTTIDB utility every day. If a logical integrity error is detected, you should be able to determine the type of error, and which data or index records are involved, from the output of the utility. Following is a list of the most common logical integrity errors detected using the CTTIDB utility:

• Information in a data record and corresponding information in an index record do not match.
• A counter field in a data record has an incorrect value.
• A group of volumes is chained incorrectly or some volumes in the chain have conflicting attributes (for example, vaulting criteria).
• Data fields linking data records point incorrectly.
• A scratch volume points to, or is pointed to, by an active volume record.

Chose the method used to correct the error based on information in the output of the CTTIDB utility and, optionally, in record data viewed using the Inquire or Update Media Database screen (Screen TI).