Verifying Data Integrity of Media Databases

In the Control‑M/Tape Media Database, data of different types are stored in separate records that are linked using the following mechanisms:

• data fields in data records that reference other data records

  For example, field DDSVOLSR in a dataset record indicates the record of the volume containing the beginning of the dataset.

• index records that link data records (for example, the L-index record)
• counters within data records (for example, field DVLACTD# in a volume record indicates the number of datasets in the volume)

  Media Database integrity is the degree to which the links between data or index records are free of errors. A high level of integrity is necessary to ensure smooth processing by Control‑M/Tape. Use the CTTIDB utility to check Media Database logical integrity on a daily basis (for example, as a part of the Control‑M/Tape New Day Procedure).