Catalog Cleanup

As described above, the conversion tool generates Media Database records from information in the MVS Catalogs. To avoid conversion of unnecessary information, it is recommended that you use the parameters of the conversion tool to filter MVS Catalog entries for the following:

• Device types to be handled by the conversion
• Volumes to be converted
• Extracting the Most Up-To-Date Information

The conversion tool automatically converts the most up-to-date information in the MVS Catalogs.

If multiple Catalog entries describing different datasets all indicate the same volume and label number, a Control-M/Tape dataset record is created only for the last created dataset for that volume or label. Messages issued by the conversion tool describe the other (duplicate) Catalog entries that are ignored.

The conversion tool also ignores MVS Catalog entries for volume labels that are no longer valid.

For example, if an MVS Catalog contained two entries representing the first and second datasets on a volume, and the first dataset on that volume was recreated, the second dataset on the volume becomes obsolete since it is no longer accessible. The conversion process ignores the Catalog entry for this second dataset.