Maintaining the Volume Master File › Correcting Chaining Errors › Rebuilding Volume/Data Set Chains

Rebuilding Volume/Data Set Chains

If Volume Master File updates are lost through either destruction of the transaction log or failure to properly back up the CA TLMS VMF, you may need to rebuild chains for multivolume and/or multi-data sets. If this becomes necessary, you must reconstruct as much information about the volumes and data sets as available before attempting to rebuild the chains.

Either CATLTSO or the CATINQR procedure can be used to rebuild volume/data set chains.

While data set chaining and volume chaining are very similar, each process is discussed separately on the following pages. In both cases, however, the rules for adding a new member to a chain are the same:

• You must always address the base volume of a multivolume data set or multivolume/multi-data set.
• You must always add the next logical volume or data set in the series. That is, if you wish to add 3 more volumes to an existing chain of 4 volumes, you must first add VOLSEQ=5, then VOLSEQ=6, then VOLSEQ=7. Any attempt to enter VOLSEQ=7 out of sequence will be rejected.

If both data set and volume chains have to be rebuilt, process data set chaining first.