Introduction › Preparing the Tape Library › Volume Data Structure

Volume Data Structure

CA TLMS supports the following tape data structures:

• Multi-data set volumes

  These are volumes that contain two or more data sets. One data set is identified as the controlling data set (CDS) so that you can define retention for the most critical data set on the volume. This defaults to the first data set on the volume. To change this, see the section Changing the Controlling Data Set.

  VOL1           DSN1 (CDS)                     DSN2
  

• Multivolume data sets

  Data sets start on a base volume and are continued on one or more additional volumes. CA TLMS automatically chains together all volumes associated with a data set so that the retention criteria you define for the data set controls all of its volumes.

  VOL1                             DSN1
  

VOL2                             DSN1

• Multivolume multi-data sets

  Any volume in a multivolume data set can also have multiple data sets.

  VOL1             DSN1                         DSN2
  

  VOL2                             DSN2
  

  VOL3             DSN2                         DSN3
  

More information:

Changing the Controlling Data Set