Using the system-managed tape library with existing volumes

To use the system-managed tape library with existing volumes that are not defined to DFSMSrmm or if you are usingDFSMSrmm to manage these volumes for the first time, ensure that information about your volumes is recorded in the DFSMSrmm control data set.

You need to ensure that the correct status is recorded for each private and scratch volume you want to use with the system-managed tape library. One way to do this is to predefine all the private volumes. You can use any existing information you have for the volumes either from an existing tape management system or based on data set catalog entries. You use this information to build a list of RMM ADDVOLUME subcommands to define the volumes to DFSMSrmm. For example, for a private volume:

RMM ADDVOLUME volser LOCATION(ATL1) STATUS(MASTER) –
    OWNER(owner) STORGRP(storagegroup)

Adding rack numbers is optional. You can define shelf space first by using the ADDRACK subcommand so there are empty rack numbers for each volume you add.

Depending on the ISMF library entry defaults, you might be able to avoid defining scratch volumes to DFSMSrmm as this can happen automatically during entry processing.