Managing undefined volume serial numbers

DFSMSrmm does not manage volumes that are not defined to DFSMSrmm. These types of volumes are also known as foreign tape volumes. You do not need to have volumes that are foreign to DFSMSrmm, because you can define any volume to DFSMSrmm including duplicates. DFSMSrmm always rejects foreign volumes when they are mounted in response to a request for a scratch tape. To control the use of foreign tapes for non-scratch requests, you can set up DFSMSrmm so that DFSMSrmm rejects foreign volumes when they are opened.

To have DFSMSrmm reject foreign volumes, specify (in the DFSMSrmm EDGRMMxx parmlib member) an OPENRULE command with TYPE(NORMM) and an action of REJECT. You can use OPENRULE for any set of volumes identified with the VOLUME and VOLUMERANGE operands. See Controlling the use of tape volumes: OPENRULE for more information about the OPENRULE command.

To prevent DFSMSrmm from rejecting undefined or foreign volumes when you use the OPENRULE command with action REJECT, also use an action of IGNORE to request that DFSMSrmm ignore the undefined volumes. All volumes ignored with the IGNORE action must be authorized to be ignored. When DFSMSrmm ignores a volume, DFSMSrmm does not perform these tasks:

Record information about the volume in the DFSMSrmm control data set.
Validate that the correct volume has been mounted.
Perform management functions for the volume.

When DFSMSrmm is configured to ignore a volume, DFSMSrmm does, however, perform these tasks:

Checks your authorization to ignore the volume using profiles in the FACILITY class.
If you are authorized to ignore the volume by the FACILITY class profiles, this overrides any decision taken by RACF during OPEN processing.

Note: OPENRULE is the preferred command for rejecting and ignoring volumes. The previously used REJECT command and EDGUX100 exit module will continue to work if they have already been specified.