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Volume Not in Library Support z/OS DFSMS Software Support for IBM System Storage TS1140, TS1130, and TS1120 Tape Drives (3592) SC23-6854-00 |
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In the past, for all calls to the CBRUXVNL exit, the supplied sample
code linked to EDGLCSUX to retrieve the DFSMSrmm information for the
volume. Now, calls to EDGLCSUX can be made only when it is determined
that the request is for a tape volume. However, exit customization
may be required in order to get complete benefit from this new support.
The new input fields in CBRUXNPL are used during the job setup call
to the exit to make an informed decision. The decision is added to
CBRUXVNL and is partly selectable via conditional assembly to enable
easy customization by you. An informed decision can be made when catalog
information is available that confirms whether a volume is a tape
or not. By default, the initial call to EDGLCSUX is made in these
cases:
DFSMSrmm provides the possibility to further enhance the EDGLCSUX
calls by providing an option to compare the JCL esoteric unit name
against a list of your known tape unit names. You can enable this
additional option by customizing the default processing by:
Figure 1. Contents of the shipped table: TAPEUNITS
When you have &TAPEDEC set to 'YES', CBRUXVNL checks the supplied unit name and calls EDGLCSUX only in the case where it matches some tape unit name within the TAPEUNITS table. Otherwise, the EDGLCSUX call is skipped. In addition, the decision to issue message EDG8197I for non-RMM managed volumes is made selectable via an option flag in the EDGLCSUP parameter list. The CBRUXVNL exit shipped by DFSMSrmm sets this option flag ON when the device type supplied by catalog is a tape device or &TAPEDEC is set to 'YES'. Otherwise, this option flag is OFF. To change this decision, you can customize the CBRUXVNL source code. This ensures that you will see message EDG8197I when you believe the volume is a tape volume, and the tape volume is not managed by DFSMSrmm. |
Copyright IBM Corporation 1990, 2014
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