Converting to DFSMSrmm from ASG-ZARA or AutoMedia

174 Converting to DFSMSrmm from ASG-ZARA or AutoMedia

The CDSs are shared among systems, and the tape library is partitioned with

TCDB. You need to modify CBRUXENT to partition a library. If you use the

selective REJECT command in EDGRMMxx, it may result in a volume being

recorded in the wrong TCDB. When a volume is moved out of the library and

then comes back again because one record for this volume exists in the CDS, the

REJECT command in EDGRMMxx will not work.

Private volumes are not shared because each system has its own TCDB. If you

want to use private volumes from another system, you must use add volume

entry into the TCDB using the ASM utility. You need to delete the entries after

work to avoid potential problems.

Although only one CDS is used, inventory management tasks should be run on

each system, once for each TCDB, because DFSMSrmm can only return

volumes to scratch on a system which has access to the TCDB containing the

volume.

4.3 Using DFSMSrmm with virtual tape solutions

Virtual tape solutions are always related with the use of an automated tape

library, system managed or non-system managed. Therefore, virtual tape

solutions have a different way of working than the traditional tapes. This is why

we want to make a separate section for explaining how they work, and how

DFSMSrmm provides special support for these solutions and their specific

functions.

The DFSMSrmm support for virtual solutions is basically the same for IBM

Virtual Tape Server and for other implementations, but there are some specifics

for VTS. The interface between DFSMSrmm and OAM is built-in and automated;

the interface for other virtual tape solutions must be driven by DFSMSrmm

commands.

DFSMSrmm supports virtual tape server import/export in different ways

depending on whether or not DFSMSrmm stacked volume support is enabled.

When you enable stacked volume support, DFSMSrmm tracks logical volumes

and stacked volumes.

To verify that the stacked volume support is enabled, go to the DFSMSrmm

Control Record Display panel shown in Figure 4-31.