Managing volumes with duplicate volume serial numbers

In DFSMSrmm, a duplicate volume has these attributes:

You can manage volumes with duplicate volume serial numbers by performing these tasks:

Define the volumes with duplicate volume serial numbers so that you can use them without changing the volume serial number as described in Using volumes with duplicate volume serial numbers.
Change the volume serial numbers as described in Changing duplicate volume serial numbers.
Use the volumes with duplicate volume serial numbers and request that they not be managed by DFSMSrmm. See Ignoring duplicate or undefined volume serial numbers for information about using EDG_EXIT100 to ignore duplicate volume serial numbers.
Note: Although you can define, list, and manage duplicate volumes at any time, DFSMSrmm only fully supports the use and validation of duplicate volumes when you run with OPMODE(Protect).