594 Converting to DFSMSrmm from ASG-ZARA or AutoMedia
13.1 When to merge or split
You should not normally have to merge or split the contents of the DFSMSrmm
control data set. However, either during conversion or when you are changing the
number of MVS systems you run, you may want to merge or split the contents of
the DFSMSrmm control data set.
During conversion
When you are converting from an existing database to an DFSMSrmm control
data set, you may want to use an existing DFSMSrmm control data set. You may
have one system already converted to DFSMSrmm, and now a second is to be
converted, but you want to share the control data set with the first system.
During conversion, you will be adding data produced by EDGCNVT to an existing
control