You can move data sets manually or you can use the CustomPac Installation Dialog's Create a Recommended System Layout function to assign them automatically.

Understand the effects of this move on your environment. Do you have any applications that refer to the data sets specifying a UNIT and VOLUME? If references to the moved data sets use the catalog, and the catalog has been updated, then moving the data sets should have minimal impact. However, if the catalog is shared with other systems, then the impact would be greater.

You should also review your backup and recovery procedures for the data sets you plan to move.