Disconnecting control units from a processor

1. On the Control Unit List, select a control unit and the Change action from the context menu (or action code  c ). HCD displays the Change Control Unit Definition panel.
2. On the Change Control Unit Definition panel, press the Enter key. HCD displays the Select Processor/Control Unit panel.
3. On the Select Processor/Control Unit panel select a processor and the Disconnect action from the context menu (or action code  n ).

Disconnecting multiple control units from a processor: 

If you want to disconnect multiple control units from one processor in one step, open the Control Unit list via the Channel Path List. On the Control Unit List, select one or multiple control units and use the Disconnect action from the context menu (or action code  n ).