Hallo Manfred,
ich glaube das ist Deine Lösung: (dies ausführen und dann Betriebssystem installieren)

Change from an Operations PC Console to Twinax Console
Incident Summary

Problem Summary:
How can I change from an Operations PC console to a local twinax console?

Resolution:
Do the following:
1 Verify that the local workstation controller card is in a card slot that is recognized by the system as the first controller. Hardware Support can verify this information with the card slot and system model type.
2 Verify there is a device attached to Port 0 Address 0 on the first local workstation controller.
3 Disconnect the operations console cable from the system.
4 Force DST and sign on as QSECOFR to change the console bit. Do the following:

a Select Option 5 - DST Environment, and press the Enter key.
b Select Option 2 - System Devices, and press the Enter key.
c Select Option 6 - Console Mode, and press the Enter key.
d Select Local Twinax console.
5 An IPL is required to have the new console allocated to the controlling subsystem.