During a D-mode IPL, the step for console detection can take longer than normal.
This can be the result of a problem or configuration change. If you are troubleshooting a connection issue, you can force the system to end the search for the console by performing a function 21 (enable DST) from the control panel, remote control panel, or Hardware Management Console. This speeds up the process of posting a failing system reference code (SRC) without waiting the entire search time, which can be 45 minutes or longer. It is best if you let the system attempt to find the console for five or 10 minutes before circumventing the step unless you expect a failure to occur and only need to retrieve the SRC data.