Disabling an alternate installation device

Certain situations might require that an alternate installation device be disabled.

1. Use the control panel to set the mode to Manual. Then perform an attended IPL using the command: PWRDWNSYS OPTION(*IMMED) RESTART(*YES) IPLSRC(B).
   Note: An alternative to this step is to use the control panel to select function 21. (Dedicated Service Tools). If you use this alternative, skip steps 2 and 9 below.
   Note: If you have a primary partition and secondary partitions and are going to use this command on the primary partition, be sure to power off all secondary partitions before running the command.

   If you are using the Hardware Management Console, refer to Managing your server using the Hardware Management Console .

2. When the IPL or Install the System display appears, select option 3 (Use Dedicated Service Tools (DST)) and press the Enter key.
3. The Dedicated Service Tools (DST) Sign On display appears. Sign on using the QSECOFR user profile.
4. The Use Dedicated Service Tools (DST) menu appears. From the Use Dedicated Service Tools (DST) menu, do the following:
   1. Select option 5 (Work with DST environment).
   2. Select option 2 (System devices) on the Work with DST Environment display.
   3. Select option 5 (Alternate installation device) on the Work with System Devices display.
5. At the Select Alternate Installation Device display, press F2 (Deselect device).
6. You should see the following message at the bottom of the display:

   Alternate installation device deselected

7. Press F3 (Exit) to return to the Use Dedicated Service Tools (DST) display.
8. Press F3 (Exit) again. The Exit Dedicated Service Tools (DST) display appears. Type 1 (Exit Dedicated Service Tools (DST)) and press the Enter key.
9. The next display you see is the IPL or Install the System display. Type 1 (Perform an IPL) and press the Enter key to complete the procedure.