Using the HMC to switch to the other side of the service processor

Learn how to use the HMC to switch to the other side of the service processor, if necessary.

You should usually be running on the Temporary side.

Note: If you are working on a 7037-A50 or 7047-185 system, there is no way to force a boot from the permanent side if the image on the temporary side is valid and bootable. A permanent side boot will only occur if the temporary side image is corrupted.

Follow these steps to change the boot side and shut down and restart the system using an HMC:

Expand the Licensed Internal Code Maintenance folder.
Click the Licensed Internal Code Updates icon.
In the contents area, click Flash Side Selection.
Indicate to shut down and restart to the other flash side of the service processor. In the Flash Side Selection window, select p-side or t-side based on the information you recorded earlier. If you recorded temp, select p-side, if you recorded perm, select t-side.
Click OK.
In the Confirm Flash Side Selection window, click OK.
Shut down and restart the managed system using the usual procedures to shut down the logical partitions:
Note: This process is disruptive. You need to manually shut down all the applications and logical partitions to prevent the system from shutting them down abnormally during the process.
- To shut down AIX^® logical partitions, see Shutting down AIX.
- To shut down i5/OS^® logical partitions, use the Power Down System (PWRDWNSYS) command from an i5/OS command line (either in a 5250 emulator session on your HMC, or on the Operations Console). For further instructions, see Shutting down i5/OS logical partitions.
- To shut down Linux^® logical partitions, see Shutting down Linux.
At the end of a disruptive process, the managed system automatically returns to its original state.
Perform a disruptive activate from the HMC by completing the following steps.
1. Expand the Licensed Internal Code Maintenance folder.
2. Click the Licensed Internal Code Updates icon.
3. In the Contents area, click Change Internal Code.
4. In the Target Object Selection window, click the target system, and click OK.
5. In the Change Internal Code window, select Select advanced features, and click OK.
6. In the Advanced Features window, select Disruptive activate, and click OK.
  At the end of a disruptive process, the managed system automatically returns to its original state.