Power Enterprise Pool and the master HMC
A single Hardware Management Console (HMC) must be selected as the master HMC for a Power Enterprise Pool. The HMC that is used to create a Power Enterprise Pool is initially set as the master HMC of that pool. You can set a new master HMC for a pool at any time.
When you power on or restart a server, ensure that the server is connected to a managing HMC.
When both the server and its managing Hardware Management Consoles are powered off, restart a
managing HMC first, then restart the server.
Note: If a restarted server is not able to contact any
managing HMC, it restarts with no Mobile CoD resources. However, when a managing HMC connects to the
server, the Mobile CoD resources are automatically assigned back to the server.
- Upgrading the master HMC
- You cannot perform any Power Enterprise Pool change operations when you are upgrading the master HMC. After the upgrade is complete, you can resume performing pool change operations. If you plan to perform any pool change operations when you are upgrading the master HMC, you must set a new master HMC before you start the upgrade.
- Installing the master HMC
- Performing a clean installation of the master HMC deletes all Power enterprise pool data from the HMC. After installation, the HMC cannot resume master HMC functions for the pool until you perform a recovery operation. To avoid this situation, you can set a new master HMC for the pool before you start the clean installation of the current master HMC.
To perform a recovery operation after a clean installation of the HMC, run the following HMC command in a restricted shell terminal:
chcodpool -o recover -p <pool name> -f<configuration file name>[-a“attributes”] [-v]
For more information, run the man chcodpool command in a restricted shell terminal on the HMC to view the online help.
