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. A redundant HMC can
be configured as a backup. You can set a new master HMC for a pool at any time.
All Power Enterprise Pool change
operations can be performed only by the master HMC for the pool.
When you power on or restart a server, ensure that the server is
connected to the master
HMC.
This action ensures that the required Mobile CoD resources are assigned
to the server. When both the server and the master
HMC are powered off, restart
the master
HMC first,
then restart the server. This ensures that the server can connect
to the
HMC to
obtain its Mobile CoD resource assignments.
Note: If a restarted server
is not able to contact the master HMC, it restarts with no
Mobile CoD resources. However, when the master HMC connects to the server
the Mobile CoD resources are automatically assigned 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 on the HMC. 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>
For more information, run the man chcodpool command
in a restricted shell terminal on the HMC to view the online
help.
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