Chapter 2. Architecture and technical overview 111
2.12.6 HMC code level
The HMC code must be at V7R7.6.0 to support the Power 770 and Power 780 systems
(MMD and MHD systems).
In a dual HMC configuration, both systems must be at the same version and release of
the HMC.
If you want to migrate an LPAR from a POWER6 processor-based server onto a POWER7+
processor-based server using PowerVM Live Partition Mobility, consider how the source
server is managed. If the source server is managed by one HMC and the destination server is
managed by another HMC, ensure that the HMC that is managing the POWER6
processor-based server is at V7R7.3.5 or later, and that the HMC that is managing the
POWER7+ processor-based server is at V7R7.6.0 or later.
2.13 Operating system support
The IBM POWER7+ processor-based systems support the following operating systems:
AIX
IBM i
Linux
In addition, the Virtual I/O Server can be installed in special partitions that provide support to
the other operating systems for using features such as virtualized I/O devices, PowerVM Live
Partition Mobility, or PowerVM Active Memory Sharing.
For details about the software available on IBM Power Systems, visit the IBM Power Systems
Software™ website:
http://www.ibm.com/systems/power/software/index.html
Tips:
When upgrading the code of a dual HMC configuration, a good practice is to disconnect
one HMC to avoid having both HMCs connected to the same server but running different
levels of code. If no profiles or partition changes take place during the upgrade, both
HMCs can stay connected. If the HMCs are at different levels and a profile change is
made from the HMC at level V7R7.6.0, for example, the format of the data stored in the
server could be changed, causing the HMC at a previous level (for example, V7R7.3.5) to
possibly go into a recovery state because it does not understand the new data format.
Compatibility rules exist between the various software that is executing within a
POWER7+ processor-based server environment:
–HMC
–VIO
– System firmware
– Partition operating systems
To check which combinations are supported and to identify required upgrades, you can
use the Fix Level Recommendation Tool web page:
http://www14.software.ibm.com/webapp/set2/flrt/home
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