Ordering the Correct HMC Model
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Be sure you order the correct Hardware Management Console to match the code you plan to run.
The 7042 machine type is for HMCs running Version 7. This Licensed Internal Code is a requirement for managing POWER6 servers, such as the 9117-MMA. However, it will also support POWER5 and POWER5+ managed servers.
The 7310 machine type is for HMCs running Version 6. You cannot manage a POWER6 server using this HMC code. It is for POWER5 and POWER5+ managed servers only.
Many 7310 HMCs can be upgraded in the field to support HMC V7 Release 3 code. However, the reverse is not true. IBM does not support changing a 7042 HMC to support HMC V6 Licensed Internal Code. Attempting to load HMC V6 LIC on a 7042 will produce an error message and the installation will be blocked.
In current models, the only difference between the two machines is a feature code that specifies which code to install. The hardware is identical. Feature code #0961 drives shipment of HMC Version 6 with the HMC. Feature code #0962 drives shipment of HMC Version 7.
To avoid delays, be sure you know which HMC code environment you want before ordering your HMC.