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HMC Upgrade Question

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Operating Systems AIX HMC Upgrade Question
# 8  
Old 12-04-2012
Quote:
Originally Posted by acascianelli
There is no failover/secondary service processor.
Ahem, sorry for being unclear: Yes, they have only one service processor (like you said above).

bakunin
# 9  
Old 12-05-2012
You can "always" update the hmc because it knows about old firmware. You should NEVER update firmware before updating the HMC

Note:there are combinations of firmware and HMC that are not supported. That does not mean it will not work long enough for you to apply a firmware update.

Reasoning is simple. The are possible features in new firmware that old HMC code does not know, so cannot support. Sometimes there are changes made to data structures in PHYP such that the HMC cannot communicate with managed system, or could even corrupt HMC presentation of the system with new firmware.

Thus, always update HMC first.
# 10  
Old 12-05-2012
I just got off the phone with IBM support over this matter. It turns out that the HMC update I'm trying to do will work without re-IPL'ing my managed systems.

The only thing they warned me about was making sure that my managed systems were set to boot from the temporary firmware which was compatible with the newer versions of the HMC.
# 11  
Old 12-26-2012
Finally got around to running this upgrade. Everything went fine. The one problem I ran into was that I was not able to upgrade directly from 7.3.4.0 to 7.7.6.0. I had to upgrade first to 7.7.5.0, the from there I was able to upgrade to the latest.
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