AIX 5.1 ML 4 --> AIX 5.1 ML 9 with system microcode update

[cts123]

Hi,

I have a machine which is of model 7038-6M2
The microcode is very old. It was never upgraded.
We had some issue with the CPU card and this point of time we have to replace the CPU card.
IBM is saying to change the CPU card the system microcode is required to be upgraded.
I have downloaded the latest patch BIN file and getting ready to do that.
The OS is runnning AIX 5.1 ML 4
After microcode update, is there any risk involved?
Do I need to upgrade the OS ML too right after CPU card change? If I look at the IBM site, there is no ML available for AIX 5.1 except ML9. Can I proceed with ML9 right from ML4? Is there any risk ..?

Need some concrete suggestion.

Thanks ..

Regards,

-Sam

 

[DukeSSD]

Because 5.1 has been out of support for some time now IBM withdrew the fix support and now you can only get the final rollup package.
It is OK to go straight to ML9, that will get you ALL the fixes available.
You shouldn't NEED to update AIX if you are happy with the system as it is even with the updated firmware, but as above you may as well go for all the fixes as it is now out of support.

 

[cts123]

Thanks DukeSSD,

I am planning for microcode upgrade only. Let see after latest microcode upgrade it AIX 5.1 ML 4 runs fine w.o any issue, we will stick on that.

Don't know whether by upgrading the ML will affect the application running on top. We don't have support available for that application too.

Let see..

Thanks anyway ..and I will post the outcome.

I will do this exericse on coming Sunday maintenance window.

Regards,

-Sam