HA - Windows MSSQL - MCSC - EHPI

Question

HI All,
I would like to clear some doubt after reading EHP upgrade guide and some notes:
1) In upgrade guide, it mentions if ERS is manually setup, we need to revert configuration. --> What does this mean?
2) For dialog instance of HA, we just need to upgrade the kernel of dialog instance manually if it doesnt share the kernel in central repository?
3) How about ERS? do we need to upgrade the binary for ERS, as ERS is installed on local drive? SAP guide and note didn't mention this.
Thanks,
nicholas
Edited by: Nicholas Chang on Feb 28, 2012 10:04 PM

Answer 1

Hi All,
Instead of waiting fellow sapadmin to answer my question, is good for me to express my understanding and hope fellow sapadmin will correct me if i'm wrong.
EHP5 upgrade from ERP6:
1) Move all resource to one node, eg: node1
2) lauch EHPI
3) Temp License needed during shadow instance build
4) at downtime, manually stop ASCS, ERS and dialog Instance
5) Disable auto start service for cluster and pause node2.
Post Upgrade:
1) Manually update the kernel for Dialog Instance and ERS since they are local installation
2) as per note 1050343, stop the windows cluster service in services.msc manually and replace the files in %windir%\system32 on both node
3) Replace the files in %windir%\SapCluster for both node
4) Install SAPHOSTAGENT and place saposcol file to %windir%\SapCluster ?
Appreciate if someone who has experience on HA upgrade could shed some light on this.
Cheers,
Nicholas Chang