Upgrading powerpath version 5.3 > 5.5 on a RHEL san boot system

Hi,

I´m new to this forum as well i began to work with emc powerpath some months ago.

I have a question that official documentation cannot give me an answer.

Given a red hat server with rootvg disks , oraclevg disks and raw disks belonging to a Clariion , in order to upgrade a to a newer version i have the next question

1.- Could i start the server with the lvm.conf filter modified in this way : filter = [ "a/sda$/" "a/sda1$/" "a/sda2$/" "r/.*/"     , all the vgs commented but rootvg and after that stop the Naviagent in the host and PowerPath , and then executing the rpm powerpath new version installation??

I mean, the server will boot from the san, but without using pseudonames and only system san disks ignoring the rest of fs and disks.

Or could it be a problem to install the upgrade rpm with just tje rootvg up where system resides .

Thanks for your answer