Question about changing GI Home

Hoping someone has run through this before and can provide some of their experiences.

We had a contractor (no longer with us) who performed an install of GI 11.2.0.3 on a Red Hat Linux 6.4 cluster (2 nodes) into an 11.2.0.4 directory structure (/u01/app/grid/11.2.0.4).

Well, now we want to upgrade from 11.2.0.3 to 11.2.0.4 and are trying to find the cleanest way to do this. Some ideas have included wiping the host (not preferred), de-installing GI, moving 11.2.0.3 binaries and performing brand new install (as if the original never existed).

A co-worker found the following document from Oracle that talks about changing the GI home path, which seems like the simplest way to do it:

http://docs.oracle.com/cd/E11882_01/install.112/e41961/rem_orcl.htm#CWLIN2955

We'd shut everything down, follow the instructions, modify some of our profiles and oratab, and then we could run our 11.2.0.3 to 11.2.0.4 upgrade like normal.

So, is this really as easy as the referenced document makes it seem? What are the caveats and gotchas we should know before going into this?

We're setting up a sandbox environment to test this, but any insight from past experience would be greatly appreciated.

Thanks,
Scott

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