Grid Infrastructure ORACLE_HOME for 11.2.0.3
Currently have 11.1 of CRS installed in /u1/app/crs. There was documentation that said thou shalt not install into the RDBMS ORACLE_BASE due to the CRS software needing ROOT access and the files/directories will be owned by ROOT. Somebody could use the root access for malicious purposes, so install in a separate area.
Oracle11.1.0.7 is installed in /u1/app/oracle/product/11.1, with ORACLE_BASE = /u1/app/oracle
Now comes 11gR2
We'll put the database in /u1/app/oracle/product/11.2.0.3, that's easy.