Oracle Database Discussions

We need to install 112.0.1 RAC on a shared, Sun/Solaris database server. Currently, 11.2.0.1 Grid Infrastructure is already installed and has the default oraInst.loc pointer. Since the platform is shared by multiple, unrelated systems, in the past (10g), each system maintained its own central inventory (/var/opt/oracle/oraInst.loc.<system>) with CRS/Grid using the default oraInst.loc. When running OUI, we used the -invPtrLoc and -crsLocation arguments, or where that was not used, we commented-out the CRS inventory in the default oraInst.loc and temporarily inserted our inventory location.

This doesn't seem to work with 11g. Unless OUI is pointed to the Grid/CRS inventory, it complains that the system is not part of a valid cluster. If pointed to the Grid/CRS inventory to avoid the error, the database inventory is created in the default inventory along with CRS and other systems. The point of separate central inventories is to insulate the unrelated systems from inventory locks when patching and to protect the inventory against corruption by others. Is there a way to have OUI create the database inventory in another location?