Oracle Enterprise Manager 10gR5 Upgrade Checklist
By chung.wu on Mar 10, 2009
Looks like many people have downloaded the 10gR5 release to give it a try. Since 10gR5 is a 'patchset release', a person needs to first install an earlier version of Enterprise Manager Grid Control and then apply 10gR5 on top in order to complete the full 10gR5 install. My colleague Akanksha has written a handy checklist on the key things to pay attention to when upgrading from 10.2.x to 10.2.0.4/10.2.0.5 on the OMS (Enterprise Manager Server) and the repository. See My Oracle Support Note 464674.1 for more details.