- the first one from November 2nd talks mainly about Linux on System z support
- the second one from November 4th is a more general support statement
So it's best to view OCFS2 as a cluster file system that has been created by Oracle. Don't get confused with the Oracle DB itself. If Oracle RAC is a requirement, you are not dependent on OCFS2 - Oracle ASM is in my opinion better integrated with the Oracle DB and should be used.