Adding a database to the Oracle Restart Configuration

Question

Hi,
I have:
- 2 nodes - Linux RHEL 5
- Grid Infrastructure 11.2.0.1
- Database Standard Edition 11.2.0.1 + RAC
- All database files on ASM (integrated with GI), software on local storage
I manually created a clustered database and I am currently trying to add it the Oracle Restart Configuration. The first step is to create a cluster resource for the database using the 'srvctl add database' command. In the documentation I found [http://docs.oracle.com/cd/E11882_01/server.112/e10595/restart005.htm]
Important:When you manually add a database to the Oracle Restart configuration, you must also add the Oracle grid infrastructure software owner as a member of the OSDBA group of that database. This is because the grid infrastructure components must be able to connect to the database as SYSDBA to start and stop the database.
For example, if the host user who installed the grid infrastructure home is named grid and the OSDBA group of the new database is named dba, then user grid must be a member of the dba group.>
In my test system I created the resource without adding the grid user to the OSDBA group of the database and all work fine (at least I don't see any problem). The database is correctly started every time the system starts.
My question is why it is necessary to add the grid user to the osdba group?
Regards,
Tim

Answer 1

Thanks for the reply.
It's not so obvious for me. If it was written "...you should...", than it could be treated as recommended. I see "...you MUST also add..." and that for me means it's obligatory.
When you create a database with DBCA, the grid user is not added to the OSDBA group of the database. I am trying to figure out why.
Regards,
Tim