I tried to create a small test-env to compare oracle 10G and 11G.
11G ASM (126.96.36.199)
11G DB (188.8.131.52)
10G DB (10.2.0.4)
Both DBs a re using their own DiskGroup within ASM, called according to their SID.
now at the 'CREATE DATABASE' i get:
ORA-00200: control file could not be created
ORA-00202: control file: '+TEST10G_DG'
ORA-17502: ksfdcre:4 Failed to create file +TEST10G_DG
ORA-15001: diskgroup "TEST10G_DG" does not exist or is not mounted
ORA-15204: database version 10.2.0.3.0 is incompatible with diskgroup TEST10G_DG
I also checked the Known Issues from 10.2.0.4 Patch Set - Availability and Known Issues, but with no results.
Once again, this leads to a new ServiceRequest (only visible for my CSI - sorry).
dbca sets 'compatible=10.2.0.3' in the init.ora it uses to create the DB. this was the source of the problem.
By changing this Value to 10.2.0.4, everything is fine now.