Another question has rissen in my mind:

We have a RAID5-SAN. There is only one huge volume where all data remains. Also the control files. When databases are created, Oracle creates 3 control files in the same directory. It doesn't matter where those files are, because when the volume fails, everything fails.

Question: Because we only have one volume, is it safe to only create two control files?

I ask this, because performance will decrease when the number of control files increase and vice versa.

Creating only one, would be best (performance wise), but I think that's a bit tricky!

A penny for your thoughts...