ORA-00205: error in identifying control file, check alert log for more info
What triggered the Error:
The system could not find a control file of the specified name and size.What should we do to fix it:
Check that ALL control files are online and that they are the same files that the system created at cold start time.
If this was not sufficient go over to:
Oracle Official Support Knowledge Center
Or maybe those geeks at: StackOverflow Board
Or maybe those geeks at: StackOverflow Board