ORA-00227: corrupt block detected in control file: (block string, # blocks string)
What triggered the Error:
A block header corruption or checksum error was detected on reading the control file.What should we do to fix it:
Use the CREATE CONTROLFILE or RECOVER DATABASE USING BACKUP CONTROLFILE command.
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