ORA-00218 Block size %s of control file ‘%s’ does not match DB_BLOCK_SIZE (%s)

Cause: The block size as stored in the control file header is different from the value of the initialization parameter DB_BLOCK_SIZE. This might be due to an incorrect setting of DB_BLOCK_SIZE, or else might indicate that the control file has either been corrupted or belongs to a different database. Action: Restore a good copy of…