My DB is running with out Backup and also DB is in NO Archive log mode.How to find out the below issue. The following problem occured during DB operation: ORA-01115: IO error reading block from file 11 (block # 236928) ORA-27072: File I/O error Additional information: 4 Additional information: 236928 Additional information: 409600 ORA-01115: IO error reading block from file 11 (block # 236928) ORA-27072:...