Also check the location of where your archivelogs are stored for the database as well as the online redo logs, see if it's available. Are they stored on ASM or File System ?
See if the location of the backup is also available.
list backup of datafile 1
ORA-01115: IO error reading block from file 3 (block # 65519)
ORA-01110: data file 3: 'C:\ORACLEXE\ORADATA\XE\SYSAUX.DBF'
ORA-27070: async read/write failed
OSD-04016: Error queuing an asynchronous I/O request.
O/S-Error: (OS 23) Data error (cyclic redundancy check).