block corruption

Hi!
We found block corruption in full export log
EXP-00056: ORACLE error 1115 encountered
ORA-01115: IO error reading block from file 5 (block # 395561)
ORA-01110: data file 5: 'D:\ORACLE\ORADATA\ORCL\USERS02.DBF'
ORA-27091: unable to queue I/O
ORA-27070: async read/write failed
OSD-04006: ReadFile() failure, unable to read from file
O/S-Error: (OS 1117) The request could not be performed because of an I/O device error.

after using dbv utility on that file users02.dbf we got error again.

DBV-00102: File I/O error on FILE (d:\oracle\oradata\ORCL\users02.dbf) during ve
rification read operation (-2)

after we created repair_table and, we tried to use dbms_repair utility to check block corruption

DECLARE num_corrupt INT;
BEGIN
num_corrupt := 0;
DBMS_REPAIR.CHECK_OBJECT (
SCHEMA_NAME => 'ARH2010',
OBJECT_NAME => 'MR300',
REPAIR_TABLE_NAME => 'REPAIR_TABLE',
CORRUPT_COUNT => num_corrupt);
DBMS_OUTPUT.PUT_LINE('number corrupt: ' || TO_CHAR (num_corrupt));
END;
/

ORA-01115: IO error reading block from file 5 (block # 395561)
ORA-01110: data file 5: 'D:\ORACLE\ORADATA\ORCL\USERS02.DBF'
ORA-27091: unable to queue I/O
ORA-27070: async read/write failed
OSD-04006: ReadFile() failure, unable to read from file
O/S-Error: (OS 1117) The request could not be performed because of an I/O device error.
ORA-06512: at "SYS.DBMS_REPAIR", line 293
ORA-06512: at line 4

after we stoped all oracle services we unsuccesfully tried to copy users02.dbf to other destination

does anyone have suggestion about this problem (data block coruption, media corruption)?

Oracle DBMS 10.2.0.3 on Microsoft Windows Server 2003 Standard Edition SP2 and IBM XSERIES_3500 Intel XEON 5130 2GHz, 4 GB of RAM