
System altered.

select * from hr.regions2
                 *
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 8, block # 131) 
ORA-01110: data file 8: '/u01/app/oracle/oradata/example2.dbf' 


select * from hr.locations2
                 *
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 8, block # 139) 
ORA-01110: data file 8: '/u01/app/oracle/oradata/example2.dbf' 


select * from hr.employees2
                 *
ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 8, block # 147) 
ORA-01110: data file 8: '/u01/app/oracle/oradata/example2.dbf' 


