data block corruption
From alert file, I can see there are data block corrupted. See alert file below:
Tue Dec 31 04:20:00 2013
Errors in file /urac01/app/oracle/diag/rdbms/dev1113/dev11131/trace/dev11131_m000_29196.trc (incident=49303):
ORA-01578: ORACLE data block corrupted (file # 35, block # 2)
ORA-01110: data file 35: '+DATA02/dev1113/datafile/pathlore_index1.dbf'
Incident details in: /urac01/app/oracle/diag/rdbms/dev1113/dev11131/incident/incdir_49303/dev11131_m000_29196_i49303.trc
Tue Dec 31 04:20:04 2013
Dumping diagnostic data in directory=[cdmp_20131231042004], requested by (instance=1, osid=29196 (M000)), summary=[incident=49303].
Errors in file /urac01/app/oracle/diag/rdbms/dev1113/dev11131/trace/dev11131_m000_29196.trc (incident=49304):
ORA-01578: ORACLE data block corrupted (file # 36, block # 2)