A case, view trace file found the following error message
D:\oracle\product\10.2.0\admin\dbserver\udump\orcl_ora_5888.trc
Corrupt block relative dba:0x09848269 (file 295529)
Bad header found during buffer read
Data in bad block:
Type:1 Format:5 rdba:0x30322d2d
Last Change Scn:0xfffe.fffefffe Seq:0xfe flg:0xff
spare1:0x0 spare2:0x30 spare3:0x0
Consistency value in tail:0x2d2d3533
Check value in block Header:0xfffe
Computed Block checksum:0x91f9
Reread of rdba:0x09848269 (file, block 295529) found same corrupted data
Fri Dec 27 08:28:08 2013
Corrupt block Found
TSN = Tsname = Hghis
RFN = BLK = 295529, rdba = 159679081
Objn = 119544, OBJD = 119544, OBJECT = emr_monitor_result, subobject =
SEGMENT OWNER = hghis, SEGMENT TYPE = Table SEGMENT
Fri Dec 27 08:54:18 2013
Hex Dump of (file, block 295561) in trace file d:\oracle\product\10.2.0\admin\dbserver\udump\orcl_ora_6796.trc
Corrupt block relative dba:0x09848289 (file 295561)
Bad header found during buffer read
Data in bad block:
type:48 format:0 rdba:0x020cc100
Last Change scn:0xb500.080cc100 seq:0xa5 flg:0xba
Spare1:0x34 spare2:0x2 Spare3:0xb0b8
Consistency value in tail:0x395e3031
Check value in block HEADER:0XCFCB
Block checksum disabled
Reread of rdba:0x09848289 (file, block 295561) found same corrupted data
Fri Dec 27 08:54:19 2013
Corrupt block Found
TSN = Tsname = Hghis
RFN = BLK = 295561, rdba = 159679113
Objn = 119494, OBJD = 119494, OBJECT = sys_lob0000119493c00006$$, subobject =
SEGMENT OWNER = hghis, SEGMENT TYPE = Lob SEGMENT
Fri Dec 27 09:11:20 2013
Hex Dump of (file, block 295563) in trace file d:\oracle\product\10.2.0\admin\dbserver\udump\orcl_ora_5584.trc
Corrupt block relative dba:0x0984828b (file 295563)
Bad header found during buffer read
Data in bad block:
type:71 Format:7 rdba:0x064d0001
Last Change scn:0x3038.43584400 seq:0x31 flg:0x07
spare1:0x44 spare2:0x4c spare3:0x771
Consistency value in tail:0x000a0000
Check value in block header:0x7800
Computed Block Checksum:0xcbf8
Reread of rdba:0x0984828b (file, block 295563) found same corrupted data
Fri Dec 27 09:11:21 2013
Corrupt block Found
TSN = Tsname = Hghis
RFN = BLK = 295563, rdba = 159679115
Objn = 119494, OBJD = 119494, OBJECT = sys_lob0000119493c00006$$, subobject =
SEGMENT OWNER = hghis, SEGMENT TYPE = Lob SEGMENT
Fri Dec 27 09:27:59 2013
According to the above information that 38th data file 295529, 295561, 295563 is bad block, you can use the DBV tool or Rman to check the bad block information
DBV file= "D:\oradata\DATA. DBF "blocksize=8192
Or
Rman Target/
Backup validate check logical database;
SELECT * from V$database_block_corruption;