Oracle Database Discussions

when i try to take export its show error

EXP-00008: ORACLE error 1578 encountered
ORA-01578: ORACLE data block corrupted (file # 1, block # 1434)
ORA-01110: data file 1: '/u04/BURST/system01.dbf'
EXP-00000: Export terminated unsuccessfully


i check system01.dbf datafile

dbv file=/u04/BURST/system01.dbf feedback=100

DBVERIFY: Release 10.1.0.3.0 - Production on Fri Nov 23 15:29:36 2007

Copyright (c) 1982, 2004, Oracle. All rights reserved.

DBVERIFY - Verification starting : FILE = /u04/BURST/system01.dbf
..............
DBV-00200: Block, dba 4195738, already marked corrupted
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DBVERIFY - Verification complete

Total Pages Examined : 66560
Total Pages Processed (Data) : 39779
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 8121
Total Pages Failing (Index): 0
Total Pages Processed (Other): 1607
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 17053
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
Highest block SCN : 398349542 (0.398349542)


i Execute the following query to Identify the object owning the
corrupted block.

SELECT tablespace_name, segment_type, owner, segment_name
FROM dba_extents
WHERE file_id = 1
and 1434 between block_id AND block_id + blocks - 1;

output of query

tablespace_name=system
segment_type=table
owner=sys
segment_name=job$

i Run analyze on the object returned by the above query

sql> Analyze table job$ validate structure cascade;

ERROR at line 1:
ORA-01578: ORACLE data block corrupted (file # 1, block # 1434)
ORA-01110: data file 1: '/u04/BURST/system01.dbf'


i chect it again in the system01.dbf datafile through dbv it will not repair...


suggest me what i can do ..as soon as possible..