Topic: Database Administration >> Data block corruption
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| Title: Data block corruption |
| Ratnaker |
Posted: Sep 06, 2007 05:45:51 AM |
Total Post: 136
Joined: Apr, 2007
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check value in block header: 0x3ee7
computed block checksum: 0x434a
Reread of blocknum=18677, file=D:\NERVECEN\DATA\SYSAUX01.DBF. found same corrupt data
Reread of blocknum=18677, file=D:\NERVECEN\DATA\SYSAUX01.DBF. found same corrupt data
Reread of blocknum=18677, file=D:\NERVECEN\DATA\SYSAUX01.DBF. found same corrupt data
Reread of blocknum=18677, file=D:\NERVECEN\DATA\SYSAUX01.DBF. found same corrupt data
Reread of blocknum=18677, file=D:\NERVECEN\DATA\SYSAUX01.DBF. found same corrupt data
Hex dump of (file 3, block 18685) in trace file d:\nervecen\trace\udump\nervecen_ora_4380.trc
Corrupt block relative dba: 0x00c048fd (file 3, block 18685)
Fractured block found during backing up datafile
Data in bad block:
type: 6 format: 2 rdba: 0x00c048fd
Please any one can send me solution.
Ratnaker |
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 nick |
| Posted: Sep 11, 2007 11:28:00 AM |  |
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Total Post: 30
Joined: Sep, 2007
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you may need to use dbms_repair.fix_currupt_blocks package to get the resolution.
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| Nagendra |
| Posted: Sep 13, 2007 11:33:45 PM | |
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Total Post: 2
Joined: Sep, 2007
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Hi KP,
Considering the fact that this has happened in SYSAUX tablespace, you need to be careful.
The first thing is to find out what object/s are containted in the corrputed block and who owns them. You can get that by running the below.
select tablespace_name,
segment_type,
owner,
segment_name
from dba_extents
where file_id = <corrupted file id>
and block_id between block_id AND block_id + blocks-1;
If the corrputed block contains and index you can rebuild the index.
If it is a table, you can move the table to a different tablespace.
Run the above command and let me know what result you get.
Thanks
NM
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| Nagendra |
| Posted: Sep 13, 2007 11:33:52 PM | |
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Total Post: 2
Joined: Sep, 2007
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Hi KP,
Considering the fact that this has happened in SYSAUX tablespace, you need to be careful.
The first thing is to find out what object/s are containted in the corrputed block and who owns them. You can get that by running the below.
select tablespace_name,
segment_type,
owner,
segment_name
from dba_extents
where file_id = <corrupted file id>
and block_id between block_id AND block_id + blocks-1;
If the corrputed block contains and index you can rebuild the index.
If it is a table, you can move the table to a different tablespace.
Run the above command and let me know what result you get.
Thanks
NM
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| fyz |
| Posted: May 22, 2008 08:27:07 AM | |
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Total Post: 1
Joined: May, 2008
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Hi,
You may need to replace your dbf file with a backup. If you don't have any backup, I think you can try some repair tools. I have used a tool called Advanced DBF Repair to repair my DBF database. It is a powerful tool and worked well for me, but it is not free, so can be used in the end. It's websit is http://www.datanumen.com/adr/
Hope this is useful.
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