| Found error in DBV Utility [message #456892] |
Thu, 20 May 2010 00:52  |
jimit_shaili
Messages: 237
Registered: June 2006
Location: India, Ahmedabad
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Senior Member |
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Dear Friends
I found one day, suddenly my database throws critical errors like ORA-7445,ORA-600. I find the problem sql statement from the dump file generated by error. I also search the net for overcome this situation, result is most of the suggestion are contact to oracle support and generate the SR. which is not possible for me due to some constraint. I tried to crosscheck the block corruption of my dbfile by dbv utility of oralce. i run the below command and got the following error? so please suggest me the solution for what does it mean? is my all pages are corrupted. here i'm pasting my sample of error piece, i got this message for my all pages.starting for 1 to 8605.
[oracle1@WBDevelop bin]$ dbv file=/ora9idb/odb/OH1/oradata/wbdata/wbtab03.dbf
Page 490 is marked corrupt
***
Corrupt block relative dba: 0x000001ea (file 0, block 490)
Bad header found during dbv:
Data in bad block -
type: 1 format: 0 rdba: 0x1524c303
last change scn: 0x0618.096b7807 seq: 0x1 flg: 0x0a
consistency value in tail: 0x096b7807
check value in block header: 0x12c, block checksum disabled
spare1: 0x1, spare2: 0x80, spare3: 0x70c
***
Regards
Jimit
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| Re: Found error in DBV Utility [message #456895 is a reply to message #456893] |
Thu, 20 May 2010 01:05  |
jimit_shaili
Messages: 237
Registered: June 2006
Location: India, Ahmedabad
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Senior Member |
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Dear Michel
At the time of running dbv utility of oracle, my database is up and running. should i need to shutdown the database and recheck my dbfiles with dbv utility again. please suggest me the way how can i recover my data from this corrupted pages. suggest some oracle utility or package which can recover this data.
Regards
Jimit
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| Re: Found error in DBV Utility [message #456898 is a reply to message #456897] |
Thu, 20 May 2010 01:15 |
jimit_shaili
Messages: 237
Registered: June 2006
Location: India, Ahmedabad
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Senior Member |
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Dear Michel
Can i do one thing, if i move all my tables to new tablespace, or export the tables,truncate tables and drop tables then import it..... which are included in above problem query which is generating critical errors. Is there any possibility of recovering from error by these way.
Regards
Jimit
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| Re: Found error in DBV Utility [message #456904 is a reply to message #456898] |
Thu, 20 May 2010 01:51 |
John Watson
Messages: 8964
Registered: January 2010
Location: Global Village
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Senior Member |
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You can use dbms_repair.fix_corrupt_blocks and dbms_repair.skip_corrupt_blocks procedures to make the objects usable, but the data in them is gone and you may have some interesting results with subsequent queries depending on whether the corrupted blocks are table or index blocks. It is sometimes possible to recover the entire table in this way: it may be that the corrupted blocks do not actually have any rows.
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| Re: Found error in DBV Utility [message #457073 is a reply to message #456904] |
Fri, 21 May 2010 00:18 |
jimit_shaili
Messages: 237
Registered: June 2006
Location: India, Ahmedabad
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Senior Member |
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Dear Friends
Thanks for replies.After getting so depressed answer i search little beat more on dbv utility and found that sometime in linux os u must have to specify the blocksize clause of dbv utility. Then i tried following command.which display that there is no page or block corruption found via oracle. But still i have to search more for how get read of ORA-7445
[oracle1@WBDevelop odb]$ dbv file=/ora9idb/odb/OH1/oradata/wbdata/wbtab03.dbf
BLOCKSIZE=8192
DBVERIFY: Release 9.2.0.1.0 - Production on Fri May 21 10:42:34 2010
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
DBVERIFY - Verification starting : FILE = /ora9idb/odb/OH1/oradata/wbdata/wbtab0
3.dbf
DBVERIFY - Verification complete
Total Pages Examined : 31416
Total Pages Processed (Data) : 24676
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 5499
Total Pages Failing (Index): 0
Total Pages Processed (Other): 201
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 1040
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
[oracle1@WBDevelop odb]$
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| Re: Found error in DBV Utility [message #457233 is a reply to message #457095] |
Sat, 22 May 2010 04:59 |
jimit_shaili
Messages: 237
Registered: June 2006
Location: India, Ahmedabad
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Senior Member |
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Dear Michel and friends
As to overcome the ORA-07445 error we have done following thing, which are work perfectly in our case. It may not be the best solution in each condition. We find the tables from the query generated in dump file, then we create a new tablespace and move all the problematic tables to that tablespace, then we rebuild our indexes of those tables. And amazingly it works. Please let us know your personal take on this solution.
Regards
Jimit
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| Re: Found error in DBV Utility [message #457252 is a reply to message #457233] |
Sat, 22 May 2010 09:30 |
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Michel Cadot
Messages: 68731
Registered: March 2007
Location: Saint-Maur, France, https...
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Senior Member
Account Moderator |
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ORA-07445 is a generic error, you've been lucky to solve your current issue with this solution (but is this durable?) and trace file is mandatory to debug it and most of the time only Oracle can read the dump.
Regards
Michel
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