RE: Query Fails for particular date

It is sometime possible to repair a corrupt block depending on the issue.

If the corruption is in the row data then you can generally delete the one row and re-insert it.

If the corruption is in the header somewhere but the header row table is OK you might be able to extract all the data.

See the dbms_repair package as user sys.

• Mark D Powell -- Phone (313) 592-5148

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of D'Hooge Freek Sent: Wednesday, July 22, 2009 2:26 AM
To: nagaraj.chk_at_gmail.com
Cc: oracle-l
Subject: RE: Query Fails for particular date

Hi,

That depends on your backup strategy.
If you are using rman, you could try block level recovery. Otherwise you need to restore the datafile from a time before the corruption. But you said that you already needed to restored this datafile last month, so it could be that the corruption was already there since long time.

Maybe it is best to open a case with oracle to see how to proceed further?

regards,

Freek D'Hooge
Uptime
Oracle Database Administrator
e-mail: freek.dhooge_at_uptime.be
tel. +32 (0)3 451 23 82
http://www.uptime.be
disclaimer

From: oracle-l-bounce_at_freelists.org [oracle-l-bounce_at_freelists.org] On Behalf Of Nagaraj S [nagaraj.chk_at_gmail.com] Sent: 21 July 2009 23:17
To: D'Hooge Freek
Cc: oracle-l
Subject: Re: Query Fails for particular date

Your right Freek. the datafile show block corruption. How to proceed now

Page 2969392 is marked corrupt
Corrupt block relative dba: 0x18ed4f30 (file 99, block 2969392) Completely zero block found during dbv:

DBVERIFY - Verification complete

Total Pages Examined         : 3628808
Total Pages Processed (Data) : 0
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 2340725
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 41655
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 1245484
Total Pages Marked Corrupt   : 944
Total Pages Influx           : 0
Highest block SCN            : 1597765560 (1267.1597765560)

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http://www.freelists.org/webpage/oracle-l Received on Wed Jul 22 2009 - 15:34:31 CDT