Re: Datafile Corruption ........... or Not

Kevin Lange wrote:
>
> Hey gang;
> I have an 8.0.5.0 database running on a Solaris platform.
>
> The developer is running a simple query which returns the error
>
> ERROR at line 1:
> ORA-01578: ORACLE data block corrupted (file # 7, block # 191659)
> ORA-01110: data file 7: '/u08/oradata/TTCT/dynamici01.dbf'
>
> So I run dbverify (dbv) against the file and it says all is OK.
>
> $ dbv file=dynamici01.dbf
> DBVERIFY: Release 8.0.5.0.0 - Production on Tue May 28 13:2:7 2002
> (c) Copyright 1998 Oracle Corporation. All rights reserved.
> DBVERIFY - Verification starting : FILE = dynamici01.dbf
> DBVERIFY - Verification complete
> Total Pages Examined : 409600
> Total Pages Processed (Data) : 0
> Total Pages Failing (Data) : 0
> Total Pages Processed (Index): 158376
> Total Pages Failing (Index): 0
> Total Pages Empty : 0
> Total Pages Marked Corrupt : 0
> Total Pages Influx : 0
>
> Does anyone have any suggestions about this other than rebuilding the
> database (it is a clone of our production ... it will just set the developer
> back if we have to clone it) ?
>
> Thanks
>
> Kevin

Kevin,

   Try to check what kind of segment this block belongs to (DBA_EXTENTS + DBA_SEGMENTS - extents are identified by the block# of their first block plus the number of contiguous blocks, so you have tolook for the extent for which 191659 is >= first block and < first block + extent size.
It will tell you whether it's a table (and which one), index, temp or rollback segment, and you will be better armed to take a decision. There may be less time-costly than cloning the production database again.

-- 
Regards,

Stephane Faroult
Oriole Software
-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Stephane Faroult
  INET: sfaroult_at_oriole.com

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