RE: Help - Corrupted Block - Lob Segment - NOLOGGING

Thanks for the suggestion. The documentation says the dbms_repair ignores "out-of-line" lobs. Our corrupted block is an out-of-line lob, so I don't think this will work for us. I passed this on to Oracle Support anyway, to see what they will do.

> It's either DBMS_REPAIR or your harvest has failed
Hmmmm, that is interesting. The name of the product is Harvest, and the vendor is CA.

Thanks,

Sam.

-----Original Message-----
From: Mladen Gogala [mailto:mgogala_at_verizon.net] Sent: Monday, October 23, 2006 9:36 PM
To: Sam Bootsma
Cc: oracle-l_at_freelists.org
Subject: Re: Help - Corrupted Block - Lob Segment - NOLOGGING

On 10/23/2006 02:46:43 PM, Sam Bootsma wrote:

> Documents are stored in a BLOB column in an Oracle table. It is NOT
> stored "in_row" and logging is turned off (for performance reasons
they
> told me).

The problem with "NOLOGGING" is the fact that your blocks are no longer protected
by logging mechanism, which means that you cannot recover them. That's excellent
for performance - until you have to recover. The general advice for nologging is to
to use it for things that can be easily re-created, like indexes or MV's.

>
> We recently encountered a bad block, and I have since determined there
> are additional bad blocks, but it is just one block that is
continually
> giving us a problem.
>
> When a user attempts to check an object into the repository, they
often
> get the error message:
>
> E03020003: Database Error: [CAI/PT][ODBC Oracle 8
> driver][Oracle]ORA-01578: ORACLE data block corrupted (file # 31,
block
> # 123533)
> ORA-01110: data file 31: '/san1/oradata/PROD/harvestblob01.dbf'
> ORA-26040: Data block was loaded using the NOLOGGING option

It's either DBMS_REPAIR or your harvest has failed. Position of a DBA is comparable
to the position of a director of FEMA. It's a very comfortable position, until disaster
strikes.....May Bacchus, the god of harvest be with you.

-- 
Mladen Gogala
http://www.mladen-gogala.com

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