Hi, corruptions of this kind can be caused by recovery operations that 'roll through' operations that were performed as NOLOGGING. This is because Oracle can't be sure that the object was not changed so the blocks are marked as corrupt. It may be that the blocks in question are not actually in use by the object even though they are allocated to it. If this is the case they'll be formatted when they're eventually used. Oracle considers that these blocks are not in use and for that reason it reports a message and does not increment the "Pages Failing" statistics produced when dbv completes. I don't know of a way to corect this problem without recreating the object (which would certainly fix the messages). As you've already found, the object itself is not corrupted so the only problem is the spurious messages. It's up to you whether you think an ALTER TABLE MOVE is worth the hassle just to fix those messages. Of course, if someone knows a utility to un-flag a block I'm all ears. Cheers, Mike Hately -----Original Message----- From: Kaing, Leng [mailto:Leng.Kaing@xxxxxxxxxxxxxxxx] Sent: 30 January 2004 06:05 To: oracle-l@xxxxxxxxxxxxx Subject: FW: dbv - Found block already marked corrupted Importance: High > Hi Guys, >=20 > Sorry if this is covering old grounds... I ran dbv against our = datafiles and it came back with this: >=20 > Found block already marked corrupted > Block Checking: DBA =3D 29363614, Block Type =3D > Found block already marked corrupted > Block Checking: DBA =3D 29363615, Block Type =3D >=20 > I then ran cdba and converted it to fileid and blockid, analyzed the = table validate structure cascade and there was nothing wrong. Metalink = suggests that I need to recreate the object to get rid of the error. Is = this the only way? Is there a dbms_repair or something that we can do to = unmark an already marked corrupted block? >=20 > TIA, >=20 > Leng. >=20 > ---------------------------------------------------------- > Leng Kaing > Email: leng.kaing@xxxxxxxxxxxxxxxx > Phone: +61-3-9203-7589 > Mobile: +61-417-371-348 ******************************************************************************************** E mail Disclaimer You agree that you have read and understood this disclaimer and you agree to be bound by its terms. The information contained in this e-mail and any files transmitted with it (if any) are confidential and intended for the addressee only. If you have received this e-mail in error please notify the originator. This e-mail and any attachments have been scanned for certain viruses prior to sending but CE Electric UK Funding Company nor any of its associated companies from whom this e-mail originates shall be liable for any losses as a result of any viruses being passed on. No warranty of any kind is given in respect of any information contained in this e-mail and you should be aware that that it might be incomplete, out of date or incorrect. It is therefore essential that you verify all such information with us before placing any reliance upon it. CE Electric UK Funding Company Lloyds Court 78 Grey Street Newcastle upon Tyne NE1 6AF Registered in England and Wales: Number 3476201 ******************************************************************************************** ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------