Except that he says he performed full backups subsequent to the "create index...NOLOGGING" which is what you said he should have done. If your assumption is true then a NOLOGGING option is never the correct way to go (if I read your assumption correctly). His latest reply now is that he may have done some *other* NOLOGGING operations, and they may be the culprit and not the ones he mentioned originally. -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Joel Garry Sent: Friday, August 19, 2005 2:19 PM To: oracle-l@xxxxxxxxxxxxx Subject: RE: ORA-1578...block corrupted...error is normal...a block...had a NOLOGGING...operation performed against >Does the NOLOGGING attribute stay with the index after it has been created? It doesn't, >correct? Welllll... Obviously, getting the error shows that it does. And perhaps reading something into the 26040 error, it must be tracked by block, maybe something in the Integrity Section at the beginning of the block... 10g might be more informative http://download-west.oracle.com/docs/cd/B14117_01/server.101/b10755/dynv iews_1055.htm#REFRN30048 I'm also wondering if analyze...validate might tell us anything. Then again, if this is expected behavior, would it be a misfeature if analyze didn't pick it up? Joel Garry http://www.garry.to -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l