We had a session with an expert on Monday and he recommended export to \dev\nul to detect errors in the database.
Yechiel Adar Mehish ----- Original Message ----- To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> Sent: Monday, February 24, 2003 10:41 PM > I had the same belief that RMAN catches the corruption earlier, but not NOW. > > We had a database crash two months back and while performing the > recovery(RMAN) one of the restored data file was corrupted. *BIG SHOCK* to > everyone..We ran the dbverify on the restored files, the corruption showed > up easily.. But not a single clue on the RMAN backup logs'. > > We asked Oracle Support, if rman checks for corruption in the data files > when the data files are being backed up.. He said "No".. > > Oracle Ver: 8.1.7.2/Sun 2.6 > > > ..Ponnusamy > > At 11:40 AM 2/24/2003 -0800, DENNIS WILLIAMS wrote: > >Stephen > > RMAN ignored your corrupted block? Ya gotta tell us more man! We're > >relying on it to catch everything. Did you have the MAXCORRUPT parameter > >set? > > > >Dennis Williams > >DBA, 40%OCP, 100% DBA > >Lifetouch, Inc. > >[EMAIL PROTECTED] > > > > > >-----Original Message----- > >Sent: Monday, February 24, 2003 11:45 AM > >To: Multiple recipients of list ORACLE-L > > > > > > > >I think more recent versions of Oracle have options for skipping corrupt > >blocks with exports. > > > >One possible way: > >If you have a valid primary key index on the table, and the index is in a > >good tablespace, you might be able to cycle through all the primary keys, > >select the row corresponding to that primary key and insert it into a new > >table. I was able to do this about a month ago with a 8.1.7 database. In > >my case, I think it was a block header that was corrupt, not data; so I got > >all the data OK. It was rather slow, grabbing and inserting one row at a > >time; but I got all the data. As long as I didn't do anything that would > >cause a table scan of any kind, I could get the data. > > > >By the way, rman not only failed to spot the corruption, but backed it up > >AND restored the corruption! My initial attempt was to just rename the > >datafile at the file system level, then recover it from the previous backup. > >I could relate another one of those TAR non-support -- total and complete > >NON-support! -- on this one. > > > > > -----Original Message----- > > > > > > So my question is, if all backups contain the corrupted > > > block, how would > > > I copy all non-corrupted blocks from this table into a new table? > > > > >-- > >Please see the official ORACLE-L FAQ: http://www.orafaq.net > >-- > >Author: Stephen Lee > > INET: [EMAIL PROTECTED] > > > >Fat City Network Services -- 858-538-5051 http://www.fatcity.com > >San Diego, California -- Mailing list and web hosting services > >--------------------------------------------------------------------- > >To REMOVE yourself from this mailing list, send an E-Mail message > >to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > >the message BODY, include a line containing: UNSUB ORACLE-L > >(or the name of mailing list you want to be removed from). You may > >also send the HELP command for other information (like subscribing). > >-- > >Please see the official ORACLE-L FAQ: http://www.orafaq.net > >-- > >Author: DENNIS WILLIAMS > > INET: [EMAIL PROTECTED] > > > >Fat City Network Services -- 858-538-5051 http://www.fatcity.com > >San Diego, California -- Mailing list and web hosting services > >--------------------------------------------------------------------- > >To REMOVE yourself from this mailing list, send an E-Mail message > >to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > >the message BODY, include a line containing: UNSUB ORACLE-L > >(or the name of mailing list you want to be removed from). You may > >also send the HELP command for other information (like subscribing). > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Ponnusamy > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Yechiel Adar INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).