Hi all, I just got a corrupt block again, had fixed a block corruption in a same index file two weeks ago. Don't know why this happened twice in such a sort period. I tried rman validate and dbverify to detect the corruption, but rman validate did not report any data corruption while dbverify did. Could anyone shed any light on this? Thanks, Lu The following is the output from rman validate and dbverify. Using backup validate: RMAN> backup check logical validate datafile 'F:\ORACLE\ERPPROD\DB\APPS_ST\DATA\A_TXN_IND01.DBF'; Starting backup at 28-DEC-11 using channel ORA_DISK_1 channel ORA_DISK_1: starting full datafile backupset channel ORA_DISK_1: specifying datafile(s) in backupset input datafile fnochannel ORA_DISK_1: backup set complete, elapsed time: 00:00:25 Finished backup at 28-DEC-11 Using dbverify: dbv FILE=F:\ORACLE\ERPPROD\DB\APPS_ST\DATA\A_TXN_IND01.DBF FEEDBACK0 Corrupt block relative dba: 0x06426321 (file 25, block 156449) Bad check value found during dbv: ....... DBVERIFY - Verification complete Total Pages Examined : 393216 Total Pages Processed (Data) : 2782 Total Pages Failing (Data) : 0 Total Pages Processed (Index): 93966 Total Pages Failing (Index): 0 Total Pages Processed (Other): 19301 Total Pages Processed (Seg) : 0 Total Pages Failing (Seg) : 0 Total Pages Empty : 277166 Total Pages Marked Corrupt : 1 Total Pages Influx : 0 Highest block SCN : 1326171528 (0.1326171528) Looks rman validate did not ddetect any data corruption while dbverify did. -- //www.freelists.org/webpage/oracle-l