While doing DR rebuild ( physical standby ), after restoring standby controlfile in DR location, i am getting below error while restoring database. I took backup through RMAN ( hotbackup ) from primary database. RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of restore command at 03/10/2010 11:58:32 RMAN-06026: some targets not found - aborting restore RMAN-06023: no backup or copy of datafile 28 found to restore RMAN-06023: no backup or copy of datafile 27 found to restore As part of trouble shooting, we tried with validate backupset and found that some of backupsets dont contain data. Error in alert log file shows below error. Error validating file dummy (5) in piece /backup/ora_backup/gll88kta_9_1: missing header Error validating file dummy (19) in piece /backup/ora_backup/gll88kta_9_1: missing header Error validating file dummy (27) in piece /backup/ora_backup/gll88kta_9_1: missing header Error validating file dummy (28) in piece /backup/ora_backup/gll88kta_9_1: missing header Previously we were succesful with this process. Can you please give some tips to find out why backup from production is corrupted / not complete ? Environment sun solaris 10 oracle 10.2.0.4 dual node RAC -- Harshan Eppurath 040-40214832 09391455712