I thought the active database does NOT make a backup and push it across, it pushed the datafiles as they are. Hey any of you internals DBAs is that not correct? I've not done it between 2 different ASM groups but from what I see of your command that should work. joe _______________________________________ Joe Testa, Oracle Certified Professional Senior Engineering & Administration Lead (Work) 614-677-1668 (Cell) 614-312-6715 Interested in helping out your marriage? Ask me about "Weekend to Remember" Feb 12-Feb 14, 2010, Valentine's Day Weekend in Akron, OH From: Manmohan Jalsingh <mjalsingh@xxxxxxxxx> To: oracle-l@xxxxxxxxxxxxx Date: 12/18/2009 01:18 PM Subject: 11g Active Database Duplication Sent by: oracle-l-bounce@xxxxxxxxxxxxx Hi , Has anyone used this feature (in version 11.1.0.7) successfully to clone a database between two servers which uses different ASM diskgroups. I am trying to create a clone using following rman script which is failing during restore. Oracle support told me that RMAN first creates a copy backup of the primary database on **source server** and then transfer it to target to build the clone copy. Is that correct? Why it needs to create a copy on source ? run { DUPLICATE TARGET DATABASE TO 'DUPDB' FROM ACTIVE DATABASE db_file_name_convert='+DATA1/ORCL','+DATA2/DUPDB' } Errors during the restore - Starting backup at 17-DEC-09 allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=376 instance=orcl3 device type=DISK channel ORA_DISK_1: starting datafile copy input datafile file number=00007 name=+DATA1/orcl/datafile/index.500.704464441 RMAN-03009: failure of backup command on ORA_DISK_1 channel at 12/17/2009 12:15:47 ORA-19504: failed to create file "+data2" channel ORA_DISK_1 disabled, job failed on it will be run on another channel Thanks Manmohan.