Hey guys, I need to refresh a QA database from production with the exception of 2 archive tablespaces. These tablespaces were backed up in read-write mode from production and I am going to use that backup piece to restore and recover. Can I switch these 2 tablespaces to read only mode before issuing the duplicate db rman command and rman will skip these (using "skip readonly" ) OR do I need to first back these up as read only tablespaces for rman to skip these during the duplicate. In other words, where does rman "skip readonly" command check for the status of the tablespace, current target database or the information in the rman catalog? Thanks much. Amit Verma