Paula, According the the Oracle RMAN class documentation you can't run a 9i database in a 10g catalog. I haven't actually tested this to confirm it though. "The RMAN catalog schema version (meaning, the version of RMAN that created or updated the schema) should be equal or later than the catalog database version." Thanks, Jay Miller Sr. Oracle DBA -----Original Message----- From: Paula_Stankus@xxxxxxxxxxxxxxx [mailto:Paula_Stankus@xxxxxxxxxxxxxxx] Sent: Wednesday, October 05, 2005 1:20 PM To: oracle-l@xxxxxxxxxxxxx Subject: RE: RMAN 10G compression Some questions if anyone has already travelled this ground: -How much does RMAN compress? -Can you compress a backup if RMAN is 10G or does the target database have to be 10G? -Speed difference w/ compression and w/o compression We are going to start testing. However, if someone has already tested this ground? Also, is there a way I can cleanly move over my rman catalog information for 1 9i database target from a 9i RMAN catalog to a 10G Rman catalog. -- //www.freelists.org/webpage/oracle-l ----------------------------------------- This message is confidential and sent by TD Waterhouse solely for use by the intended recipient. If you are not the intended recipient, you are hereby notified that any use, distribution or copying of this communication is strictly prohibited. This should not be deemed as an offer or solicitation, to buy or sell any product. Any 3rd party information contained herein was prepared by sources deemed reliable, but is not guaranteed. TD Waterhouse does not accept electronic instructions that would require an original signature. Information received by or sent from TD Waterhouse is stored, subject to review, and may be produced to regulatory authorities or others with a legal right to such. -- //www.freelists.org/webpage/oracle-l