Are you allocating two channels (do you have parallelism configured to 2)? If so, this is probably why it is splitting up your files. If you use just one channel (no parallelism), then you should get just one large file. RMAN> show all; . . . CONFIGURE DEVICE TYPE SBT_TAPE PARALLELISM 1; # default CONFIGURE DEVICE TYPE DISK PARALLELISM 1; # default . . . Regards, Brandon -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of dba1 mcc Sent: Monday, July 18, 2005 7:23 AM To: oracle-l@xxxxxxxxxxxxx Subject: [Q] RMAN backup as one big file problem? We have ORACLE 9.2.0.6 on LINUX server. The database have 4 datafiles system undo data index While we doing RMAN backup we specify "backup database filesperset=6;", RMAN does NOT backup all 4 datafiles to one big file. It backup system, undo and data files as one file. It also backup index as another file. Does their has way to make RMAN backup all datafile as one big file? Thanks. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- //www.freelists.org/webpage/oracle-l Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it. -- //www.freelists.org/webpage/oracle-l