FRA´s datafile directory and tape backups

Hi again,
I have tried to find relevant information for my question, but instead of finding answers (again) which may or may not be helpful I hope someone can explain me.
We are running 10Gr2 databases with FRA´s enabled, currently backupping all using Oracle´s suggested backup to Disk devices.
Since we have copies of the datafiles in the FRA which takes up quite some (productional) storage space we are asked to stop the Disk backups, and backup things up to the tape device, which underwater is a TSM library.
How would this affect the occupance of the FRA? Will the datafile directory in the FRA be moved to the "tape" device if we implement (solely) tape backups; or is it only the backupsets and autobackups which would then be moved to tape?
I have tried several setups for which I wanted to set the datafile, backupset and autobackup directory out of the FRA, but I have not found a (working) way yet to set the datafile directory apart from it.
Advice or help are greatly appreciated.
Robin

Changing the backup location from FRA to an external device will only effect backups (backupsets or image copies of datafiles,controlfiles,spfile,archivelogs). Possible (but not mandatory) components of FRA are archivelogs,backup pieces,controlfiles,online logs,image copies and flashback logs.
For performance reasons it's better to continue using the FRA as first backup device. Extend your backup strategy by backing the FRA itself to tape in regular intervals.
'BACKUP RECOVERY AREA' backs up recovery files created in the current and all previous flash recovery area destinations. Recovery files are full and incremental backup sets, control file autobackups, archived logs, and datafile copies. Flashback logs, the current control file, and online redo logs are not backed up.
The backup must go to a tape device, so RMAN issues an error if no sbt channels are allocated or configured.
Or use
'BACKUP RECOVERY FILES'. It backs up all recovery files on disk, whether they are stored in the flash recovery area or another locations on disk. Recovery files include full and incremental backup sets, control file autobackups, archived logs, and datafile copies.
Werner

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