Oracle Database Discussions

Hi I trying to configure rman backups using a NFS mounted filesystem so that I can give another system access to the backup sets so that I can make clones of the database using RMAN duplicate.
I have an rman script that I created that sets up the channels as I have done in the past but the only differnce is that is the past my disk channels were actually configured to write to an ASM diskgroup name as opposed to how I am doing it now which is configuring the channel to just point to the nfs mounted file system as in this example...
run {
allocate channel ch1 device type disk format '/rmanbackups/backupsets/';
allocate channel ch2 device type disk format '/rmanbackups/backupsets/';
allocate channel ch3 device type disk format '/rmanbackups/backupsets/';
sql 'alter system archive log current';
backup incremental level 0 filesperset 10 database;
backup archivelog all;
backup current controlfile; }

The problem I am seeing and the big difference from when I used to use ASM is that when I use the above script the rman session is creating everything as a file name backupsets where in the past when using ASM it would automatically create a backupsets directory and also a directory with the date of when the backupset was created. I thought this would also happen automatically with the NFS mount point setup as the disk chanel but this is not that case and it is literally trying to create the backupset with whatever name I put in the channel configuration script....
Any thoughts on this would be greatly welcomed.
Thanks in advance.