Sorry that I am not sure which version of RMAN we are talking about. RMAN 8 or RMAN 9?


If it is RMAN 9 we are talking about, then

B can not be ture since filesperset is parameter to limit the number of files in one backupset, not parameter of copies.

For A, if you have RMAN 9. You can check whether controlfile autobackup is off. If it is not, turn it off. Then issue backup database/ backup datfile 1/ backup tablespace system. Then you will know the result.