The tape layout with RMAN is basically the same as the backup methods without RMAN. This means that you do not have to reinitialize the tapes if you are using the SAP implementation of the System Backup to Tape (SBT) interface – that is, the SAP backup library.
BRBACKUP uses cpio to back up the tape administration information (that is, the tape label) and the initialization files init<DBSID>.ora and init<DBSID>.sap to tape, as follows:
1. The SAP backup library backs up the save sets to tape directly or using dd.
2. BRBACKUP uses cpio to back up the control file and the log files to tape.
The control file is backup with dd if tape_copy_cmd = rman_dd is set.