http://help.sap.com/saphelp_nw04/helpdata/en/e6/f3d0ed99634078be2da254b97104d7/content.htm
Restore full database:
brrestore -d util_file -p init<SID>.sap.online -m full -b <backup log file to use>
Restore individual datafiles:
brrestore -d util_file -p init<SID>.sap.online -m <file number> -b <backup log file to use>
File number is the Oracle file number. To list the Oracle file numbers in the original database:
select file#, name from v$datafile;
FILE# NAME
----------------------------------------------
1 /oracle/ECY/sapdata1/system_1/system.data1
2 /oracle/ECY/sapdata1/undo_1/undo.data1
3 /oracle/ECY/sapdata1/sysaux_1/sysaux.data1...
Restore archive log files:
brrestore -a util_file -p init<SID>.sap.online -m <file number> -b <backup log file to use>