Multiplex control files and redo log files on RAID disks

 Hi,

Oracle recommends multiplexing the control files and redo log files on separate disks.  With RAID managing multiple disks into one single disk space, does it make any differences if the copies of control files and redo log files are stored under separate directories as compared to under the same directory?  What is the best practice in multiplexing in this case?

Thanks,

Simon