I am seeking a solution for an IBM Netfinity 5000 server. I have five drives in a RAID 5 array. Each are 9GB. I know that duplexing/ mirroring is the standard but I would not want to sacrifice two drives with such a small array. Is it possible to connect a sixth drive via SCSI adapter and outside of the array and install the OS to a partition on the RAID? Much thanks for any guidance in this project.