wherein a second disk device is coupled to said intermediary device via a second disk port of {TAIL ~ the second disk device} and {HEAD ~ a second intermediary port} of the intermediary device and 
wherein a second disk device is coupled to said intermediary device via a second disk port of { TAIL ~ the second disk device } and { HEAD ~ a second intermediary port } of the intermediary device and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH