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