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