The storage control unit receives and processes {HEAD ~ write requests} from the host devices and directs that data updates be temporarily stored in the cache in one cluster and copied to the NVS of {TAIL ~ the other cluster} 
The storage control unit receives and processes { HEAD ~ write requests } from the host devices and directs that data updates be temporarily stored in the cache in one cluster and copied to the NVS of { TAIL ~ the other cluster }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL