In a disk array unit, it is not necessary to make all magnetic disk units operating, in the case where the number of {TAIL ~ accesses} from {HEAD ~ the host unit} is not many 
In a disk array unit , it is not necessary to make all magnetic disk units operating , in the case where the number of { TAIL ~ accesses } from { HEAD ~ the host unit } is not many
OTH 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 OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH