In accordance with , HDD 20 are preferentially connected to row 3 among rows 1 to 3 and then {TAIL ~ HDD} 20 are preferentially connected to {HEAD ~ row} 2 
In accordance with , HDD 20 are preferentially connected to row 3 among rows 1 to 3 and then { TAIL ~ HDD } 20 are preferentially connected to { HEAD ~ row } 2
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 OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH