The method 5, wherein said writing {TAIL ~ all} of the cells in {HEAD ~ said sector comprises}: 
The method 5 , wherein said writing { TAIL ~ all } of the cells in { HEAD ~ said sector comprises } :
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH