{TAIL ~ The variable resistive elements} of all memory cells in the memory cell array are set to the highest of {HEAD ~ the two or more different resistance states} in an unused state before the memory cell array is used to store the user data 
{ TAIL ~ The variable resistive elements } of all memory cells in the memory cell array are set to the highest of { HEAD ~ the two or more different resistance states } in an unused state before the memory cell array is used to store the user data
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH