{TAIL ~ Data storage device} capable of storing multiple sets of history information on {HEAD ~ input/output processing} of security data without duplication 
{ TAIL ~ Data storage device } capable of storing multiple sets of history information on { HEAD ~ input / output processing } of security data without duplication
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH