The disk drive stores a plurality of {TAIL ~ pages} of video data, each page corresponding to the capacity of {HEAD ~ the random access memory} 
The disk drive stores a plurality of { TAIL ~ pages } of video data , each page corresponding to the capacity of { HEAD ~ the random access memory }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD