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