{TAIL ~ The boundary LBA} is stored in {HEAD ~ the memory}, the register, etc. of the disk array control device 12 
{ TAIL ~ The boundary LBA } is stored in { HEAD ~ the memory } , the register , etc . of the disk array control device 12
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH