Data check circuit of magnetic disk device and {HEAD ~ data checking method} of {TAIL ~ magnetic disk device} 
of
Data check circuit of magnetic disk device and { HEAD ~ data checking method } of { TAIL ~ magnetic disk device }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL