{HEAD ~ The first magnetic shield} 166 and the second magnetic shield 168 may serve as {TAIL ~ the shielding} of magnetic flux from the adjacent, thus reducing the side reading and increasing the track density 
serve as
{ HEAD ~ The first magnetic shield } 166 and the second magnetic shield 168 may serve as { TAIL ~ the shielding } of magnetic flux from the adjacent , thus reducing the side reading and increasing the track density
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH