A patterned recording media comprises a segment and a null pattern formed
in the segment. The segment comprises first and second rows of discrete
magnetic elements separated by a non-magnetic material, and a row of
non-magnetic material positioned between the first and second rows. The
null pattern comprises consecutive groups of the discrete magnetic
elements in the first and second rows of the segment. Each group in the
first row has a magnetic polarity that is opposite the magnetic polarity
of adjoining groups in the first row. Each group in the second row has a
magnetic polarity that is opposite the magnetic polarity of adjoining
groups in the second row.