Patent ID: 8873179

Claim:
A bit-patterned-media magnetic recording disk having a substrate and a magnetic recording layer on the substrate, the recording layer comprising two sizes of generally circularly-shaped magnetic dots forming a plurality of radially-spaced tracks having data sectors and servo sectors, wherein the data sectors contain dots of both sizes arranged together in a generally hexagonal-close-packed pattern, wherein the servo sectors extend radially across the tracks and contain dots of both sizes arranged together in a generally hexagonal-close-packed pattern, the servo sectors including at least two circumferentially-adjacent burst regions, each burst region containing a pattern of radially-spaced blocks of at least four adjacent larger sized dots that form the burst, each burst block extending across at least two tracks and together with surrounding smaller sized dots forming part of a hexagonal-close-packed pattern, and wherein the pattern of burst blocks in one of said at least two circumferentially-adjacent burst regions is radially spaced from the pattern of burst blocks in the other of said at least two circumferentially-adjacent burst regions.