Patent ID: 8625219

Claim:
A magnetic disk, comprising: a plurality of concentric zones comprising: an alternating series of servo zones and dual frequency zones, and a bootstrap zone; wherein a servo frequency of each servo zone is different from the servo frequency of the other servo zones, wherein the servo zones are patterned from the inner diameter of the magnetic disk to the outer diameter of the magnetic disk according to increasing servo frequency, wherein each servo zone comprises a plurality of servo patterns, wherein each dual frequency zone comprises a first set of overlap patterns, wherein each dual frequency zone comprises a second set of overlap patterns, wherein the first set of overlap patterns are patterned with a substantially identical pattern as the bordering lower frequency servo zone, wherein the second set of the overlap patterns are patterned with a substantially identical pattern as the bordering higher frequency servo zone, and wherein at least one of the servo zones borders the bootstrap zone, wherein the bootstrap zone comprises a third set of overlap patterns; and wherein the bootstrap zone comprises a plurality of bootstrap patterns.