Patent ID: 8169735

Claim:
A system, comprising: a read module configured to generate read signals in response to reading servo spirals from a magnetic medium of a hard disk drive; a clock generator module configured to generate a spiral clock based on the read signals, and generate, based on the spiral clock, (i) a first write clock and (ii) a second write clock, wherein the spiral clock has a first frequency, wherein the first write clock has a second frequency, and wherein the second write clock has a third frequency; and a write module configured to write a first servo wedge on a first zone of the magnetic medium of the hard disk drive based on the first write clock, and write a second servo wedge on a second zone of the magnetic medium of the hard disk drive based on the second write clock, wherein the first zone of the magnetic medium includes portions of a first set of tracks of the magnetic medium, wherein the second zone of the magnetic medium includes portions of a second set of tracks of the magnetic medium, and wherein the first zone of the magnetic medium and the second zone of the magnetic medium are aligned along a radius of the magnetic medium.