Abstract: A disc drive is disclosed having servo information written to one or more discs of the disc drive at a frequency that varies for each of the tracks defined on the disc, the servo information read by and used to control the position of an associated head of the disc drive. The servo information is preferably constant density and arranged as a plurality of servo strips extending radially from an inner to an outer diameter of the disc, each servo strip comprising a plurality of servo fields, the servo fields defining the tracks on the disc.

Abstract: An apparatus and associated method are disclosed for storing servo information on a rotatable disc of a disc drive at a frequency that varies for each track defined on the disc. A servo track writing system is provided which generates a fixed frequency pattern clock signal that indicates the appropriate angular locations on the disc at which the servo information is to be written, and a servo write clock signal having a selectively variable frequency at which the servo information is written. A reset pulse temporarily suspends and restarts the servo write clock signal so as to be in phase with the pattern clock signal at the initiation of the output of the servo information.