Patent ID: 7372658

Claim:
A servo writing method for writing servo signals to each track on a disk surface, comprising the steps of: measuring position error components synchronizing the rotation of at least one track of said disk from an average waveform of said position signals while writing said servo signals to said track; correcting said measured position error components using a single adjusted gain based on a ratio of the magnitude between components synchronizing rotation of said disk and components not synchronizing rotation of said disk in said position signals; writing said servo signal to another track of said disk using said corrected position error components of said one track; measuring position error components synchronizing the rotation of said disk from an average waveform of said position signals in each track in said disk; correcting said measured position error components of said each track using an adjusted gain, based on a ratio of the magnitude between components synchronizing rotation of said disk and components not synchronizing rotation of said disk in said position signal; and storing said corrected position error components of each said track in a correction table.