Patent ID: 7881004
Filing Date: 2011-02-01
Classification: G11B

Abstract:
1. A method of adaptive track shape control during a self servo-write process, said method comprising: detecting a first error in a targeted path for writing servo data onto a first track of a disk; correlating said first error with a second error for a targeted path in a previously written track of said disk which is separated from said first track by one read/write offset whereby said correlating said previously written track is based upon a read/write offset of a writing element and a reading element disposed within a read/write head; generating a correction for a feed-forward signal used to position a writing element which is used to write servo data for a subsequent track of said disk; wherein said correlating further comprises: performing a discrete Fourier transform of a position error signal to determine said frequency harmonic of said first error; performing a discrete Fourier transform of a second position error signal to determine the frequency of said second error; accessing an offset between said writing element and a read element of a read/write head based upon a location of either of said first track and of said second track on said disk; and determining a measured sensitivity to each of a plurality of burst signals.