Patent ID: 6999263

Claim:
A method for writing servo burst patterns for tracks on a rotating magnetic disk medium, comprising: track following along a first reference track, defined by previously written servo burst patterns, using a servo control loop while writing servo burst patterns at a first target radial location on the magnetic disk medium, the servo control loop having a closed-loop response and including a two-dimensional digital state compensator having first and second inputs and first and second outputs, the first input for receiving position error signals, the first output for generating control signals for positioning a transducer head with respect to the selected track during track following, the second output for generating track-following state variables, and the second input for receiving combined track-following state variables; processing and storing the track-following state variables generated at the second output during the writing of the servo burst patterns at the first target radial location; track following along a second reference track, defined by previously written servo burst patterns, using the servo control loop while writing servo burst patterns at a second target radial location on the magnetic disk medium; processing and storing the track-following state variables generated at the second output during the writing of the servo burst patterns at the second target radial location; track following along a third reference track, defined by the previously written servo burst patterns at the first and second radial target locations, using the servo control loop while writing servo burst patterns at a third target radial location on the magnetic disk medium, wherein the processed and stored track-following state variables generated at the second output during writing of the servo burst patterns at the first and second target radial locations are combined, and the combined track following state variables are applied to the second input during writing of the servo burst patterns at the third target radial location.