Patent ID: 8116026

Claim:
A track follow controller, comprising: a burst selector configured to select at least one burst pair based on burst pair selection data; and a linear position calculator configured to i) perform a first calculation of a position of a head, wherein the first calculation corresponds to a calculation using a first burst pair, ii) perform a second calculation of a position of a head, wherein the second calculation corresponds to a calculation using a second burst pair, iii) in response to an output of the first burst pair becoming nonlinear, switch between calculating using the first burst pair, the second burst pair, and a third burst pair, wherein the second burst pair is selected in response to the first burst pair becoming nonlinear in a positive direction, and the third burst pair is selected in response to the first burst pair becoming nonlinear in a negative direction, and iv) calculate a linear position of the head based on i) the first calculation and the second calculation.