Patent ID: 8023221

Claim:
A system comprising: a signal generating module configured to generate position error signals based on servo bursts read from a servo region of a track of a disk drive, wherein the servo burst are read by a head of the disk drive, and wherein the servo bursts include a first servo burst, a second servo burst, a third servo burst, and a fourth servo burst; and a position control module configured to generate differences between the position error signals, and determine a position of the head relative to the track based on (i) a first difference of the differences and (ii) a second difference of the differences, wherein the first difference is based on the first servo burst and the second servo burst, wherein the second difference is based on (i) the third servo burst and (ii) the first servo burst or the second servo burst, and is independent of the fourth servo burst, and wherein the third servo burst is offset by a predetermined distance from the first servo burst or the second servo burst.