Apparatus and method for compensating for environmental effects on media

摘要

An apparatus and method for compensating for environmental effects on media. The apparatus includes an array of servo readers that are positioned at a non-zero azimuth angle relative to a medium. The position of the array of servo readers is dynamically updateable in both a vertical direction and an azimuth angle direction based on a combination of an average position error signal of both an upper portion of the servo readers and a lower portion of the servo readers. Based on the average position error signal and a reference signal, a controller generates control signals that are output to one or more actuators. The actuators then adjust the position of the array of servo readers based on the control signals received.