| 摘要 |
<p>A head position control device controls the position of a head with respect to a disk where a post code 25 is assigned to a servo frame 16. Servo frames of a disk is constituted by a servo frame not having a post code recorded in an inner side zone 4-2 and a servo frame having a post code recorded in an outer side zone 4-1. The device reads the servo frame, demodulates a current position from the servo frame, drives an actuator 3 according to the modulated position, and controls the position of the head to a target position. While implementing a high TPI, the inspection time for post codes can be decreased with a servo frame occupying ratio in consideration of the data format.</p> |
