Patent ID: 8199423
Filing Date: 2012-06-12
Classification: G11B

Abstract:
1. An information storage apparatus comprising: a storage medium configured to store a first servo pattern comprising absolute position information and a second servo pattern comprising relative position information; a head configured to record on the storage medium and to reproduce information from the storage medium; a track pitch correction module configured to move the head at an initial feed track pitch using the second servo pattern, by a target distance in a radius direction on the storage medium associated with the first servo pattern, and to correct the initial feed track pitch based on an actual distance of the head movement and the target distance; a head position controller configured to position the head based on the initial feed track pitch corrected by the pitch correction module and information of the first and the second servo patterns; and a recording signal generator configured to generate a control signal which causes the head to record a third servo pattern comprising the absolute position information while the head position controller is positioning the head.