Patent ID: 6760183
Filing Date: 2004-07-06
Classification: G11B

Abstract:
A disk drive comprising:a disk including a track containing a servo area on which servo data is prerecorded; a head configured to read/write data from/to said disk; an actuator mounted with said head and configured to locate said head in a target position on said disk; a servo controller configured to perform a servo control operation for driving said actuator and locating said head in the target position on said disk; a memory configured to store an initial learning value for determining a servo compensation value required when the servo control operation is performed; and a learning controller configured to determine whether the initial learning value is valid and inhibit a learning operation from being performed when the initial learning value is valid as a determination result, the learning controller causing said servo controller to perform a servo control operation when the disk drive starts, and determining that the initial learning value is valid when a tracking operation succeeds by servo compensation using the initial learning value.