Patent ID: 8054574
Filing Date: 2011-11-08
Classification: G11B

Abstract:
1. A method of determining correction factors for servo control of a transducer in a disk drive that has a recording medium configured with multiple tracks and a transducer head controlled with a servo control signal, the servo control signal being generated based on an adaptive runout compensation algorithm and correction factors, the method comprising the steps of: (a) successively positioning a transducer head over one or more tracks in a group and, for each track, allowing the adaptive runout compensation algorithm to adapt to a runout of said track for a first number of revolutions of the recording medium; (b) after step (a), stepping the transducer head to be moved over one track and allowing the adaptive runout compensation algorithm to adapt to a runout of said track for a second number of revolutions of the recording medium; and (c) after step (b), determining the correction factors, wherein said step (a) includes: