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Adaptive Repeatable Runout Cancellation Method and Algorithm for Disk Drives

IP.com Disclosure Number: IPCOM000010278D
Original Publication Date: 2002-Nov-14
Included in the Prior Art Database: 2002-Nov-14

Publishing Venue

IBM

Abstract

A new method is disclosed to calibrate a hard disk drive to cancel repeatable runout (RRO) frequency components. The basic principle is to measure the position error signal (PES) in each servo sampling and the servo control system adaptively learns to cancel selected frequency components of the RRO in the PES.