Patent ID: 7106542
Filing Date: 2006-09-12
Classification: G11B

Abstract:
1. A method comprising the steps of: providing a disk surface having servo information written thereon, wherein the servo information is grouped into 1x servo sectors and 2x servo sectors and wherein the 1x servo sectors and the 2x servo sectors form a plurality of tracks; providing a read head and a write head associated with the disk surface; servoing on the 1x servo sectors associated with a track; determining position error signals due to repeatable runout for the 1x servo sectors, while servoing on the 1x servo sectors associated with the track; determining information related to position error signals due to repeatable runout for the 2x servo sectors, while servoing on the 1x servo sectors associated with the track; and, calculating embedded runout correction values for the 2x servo sectors associated with the track using the information related to the position error signals due to repeatable runout for the 2x servo sectors, wherein the embedded runout correction values for the 2x servo sectors associated with the track are given by the following formula: where erc