Patent ID: 6975471
Filing Date: 2005-12-13
Classification: G11B

Abstract:
1. A recording medium having a plurality of adjacent data tracks, each track having servo sectors, the servo sectors in each track being aligned along the track with servo sectors in adjacent tracks; wherein the servo sectors in the tracks form a servo pattern comprising: a first pseudo-random binary sequence (PRBS) of servo position information; a second PRBS of servo position information, the second PRBS being identical to the first PRBS but shifted by a portion of the period of the first PRBS, the first PRBS and second PRBS each being located between the track boundaries in alternating tracks in a first region and between the track centers in alternating tracks in a second region spaced along the track from said first region; and two track identification (TID) fields for each track, one of the TID fields for each track being located between the first and second regions.