Patent ID: 7612961

Claim:
A magnetic recording disk comprising: a recording layer of magnetizable material for the recording of data in a plurality of generally concentric circular data tracks, each track having a track centerline; and a plurality of nondata servo sectors extending generally radially across a plurality of the data tracks, the servo sectors comprising at least two fields of generally radially directed magnetized stripes separated by nonmagnetic spaces, each stripe comprising a plurality of discrete radially-spaced generally parallelogram-shaped islands, each island having its length oriented at an acute angle relative to a track centerline, wherein the islands in one of said at least two fields are shifted radially relative to the islands in another of said at least two fields and wherein a plurality of alternate stripes in each field in the along-the-track direction have a magnetization in a first direction and the stripes between said alternate stripes in each field have a magnetization in a second direction substantially antiparallel to said first direction.