Importance

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Abstract

This invention discloses a plurality of substantially parallel data arcs disposed on a flat data storage medium. The data arcs include at least two linearly aligned servo-data fields disposed in an inner data arc and an outer data arc with an inter-arc distance. The servo data field disposed on the outer data arc is disposed with an offset from an identical radial-angle position projected from a radial center to the servo data field of the inner data arc. The offset is substantially proportional to the inter-arc distance and substantially proportional to SIN (.theta.) where .theta. is an angle between the identical radial-angle position and a linear-alignment direction between the two linearly aligned servo-data fields. Furthermore, the servo-data field on the outer data arc is disposed at a location with the offset from the identical radial-angle position in a direction toward a smaller radial angle projected from the radial center to the servo data field of the inner data arc.

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First Claim