Patent ID: 7792011

Claim:
A storage device, comprising: a storage medium for storing data in the form of marks; an array of probes designed for scanning said storage medium for mark detecting purposes in a scanning mode; wherein said storage medium has fields with each field adapted to be scanned by an association probe, each of said fields has a plurality of tracks and each of said tracks has a track centerline for the associated probe to follow in said scanning mode; wherein at least one of said fields comprises marks representing operational data for operating said scanning mode wherein at least one operational data field comprises tracking marks for determining the deviation of the associated probe form a current track centerline, at least some of said tracking marks arranged off-centered from said track centerline in a cross-track direction and at least one operational data field comprises first and second bursts where a tracking mark is associated to a burst when holding a predetermined distance between its mark center and a track centerline or between its mark center and a center of a mark of a different burst; and the at least one operational data field having a third and a fourth burst, where a mark center cross-track distance between marks of the first and the third bursts as well as a mark center cross-track distance between marks of the second and the fourth bursts is one quarter of a track pitch.