Magnetic recording and reproducing apparatus and magnetic...

Details Magnetic recording and reproducing apparatus and magnetic... Magnetic recording and reproducing apparatus and magnetic...

2007-01-02

2007-01-02

Tzeng, Fred F. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

11111943

ABSTRACT:
The burst pattern shape in a discrete medium is set to a shape (truncated quadrangular pyramid shape) having substantially trapezoidal shapes in a track width direction and in a track circumferential direction, respectively, and a predetermined relationship is satisfied among W1,W2,Tp, and Wr where W1represents an upper side corresponding to the surface of a convex magnetic recording layer and W2a lower side corresponding to the lower surface of the convex magnetic recording layer in the trapezoidal shape in the track width direction, Tp represents a data track pitch of a data information recording portion, and Wr represents a read width of a magnetic head. Therefore, the burst pattern shape makes it possible to largely reduce a production load in processing and still to obtain an accurate position error signal.

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U. S. Appl. No. 11/333,505, filed Jan. 18, 2006, Tagami et al.

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