Servo pattern writing method for magnetic disk drives, and magne

Details Servo pattern writing method for magnetic disk drives, and magne Servo pattern writing method for magnetic disk drives, and magne

1997-04-28

2000-05-16

Tran, Thang V.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7708, G11B 5596

Patent

active

060645415

ABSTRACT:
Disclosed are a servo pattern writing method for magnetic disk drives making it possible to write a high-density and easily controllable servo pattern with high producibility, and a magnetic disk drive in which a servo pattern is written according to the method. The servo pattern writing method for magnetic disk drives in which a servo pattern is written on a plurality of surfaces in a magnetic disk drive having the plurality of surfaces comprises a step of writing a master servo pattern on a master surface that is one of the plurality of surfaces, and a step of writing a servo pattern on the surfaces other than the master surface while performing positioning on the basis of the master servo pattern. The master servo pattern contains a pattern identical to the servo pattern to be written on the surfaces other than the master surface. The master servo pattern is written before the master surface is incorporated in a main unit of the magnetic disk drive. Part of the master servo pattern other than the pattern identical to the servo pattern is deleted after the servo pattern is written on the surfaces other than the master surface.

REFERENCES:
patent: 4669004 (1987-05-01), Moon et al.
patent: 5485322 (1996-01-01), Chainer et al.
patent: 5570247 (1996-10-01), Brown et al.
patent: 5606469 (1997-02-01), Kosugi et al.

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