Magnetic disk apparatus

Details Magnetic disk apparatus Magnetic disk apparatus

1997-11-24

1999-09-14

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7707, 360 7804, G11B 5596

Patent

active

059531789

ABSTRACT:
A magnetic disk apparatus includes a dual head equipped with an MR head for reading data and an inductive head for writing the data. One ID portion and one servo pattern are disposed in one sector and an unequal track pitch is formed. The ID portion is formed at the center of a radius of two positions to which the MR head is positioned at the time of reading the data and writing the data, respectively.

REFERENCES:
patent: 5587850 (1996-12-01), Ton-that
"Use of Variable Track Pitch Allowed By Performance Variation", IBM Technical Disclosure Bulletin, vol. 33, No. 12, May 1991, p. 131.
Patent Abstract of Japan, 06314479, Nov. 8, 1994, Shinichi Magnetic Disk Device.
Patent Abstract of Japan, vol. 12 No. 388, Jun. 1, 1988, Tadashi Magnetic Disk Reproducing Device.
Patent Abstract of Japan vol. 15 No. 471 Sep. 4, 1991, Takashi et al. Servo Signal Writing-in Method & Servo Disk Medium in Magnetic Disk Device.
Patent Abstract of Japan vol. 14 No. 332, Apr. 24, 1990, Tomio Recording Method.
Patent Abstract of Japan vol. 14 No. 301, Apr. 4, 1990, Hiroshi et al. Mohitract Magnetic Head and Method for Controlling Tracking by Such Head.

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