Magnetic recording medium magnetic head positioning method, and

Details Magnetic recording medium magnetic head positioning method, and Magnetic recording medium magnetic head positioning method, and

1995-08-02

1999-05-18

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 48, G11B5/596

Patent

active

059056037

ABSTRACT:
A method and apparatus for accurately positioning the magnetic head of disk drives is disclosed. A recording medium is provided having two radial data structures formed thereon. Each radial data structure includes two parallel and adjacent data burst pattern trains. The first burst pattern is defined by a first side centrally aligned with a concentric data track and a second side opposed to the first side and centrally aligned with an adjacent concentric data track. The third burst pattern is defined by a third side spaced apart from the first side of the first burst pattern by a distance not greater than the read width of a magnetic head and a fourth side opposed to the third side and spaced apart from the second side by a distance not greater than the read width. The first radial data structure generates a first signal for positioning the magnetic head relative to the recording medium. The second radial data structure, parallel and offset from the first data structure, generates a second head position signal. Thus, the second head position signal is detected before the first head position signal becomes undetectable.

REFERENCES:
patent: 4783705 (1988-11-01), Moon et al.
patent: 5164866 (1992-11-01), Sano
patent: 5353170 (1994-10-01), Tung
patent: 5523902 (1996-06-01), Pederson

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