Method and apparatus for writing magnetic head positioning signa

Details Method and apparatus for writing magnetic head positioning signa Method and apparatus for writing magnetic head positioning signa

1992-03-11

1994-06-28

Casaregola, Louis J.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7711, G11B 5596

Patent

active

053252454

ABSTRACT:
In a magnetic disk apparatus, a head positioning signal is written on a magnetic disk, the written positioning signal is read out, the read positioning signal is demodulated to produce a position signal, and a data write/read head is positioned to a predetermined track in responses to the produced position signal. A head positioning signal is written into write tracks adjacent to each other along a radial direction of the magnetic head, the positioning signal is read out by tracing a read track bridging the write tracks, and a positioning error of the head positioning signal is generated from a shift of the read positioning signal with respect to the read track. Furthermore, the position signal is over-written by actuating the write head in the radial direction according to the positioning error.

REFERENCES:
patent: 4371902 (1983-02-01), Baxter et al.
patent: 4371960 (1983-02-01), Kroiss
patent: 4531167 (1985-07-01), Berger
patent: 4982295 (1991-01-01), Yakuwa et al.

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