Data recording apparatus able to accurately access a floppy disk

Details Data recording apparatus able to accurately access a floppy disk Data recording apparatus able to accurately access a floppy disk

1988-02-08

1990-02-13

Canney, Vincent

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 48, G11B 503, G11B 509

Patent

active

049011693

ABSTRACT:
A floppy disk drive apparatus capable of using high- and low-density disks includes an erase section. When it is determined that a floppy disk to be used has a high-density, data is immediately written on the floppy disk in response to a write command. However, when it is determined that the floppy disk to be used has a low-density, data, which has previously been recorded on the recording area of the track where the read/write head is currently located, is erased prior to the writing of new data. After erasure is completed, the new data is recorded on the recording area, in response to a write signal.

REFERENCES:
patent: 3900894 (1975-08-01), Aziz
patent: 4298897 (1981-11-01), Arter et al.
patent: 4414589 (1983-11-01), Oliver et al.
patent: 4455582 (1984-06-01), Yanagida et al.
patent: 4622601 (1986-11-01), Isozaki et al.
patent: 4644418 (1987-02-01), Banno et al.
patent: 4754344 (1988-06-01), Shoji et al.

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