Data storage system with a dual-gap head using a dual-mode flexi

Details Data storage system with a dual-gap head using a dual-mode flexi Data storage system with a dual-gap head using a dual-mode flexi

1993-11-12

1995-05-02

Psitos, Aristoteli

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

360 63, 360 75, 360113, 360121, G11B 1512

Patent

active

054125162

ABSTRACT:
A data storage system such as a tape drive or flexible disk drive having a dual-gap head being controlled by a dual-mode flexible disk controller. The flexible disk controller has a first mode designed to use a head having one section for perpendicular reading and writing and a second section for erasing. The flexible disk controller has a second mode designed to use a conventional flexible disk head having a single gap for reading, writing and erasing. The data storage system has a head which has one relatively long gap optimized for overwrite/erase capability and a separate shorter read-only gap optimized for reading high bit densities. The data storage system uses the flexible disk controller in its first mode for formatting and writing and in its second mode for reading. When the controller is being used in a perpendicular recording mode, the head design with the write section offset from the erase section requires extended formatted sector fields. The data storage system takes advantage of these extended formatted data sector fields to accommodate a dual-gap head with an offset between the read gap and the write gap.

REFERENCES:
patent: 4703355 (1987-10-01), Cooper et al.
patent: 4779149 (1988-10-01), Watanabe
patent: 4803571 (1989-02-01), Fujioka et al.
patent: 4809090 (1989-02-01), Suzuki
patent: 4914534 (1990-04-01), Chito
patent: 5218497 (1993-06-01), Tanabe et al.
patent: 5289328 (1994-02-01), Saliba
QIC Development Standard QIC-3010-MC Rev. A, Jun. 1993, p. 13.

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