Di-bit recording technique and associated servo indicia

Details Di-bit recording technique and associated servo indicia Di-bit recording technique and associated servo indicia

1980-04-14

1982-02-02

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 21, G11B 556, G11B 2110

Patent

active

043142907

ABSTRACT:
Disclosed are techniques for recording digital data marks in a "herringbone" pattern along co-aligned data tracks--preferably with a di-gap transducer--wherein head registration is guided by "LAMBDA" ("V-shaped" or "A shaped") servo marks impressed along data tracks and readily detected (e.g., by a di-gap transducer).

REFERENCES:
patent: 2929670 (1960-03-01), Garrity
patent: 2938962 (1960-05-01), Konins et al.
patent: 3185972 (1965-05-01), Sippel
patent: 3665118 (1972-05-01), Cooper, Jr.
patent: 3678220 (1972-07-01), Luhrs
patent: 3686649 (1972-08-01), Behr
patent: 4007493 (1977-02-01), Behr et al.
patent: 4074328 (1978-02-01), Hardwick
patent: 4166282 (1979-08-01), Ragle et al.
IBM/TDB vol. 4, No. 5, Oct. 1961, pp. 24-25, "Transducer Position Sensor" by Tsilibes.
IBM/TDB vol. 5, No 1, Jun. 1962 p. 33, "Magnetic Head Positioning" by Buslik.
IBM/TDB vol. 17, No. 4, Sep. 1974, p. 1168, "Phase Sensing Magnetic Recording Head" by Jansen.

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