Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1991-03-01
1992-10-06
Smith, Jerry
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7702, 360 7804, G11B 5596, G11B 555
Patent
active
051537869
ABSTRACT:
A magnetic disk drive wherein the radial position of a sensing head being positioned by a servo system is ascertained by the sensing of servo signals arranged in successive groups of tracks on a disk surface, each of the tracks in a group being of a different track type and said servo signals being in relative circumferential positions according to the track types of the tracks containing those signals. The sensed servo signals are linearly related to the radial position of the head relative to the track containing the corresponding servo signal, the linear relationship extending over a radial distance of a plurality of tracks. The position is ascertained alternately from differences in the amplitudes of pairs of sensed servo signals associated with the destination track and differences in the amplitudes of pairs of sensed servo signals associated with the track traversed immediately prior to the destination track.
REFERENCES:
patent: 3534344 (1970-10-01), Santana
patent: 3691543 (1972-09-01), Mueller
patent: 3818502 (1974-06-01), Chien et al.
patent: 3893180 (1975-07-01), Braun et al.
patent: 3994016 (1976-11-01), Moghadam
patent: 4027338 (1977-05-01), Kril
patent: 4048660 (1977-09-01), Dennison et al.
patent: 4052741 (1977-10-01), Baca et al.
patent: 4072990 (1978-02-01), Case et al.
patent: 4101942 (1978-07-01), Jacques
patent: 4115823 (1978-09-01), Commander et al.
patent: 4149200 (1979-04-01), Card
patent: 4172267 (1979-10-01), Sidman
patent: 4238809 (1980-12-01), Fujiki et al.
patent: 4297737 (1981-10-01), Andresen et al.
patent: 4326226 (1982-04-01), Touchton et al.
patent: 4377827 (1983-03-01), Rose
patent: 4424543 (1984-01-01), Lewis et al.
IBM Tech. Disc. Bull., vol. 18, No. 10, Mar. 1976, pp. 3424-3425 Oswald, "Track Following Servo System".
IBM Tech. Disc. Bull., vol. 19, No. 7, Dec., 1876, pp. 2686-2687, Brownback et al., "Measuring and Adjusting Speed of Magnetic Disk Access Arm".
IBM Tech. Disc. Bull., vol. 20, No. 8, Jan. 1978, pp. 3243-3247 Deremer et al., "Sector Servo Method".
IBM Tech. Disc. Bull., vol. 21, No. 22, Jul. 1978, pp. 804-805 Herrington et al., "Quad-Burst PES System for Disk File Servo".
Digital Equipment Corporation
Garland Steven R.
Smith Jerry
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