Track identification and counting in a disk drive positioning sy

Details Track identification and counting in a disk drive positioning sy Track identification and counting in a disk drive positioning sy

1990-03-30

1992-08-04

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7705, G11B 555

Patent

active

051364409

ABSTRACT:
A disk drive wherein the radial position and velocity of a sensing head being positioned by a servo system is estimated from 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 acording 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 as a Gray code representation of the track type over which the sensor is positioned, wherein the first bit of the Gray code depends on whether the sum of the sensed amplitudes of a first pair of servo signals is greater or less than the sum of the sensed amplitudes of a second pair of servo signals and the second bit of the Gray code depends on whether the sum of the sensed amplitudes of a third pair of servo signals is greater or less than the sum of the sensed amplitudes of a fourth pair of servo signals.

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. 1976, 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. 2, Jul. 1978, pp. 804-805, Herrington et al., "Quad-Burst PES System for Disk File Servo".

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