Dual head servo system and method for a magnetic disk

Details Dual head servo system and method for a magnetic disk Dual head servo system and method for a magnetic disk

1987-02-24

1989-05-23

Faber, Alan

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7708, G11B 5596

Patent

active

048335517

ABSTRACT:
A servo system for a removable disk having twice the servo information per disk track. The disk is encoded such that the servo sectors on one surface of the disk are angularly off-set and are located half-way between the servo sectors on the other side of the disk. Once a desired track is located, the disk rotates and the system switches between heads on the two surfaces of the disk to alternately read the servo sectors on both sides of the disk. A demodulator, peak detector, sample/hold device stores the servo information from the previous two servo sectors which were read to produce a position error signal which controls the linear motor to keep the heads on the desired track.

REFERENCES:
patent: 4380034 (1983-04-01), Krake
patent: 4424543 (1984-01-01), Lewis et al.
patent: 4638384 (1987-01-01), Stewart et al.

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