Method of accessing data recorded on a disk at a high speed

Details Method of accessing data recorded on a disk at a high speed Method of accessing data recorded on a disk at a high speed

1987-06-05

1989-02-28

Salce, Patrick R.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

358907, 360 7807, 369 32, G11B 2700

Patent

active

048090948

ABSTRACT:
Disclosed is a method of accessing data recorded in concentric circular or spiral tracks on a recording disc at high speed. A pickup at a position S on the disc is kicked to a position S' on a track on which an objective address data recorded position O exists. Thereafter, the disc is accelerated at a predetermined acceleration torque until the pickup reaches an intermediate position between the positions S' and O, which is determined by a rotational angle from the position S' to O. Then, the disc is decelerated at a predetermined deceleration torque so as to return a speed at which the pickup can read the recorded data before the pickup reaches the position O. With the acceleration and deceleration of the disc, the pickup can quickly become close to the position O and thus can access the data recorded at the position O within an extremely short time.

REFERENCES:
patent: 4321635 (1982-03-01), Tsuyuguchi
patent: 4414584 (1983-11-01), Kurata
patent: 4425587 (1984-01-01), Kurata
patent: 4530018 (1985-07-01), Hoshino et al.

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