System having optical disk and disk drive unit

Details System having optical disk and disk drive unit System having optical disk and disk drive unit

1989-06-26

1992-03-03

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

3692753, 369 48, G11B 1552

Patent

active

050938193

ABSTRACT:
Disclosed is an optical disk having a plurality of helical or concentric tracks to perform read/write access in units of sectors constituting each track, each of the plurality of tracks, having one or more track address areas for track seek, the remainder of the track being free format. The track address area is written with a track address signal formed in a predetermined format. The free format area is not divided into sectors but is instead formed to allow writing of data in a desired format.

REFERENCES:
patent: 4932014 (1990-06-01), Tamiya
patent: 4967403 (1990-10-01), Ogawa et al.

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