Method for controlling a head during a starting operation of a d

Details Method for controlling a head during a starting operation of a d Method for controlling a head during a starting operation of a d

1994-05-10

1996-04-09

Epps, Georgia Y.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 32, G11B 724

Patent

active

055068316

ABSTRACT:
Elimination of mis-detection of a front erasure section of reference information for controlling the position of a read/write head on the disk storage device is accomplished, by zoning a part of a disk surface for a specific zone RZ separately from a data storage zone DZ, storing a dummy data Dd in a code pattern with a predetermined repetition cycle in an entire area, excluding areas for reference information storage, of the specific zone RZ, and positioning a read/write head in the specific zone RZ to detect a front erasure section ER of the reference information RI by a reference information read out means 30. The read out means 30 reads out of an identification section ID and a servo information section SI of the reference information RI securely without being confused by fake erasure sections.

REFERENCES:
patent: 4823212 (1989-04-01), Knowles et al.
patent: 5079654 (1992-01-01), Uno et al.
patent: 5371724 (1994-12-01), Uno
patent: 5379166 (1995-01-01), Tsukada et al.

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