Disk drive of a sector servo system for positioning and controll

Details Disk drive of a sector servo system for positioning and controll Disk drive of a sector servo system for positioning and controll

1996-03-15

1999-02-02

Young, W. R.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7708, G11B 2110

Patent

active

058673377

ABSTRACT:
In a self-servo writing mode, parameters such as a moving amount of a head, a time delay and the like are measured and detected by using preservo information recorded beforehand on, for instance, an outermost periphery of a disk. In accordance with the detected parameters, the head is positioned in a predetermined radial position on the disk and virtual servo information and servo information are written. Then, in accordance with at least either the virtual servo information or the servo information, the head is positioned in a next predetermined radial position and the virtual servo information and the servo information are written. After writing on a full surface of the disk is completed, a normal mode is switched ON and writing/reading of data via the head can be performed.

REFERENCES:
patent: 4414589 (1983-11-01), Oliver et al.
patent: 5272578 (1993-12-01), Diau
patent: 5448429 (1995-09-01), Cribbs et al.
patent: 5541784 (1996-07-01), Cribbs et al.
patent: 5570247 (1996-10-01), Brown et al.
patent: 5612833 (1997-03-01), Yarmchuk et al.
patent: 5615058 (1997-03-01), Chainer et al.
Shimomura, "Magnetic Disk Device", Patent Abstracts of Japan, publication No. 07-78434, Mar. 20, 1995.

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