Head positioning control system for use in a disk storage system

Details Head positioning control system for use in a disk storage system Head positioning control system for use in a disk storage system

1996-12-06

1998-09-01

Edun, Muhammad N.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7804, 360 7711, G11B 5596

Patent

active

058018972

ABSTRACT:
In a disk drive, the CPU uses the cylinder code recorded on the servo area on the disk and thereby senses the present position of the read head. The cylinder codes are the addresses of the tracks formed on the disk and indicate the track position of the read head. In the servo area, the redundant data for identifying the boundary between adjacent tracks is recorded in addition to the cylinder code. When the read head is located near the track boundary, the CPU receives the cylinder code and redundant data and thereby determines which one of the boundaries with adjacent tracks to the track identified by the cylinder code the read head is located nearby. This makes it possible to determine the present position of the read head even when the read head accurately is positioned near the boundary between adjacent tracks.

REFERENCES:
patent: 5596460 (1997-01-01), Greenberg et al.
patent: 5610808 (1997-03-01), Squires et al.
patent: 5617536 (1997-04-01), Freitas et al.

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