Magnetic disk drive with structure for avoiding DC magnetic...

Details Magnetic disk drive with structure for avoiding DC magnetic... Magnetic disk drive with structure for avoiding DC magnetic...

2006-02-14

2006-02-14

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

C360S066000

Reexamination Certificate

active

06999257

ABSTRACT:
A disk drive of a perpendicular magnetic recording type uses a double-layered disk. The disk has a plurality of tracks for storing data and a non-recording region (GB area) between tracks. Not a DC magnetized pattern but an AC magnetized pattern or a random magnetized pattern is recorded in the GB area. With this structure, it is possible to prevent an influence of magnetic disturbance due to a DC magnetic field on the surface of the disk.

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