Disk drive using magnetic disk medium of discrete track...

Details Disk drive using magnetic disk medium of discrete track... Disk drive using magnetic disk medium of discrete track...

2007-08-28

2007-08-28

Tzeng, Fred F. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078040, C360S048000

Reexamination Certificate

active

11147463

ABSTRACT:
A magnetic disk medium of a discrete track recording (DTR) structure and a disk drive using the magnetic disk medium are disclosed. The magnetic disk medium of the DTR structure has positional-error detection servo patterns in a servo region, the positional-error detection servo patterns being formed of null servo patterns. This enables magnetic regions included in the servo region to occupy substantially 50% of the area of the servo region.

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