Disk drive having a disk of discrete-track media type

Details Disk drive having a disk of discrete-track media type Disk drive having a disk of discrete-track media type

2011-04-26

2011-04-26

Negrón, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

C360S077080, C360S078140

Reexamination Certificate

active

07933088

ABSTRACT:
According to one embodiment, a disk drive has a DTM type disk. The DTM type disk has a servo area on one recording surface. In the servo area, a servo pattern is recorded. The servo pattern is composed of a projection-depression pattern and an N- and P-pole magnetic pattern. The N- and P-pole magnetic pattern is recorded in an address-data region that contains a cylinder code.

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Office Action for Japanese Patent Application No. 2007-338217, mailed Mar. 3, 2009.

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