Method and apparatus for detecting defects on a disk in a hard d

Details Method and apparatus for detecting defects on a disk in a hard d Method and apparatus for detecting defects on a disk in a hard d

1998-04-15

2000-11-21

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360 25, 360 48, G11B 509, G11B 502

Patent

active

061511803

ABSTRACT:
A method and apparatus for determining a number of defects detected on a disk in a hard disk drive. The hard disk drive comprises an actuator arm mounted to a housing and a head mounted to the actuator arm. A spin motor is mounted to the housing and a disk is attached to the spin motor. The disk has a plurality of tracks, each of which has a plurality of sectors. Each of the sectors has a data field. The hard disk drive further comprises a defect detection circuit coupled to the head that detects a number of defects located in the data field. In one embodiment, the hard disk drive comprises a defect size detection circuit coupled to the head, that detects a corresponding size of each defect detected.

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patent: 5610776 (1997-03-01), Oh
patent: 5754353 (1998-05-01), Behrens et al.
patent: 5822139 (1998-10-01), Ayabe
patent: 5844911 (1998-12-01), Schadegg et al.

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