Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1996-04-17
1998-05-19
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 75, 360 53, G11B 1546
Patent
active
057543550
ABSTRACT:
A disk drive apparatus and read error recovery method in a disk drive apparatus removes thermal asperities on disk surfaces. A projection, such as a thermal asperity, on the recording surfaces of disks is detected when a signal transducer head contacts the projection. The flying height of the signal transducer head is lowered, e.g., by changing the disk rotation speed from the normal rotation speed in read/write operations or by heating a suspension having a bimetal element, while the signal transducer head is positioned over the detected projection on the track. The signal transducer head strikes the projection to break the projection. This avoids a subsequent error from being caused by the thermal asperity.
REFERENCES:
patent: 4635139 (1987-01-01), Nguyen et al.
patent: 4669011 (1987-05-01), Lemke
patent: 5233482 (1993-08-01), Galbraith et al.
patent: 5461521 (1995-10-01), Ito et al.
patent: 5527110 (1996-06-01), Abraham et al.
patent: 5537034 (1996-07-01), Lewis
patent: 5612830 (1997-03-01), Gregory et al.
Patent Abstracts of Japan, vol. 17, No. 311, P-1556, Jun. 14, 1993.
IBM Technical Disclosure Bulletin, vol. 34, No. 11, Apr. 1992, pp. 217-219, Fast Offset Recovery for Thermal Asperity Data Recovery Procedure.
Harako Fujio
Nakajima Michio
Nakamura Takashi
Ogasawara Kenji
Suda Katsumi
Bussan Matthew J.
International Business Machines - Corporation
Sniezek Andrew L.
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