Magnetic disk device and method of adjusting preheat time

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United States of America Patent

PATENT NO 12002495
APP PUB NO 20240096349A1
SERIAL NO

18119730

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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According to one embodiment, a magnetic disk device includes magnetic disks, a plurality of magnetic heads, and a control unit. A plurality of magnetic heads each includes a heat-assist unit which applies a preheating current of such magnitude that data already written to the magnetic disk is not erased to a near-field optical element for the preheat time. The control unit measures the time elapsing from a start of write to the time when a value of an index indicating the quality of a recording signal of data written by the magnetic head converges to within a first threshold range, and adjusts the preheat time for each of the magnetic heads in such a manner that the measured lapse time becomes less than or equal to a second threshold.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA TOSHIBA1-1 SHIBAURA 1-CHOME MINATO-KU TOKYO 1050023 JAPAN
TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION1-1 SHIBAURA 1-CHOME MINATO-KU TOKYO 105-0023

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Isokawa, Hiroshi Yokohama Kanagawa, JP 46 158
Matsumoto, Takuya Kawasaki Kanagawa, JP 321 3590

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