Data storage device calibrating a laser power for heat assisted magnetic recording based on slope of quality metric

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United States of America Patent

PATENT NO 9384774
SERIAL NO

14666080

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Abstract

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A data storage device is disclosed comprising a disk and a head actuated over the disk, wherein the head comprises a laser configured to heat the disk while writing data to the disk. The laser power is adjusted and a pattern is written to a target track at the adjusted laser power. The pattern is read from the target track to generate a read signal, and a quality metric is generated based on the read signal. The process is repeated at least once, and a write power for the laser is configured based on a slope of the quality metric.

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Patent Owner(s)

  • WESTERN DIGITAL TECHNOLOGIES, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Haralson, Phillip Scott Huntington Beach, US 3 15
Nookala, Poornima Irvine, US 3 59

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