Magnetic recording device and reading method
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United States of America Patent
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Jul 18, 2017
Grant Date -
Jul 13, 2017
app pub date -
Mar 31, 2016
filing date -
Jan 8, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
According to one embodiment, a magnetic disk device includes a disk including a tracks including a servo region, a light irradiator configured to irradiate the disk with light and heat the disk with the light, a head including a write head configured to write data in a range irradiated and heated with the light, and a read head configured to read data from the tracks, a controller configured to write first data to be used for offset detection in a first region of the tracks, read the first data from the first region with reference to servo data in the servo region, detect an offset of the read head based on an amplitude of a first signal of the first data, and control a position of the read head based on the offset.
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