Variable stopwrite threshold using kurtosis
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United States of America Patent
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May 26, 2015
Grant Date -
Oct 2, 2014
app pub date -
Jun 17, 2014
filing date -
Aug 28, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A method according to one embodiment includes measuring a current position error signal, and calculating a statistical derivative using the current position error signal sample. A kurtosis value is calculated using a current position error signal sample or derivative thereof. A threshold value is adjusted using the kurtosis value. The statistical derivative is compared to the threshold value, and writing is enabled when the statistical derivative does not exceed the threshold value. A determination is made whether to enable or disable writing based on a stopwrite threshold when the statistical derivative exceeds the threshold value.
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