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Data storage system, method and computer program for adjusting write stop threshold based in part on variable smoothing coefficient
Data storage system, method and computer program for adjusting write stop threshold based in part on variable smoothing coefficient
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机译:部分基于可变平滑系数来调整写停止阈值的数据存储系统,方法和计算机程序
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摘要
In one embodiment, a data storage system includes a head; a drive mechanism for passing a medium over the head; a controller electrically coupled to the head; logic encoded in or available to the controller for: periodically determining a stopwrite threshold based on a standard deviation or a variance at a current position error signal sample, wherein a smoothing factor applied to a subsequent calculation of the standard deviation or variance is altered based at least in part on a current magnitude of the standard deviation or the variance; determining whether the current position error signal sample exceeds the stopwrite threshold; disabling writing when the current position error signal sample exceeds the stopwrite threshold; and enabling writing when the current position error signal sample does not exceed the stopwrite threshold. Other systems, methods, and computer program products are described according to more embodiments.
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