Data storage device executing retry operation by buffering signal samples at different radial offsets
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United States of America Patent
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Apr 19, 2016
Grant Date -
N/A
app pub date -
Jul 14, 2015
filing date -
Mar 13, 2015
priority date (Note) -
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Abstract
A data storage device is disclosed comprising a head actuated over a disk. The head is positioned at a first radial location over the disk and at least part of a codeword on the disk is read to generate first signal samples. A first quality metric is generated for the first signal samples. The head is positioned at a second radial location over the disk different from the first radial location and at least part of the codeword is read to generate second signal samples. A second quality metric is generated for the second signal samples. A first subset of the first signal samples is combined with a second subset of the second signal samples based on the first and second quality metrics to generate a combined set of signal samples. An attempt is made to decode the codeword based on the combined set of signal samples.
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