Recovering user data from a variably encroached data track
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United States of America Patent
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Jan 23, 2018
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app pub date -
Oct 24, 2016
filing date -
Oct 24, 2016
priority date (Note) -
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Abstract
Method and apparatus for recovering user data from a rotatable data recording medium. In some embodiments, a moveable read element detects at least one uncorrectable read error in user data stored in a data sector arranged along a concentric track. A read retry operation is carried out to recover the user data by radially advancing the moveable read element from a first offset value to a different second offset value with respect to the track in accordance with a trajectory profile while transducing the user data from the data sector. This allows data that are variably overwritten (encroached upon) by different radial amounts from an adjacent track to be recovered.
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