CPC G11B 5/59688 (2013.01) [G11B 5/012 (2013.01); G11B 5/59627 (2013.01)] | 22 Claims |
1. A data storage device comprising:
a disk comprising a plurality of data tracks, including a data track N and a data track N−1;
a head actuated over the disk; and
one or more processing devices configured to:
measure one or more signal to noise ratio (SNR) metrics for corresponding sectors of at least one of the data track N and the data track N−1, wherein the measuring is based at least in part on reading one or more of the data track N and the data track N−1 using one or more read offsets;
estimate a position of at least one of the data track N and the data track N−1, wherein estimating the position is based at least in part on measuring the one or more SNR metrics; and
reconstruct:
one or more risk values for at least a portion of the data track N−1, based on the one or more SNR metrics for the data track N−1, and wherein the one or more risk values correspond to a write abort threshold to abort writing data to the data track N, and
a position error signal (PES) for at least one of the data track N−1 and the data track N based on the corresponding estimated positions.
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