Identifying a defect in a data-storage medium

摘要

An embodiment of a data-read path includes a defect detector and a data-recovery circuit. The defect detector is operable to identify a defective region of a data-storage medium, and the data-recovery circuit is operable to recover data from the data-storage medium in response to the defect detector. For example, such an embodiment may allow identifying a defective region of a data-storage disk caused, e.g., by a scratch or contamination, and may allow recovering data that was written to the defective region.

主权项

1. A data read path, comprising:
a defect detector configured to identify a defective region of a data storage medium and determine a respective average power level of a plurality of read samples within each of a plurality of overlapping window regions, each window region having a same size and corresponding to a respective data storage location of the data storage medium; and a data recovery circuit configured to recover data from the data storage medium in response to the defect detector.