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AssigneeWestern Digital Technologies, Inc.
InventorMichael S. Rothberg
Estimating the term…
A disk drive is disclosed comprising a head actuated over a disk. A redundancy generator generates a plurality of redundancy symbols appended to user data to form a codeword C(x) written to a selected data sector on the disk. During a read operation, a syndrome generator generates a plurality of error syndromes in response to a received codeword C′(x) generated by reading the selected data sector. An error detector, responsive to the error syndromes, detects a number of errors in the received codeword C′(x), and a plurality of counters count a number of times the number of errors falls within a predetermined plurality of ranges to thereby provide a distribution of the errors. The error distribution is used, for example, for selecting a track density or ECC depth, or for failure prediction or defect mapping.
A disk drive comprising:
An integrated circuit for use in a disk drive, the disk drive comprising a head actuated over a disk, wherein the disk comprising a plurality of data tracks each comprising a plurality of data sectors, the integrated circuit comprising:
A method of operating a disk drive, the disk drive comprising head actuated over a disk, wherein the disk comprising a plurality of data tracks each comprising a plurality of data sectors, the method comprising the steps of:
Dependencies are inferred from the claim text.