Disk drive biasing sync pattern of an extended sync mark
AssigneeWestern Digital Technologies, Inc.
InventorsGuoxiao Guo, Jie Yu
Life of this patent
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Abstract
A disk drive is disclosed comprising a disk including a plurality of sectors each comprising a sector sync mark pattern and sector data preceding and following the sector sync mark pattern, and a head actuated over the disk for generating a read signal. A data sequence is detected from the read signal, and the data sequence is correlated with an extended sync mark comprising a target sync mark pattern and target data. The correlation of the target sync mark pattern with the data sequence is biased relative to the correlation of the target data with the data sequence.
Claims24
A disk drive comprising:
- a disk comprising a plurality of sectors each comprising a sector sync mark pattern and sector data preceding and following the sector sync mark pattern;
- a head actuated over the disk for generating a read signal;
- and
- control circuitry operable to:
- detect a data sequence from the read signal;
- correlate the data sequence with an extended sync mark comprising a target sync mark pattern and target data;
- and
- bias the correlation of the target sync mark pattern with the data sequence relative to the correlation of the target data with the data sequence.
A method of operating a disk drive comprising a disk comprising a plurality of sectors each comprising a sector sync mark pattern and sector data preceding and following the sector sync mark pattern, and a head actuated over the disk for generating a read signal, the method comprising:
- detecting a data sequence from the read signal;
- correlating the data sequence with an extended sync mark comprising a target sync mark pattern and target data;
- and
- biasing the correlation of the target sync mark pattern with the data sequence relative to the correlation of the target data with the data sequence.
Dependencies are inferred from the claim text.