Methods and devices for enhanced adaptive margining based on channel threshold measure
AssigneeWestern Digital Technologies, Inc.
InventorsSan Yuan Liew, Suttisak Nilchim, Petrus Hu, Theivarayan Prakash Somasundaram
Life of this patent
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Abstract
A disk drive configured to enable media defect margining during disk testing may comprise a disk comprising a plurality of tracks; a head actuated over the disk; and a processor operable to test media of the disk drive to detect a media defect; estimate a depth of the detected media defect; determine a margining amount based on at least the estimated depth of the detected media defect, and apply the determined margining amount to the detected media defect.
Claims31
A disk drive to enable defect margining during disk testing, comprising:
- a processor operable to:
- test media of the disk drive to detect a media defect;
- estimate a depth of the detected media defect;
- determine a margining amount based on at least the estimated depth of the detected media defect;
- and
- apply the determined margining amount to the detected media defect.
A method to enable defect margining during testing of a disk drive, comprising:
- testing media of the disk drive to detect a media defect;
- estimating a depth of the detected media defect;
- determining a margining amount based on at least estimated depth of the detected media defect;
- and
- applying the determined margining amount to the detected media defect.
A method to enable defect margining during testing of a disk drive, comprising:
- testing media of the disk drive to detect a media defect;
- estimating a depth of the detected media defect;
- determining a margining amount based on at least one of the estimated depth, an estimated length, and a detected thermal asperity of the detected media defect, and
- applying the determined margining amount to the detected media defect.
Dependencies are inferred from the claim text.