Data storage device with self-learning oscillation detector
AssigneeWestern Digital Technologies, Inc.
InventorSandy Xianghui Xiao
Life of this patent
Estimating the term…
Abstract
Various illustrative aspects are directed to a data storage device, method, and one or more processing devices that are configured to: generate an expected oscillation spectrum associated with a band of the selected disk; detect oscillation abnormality of the selected head based on comparing an actual oscillation spectrum associated with a data sector in the band to the expected oscillation spectrum associated with the band, wherein the data sector includes data written by the selected head; and perform a remediation action in response to detecting oscillation abnormality of the selected head.
Claims20
A data storage device, comprising:
- one or more disks;
- an actuator mechanism configured to position a selected head among one or more heads proximate to a corresponding disk surface of a selected disk among the one or more disks;
- and
- one or more processing devices, individually or in combination, configured to:
- generate an expected oscillation spectrum associated with a band of the selected disk;
- detect oscillation abnormality of the selected head based on comparing an actual oscillation spectrum associated with a data sector in the band to the expected oscillation spectrum associated with the band, wherein the data sector includes data written by the selected head;
- and
- perform a remediation action in response to detecting oscillation abnormality of the selected head.
A method comprising:
- generating an expected oscillation spectrum associated with a band of a selected disk in a disk drive;
- detecting oscillation abnormality of a selected head in the disk drive based on comparing an actual oscillation spectrum associated with a data sector in the band to the expected oscillation spectrum associated with the band, wherein the data sector includes data written by the selected head;
- and
- performing a remediation action in response to detecting oscillation abnormality of the selected head,
- wherein the generating the expected oscillation spectrum, the detecting oscillation abnormality of the selected head, and the performing the remediation action are performed by one or more processing devices individually or in combination.
One or more processing devices comprising, individually or in combination:
- means for generating and updating an expected oscillation spectrum associated with a band of a selected disk in a disk drive;
- means for detecting oscillation abnormality of a selected head in the disk drive based on comparing an actual oscillation spectrum associated with a data sector in the band to the expected oscillation spectrum associated with the band, wherein the data sector includes data written by the selected head;
- and
- means for performing a remediation action in response to detecting oscillation abnormality of the selected head.
Dependencies are inferred from the claim text.