Data storage device with rapid in-field repeatable runout noise removal calibration
AssigneeWestern Digital Technologies, Inc.
InventorsSandy Xianghui Xiao, Noureddine Kermiche
Life of this patent
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Abstract
Various aspects are directed to 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 among the one or more disks, and one or more processing devices. The one or more processing devices are configured to detect repeatable runout (RRO) noise components from a measurement of fly height of the selected head above one or more sectors of a fly height measurement track, and remove the detected RRO noise components from one or more per-sector readback signal measurements.
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 among the one or more disks;
- and
- one or more processing devices configured individually or in combination to:
- detect repeatable runout (RRO) noise components from a measurement of fly height of the selected head above one or more sectors of a fly height measurement track;
- and
- remove the detected RRO noise components from one or more per-sector readback signal measurements.
A method comprising:
- detecting, by one or more processing devices individually or in combination, repeatable runout (RRO) noise components from a measurement of fly height of a selected head of a data storage device above one or more sectors of a fly height measurement track of a corresponding disk surface among one or more disks of the data storage device;
- and
- removing, by the one or more processing devices, the detected RRO noise components from one or more per-sector readback signal measurements.
One or more processing devices individually or in combination comprising:
- means for detecting repeatable runout (RRO) noise components from a measurement of fly height of a selected head of a data storage device above one or more sectors of a fly height measurement track of a corresponding disk surface among one or more disks of the data storage device;
- and
- means for removing the detected RRO noise components from one or more per-sector readback signal measurements.
Dependencies are inferred from the claim text.