Reducing acoustic noise in a disk drive when exiting idle mode
AssigneeWestern Digital Technologies, Inc.
InventorsMingji Lou, Orhan Beker, Jenghung Chen
Life of this patent
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Abstract
A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks, wherein each track comprises a plurality of servo sectors. When entering an idle mode, the head is floated over the disk, and when exiting the idle mode, a radial velocity of the head is measured, a seek distance is determined in response to the radial velocity, and a seek operation seeks the head the seek distance to a first track.
Claims10
A disk drive comprising:
- a disk comprising a plurality of tracks, wherein each track comprises a plurality of servo sectors;
- a head actuated over the disk;
- and
- control circuitry comprising a servo control system to actuate the head over the disk, the control circuitry operable to:
- when entering an idle mode, disable the servo control system in order to float the head over the disk;
- and
- when exiting the idle mode:
- enable the servo system;
- measure a radial velocity of the head;
- determine a seek distance in response to the radial velocity;
- and
- seek the head the seek distance to a first track.
A method of operating a disk drive, the disk drive comprising a head actuated over a disk comprising a plurality of tracks, wherein each track comprises a plurality of servo sectors, the method comprising:
- when entering an idle mode, disabling a servo control system operable to actuate the head over the disk in order to float the head over the disk;
- and
- when exiting the idle mode:
- enabling the servo control system
- measuring a radial velocity of the head;
- determining a seek distance in response to the radial velocity;
- and
- seeking the head the seek distance to a first track.
Dependencies are inferred from the claim text.