Storage device with pulsed motor torque
AssigneeHewlett-Packard Development Company, L.P.
InventorsDonald J. Fasen, Vernon L. Knowles
Life of this patent
Estimating the term…
Abstract
A system and method for overcoming adhesion between media and a surface of a storage device in contact with the media. A storage device comprises a media velocity detector and a media drive motor controller. The media velocity detector detects storage media velocity as torque is applied to a storage media. The media drive motor controller causes a media drive motor to apply acceleration torque to the storage media. If the media velocity detector detects no increase in media velocity as acceleration torque is applied to the storage media, then the media drive motor controller causes the media drive motor to apply a torque pulse to the storage media.
Claims20
A storage device, comprising:
- a media velocity detector that detects storage media velocity as torque is applied to a storage media;
- and
- a media drive motor controller that causes a media drive motor to apply acceleration torque to the storage media;
- wherein the media drive motor controller causes the media drive motor to apply a torque pulse to the storage media based on the media velocity detector detecting no increase in media velocity as acceleration torque is applied to the storage media;
- wherein the media drive motor controller causes the torque pulse to transition from a lower torque to a higher torque more rapidly than the acceleration torque transitions from the lower torque to the higher torque.
A method, comprising:
- applying acceleration torque to a storage media of a storage device;
- monitoring storage media velocity;
- determining that media velocity is not increasing as acceleration torque is applied to the storage media;
- and
- applying a torque pulse to the storage media to overcome adhesion between the media and a storage device surface in contact with the media;
- wherein the torque pulse transitions from a lower torque to a higher torque more rapidly than the acceleration torque transitions from the lower torque to the higher torque.
A tape drive, comprising:
- means for determining that a magnetic tape is adhering to a surface of the tape drive during application of acceleration torque;
- means for applying a torque pulse to a magnetic tape reel to release the magnetic tape from a tape drive surface;
- wherein the means for applying the torque pulse causes the torque pulse to transition from a lower torque to a higher torque more rapidly than the acceleration torque transitions from the lower torque to the higher torque.
Dependencies are inferred from the claim text.