Magnetic disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsKoji Miyake, Takuya Ogawa, Wataru Tsukahara
Life of this patent
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Abstract
According to one embodiment, a magnetic disk device includes a magnetic disk, a spindle motor, a magnetic head, a ramp load mechanism, a filter, and a control section. The control section rotates the spindle motor at a second rotating speed for a given period of time at startup of the device, and then loads the magnetic head from the ramp load mechanism to a prescribed position on the magnetic disk. The second rotating speed is higher than a first rotating speed at which the spindle motor is rotated at the magnetic head reads/writes data from/to the magnetic disk.
Claims6
A magnetic disk device comprising:
- a magnetic disk;
- a spindle motor which rotates the magnetic disk;
- a magnetic head which reads/writes data from/to the magnetic disk;
- a ramp load mechanism which loads the magnetic head to a prescribed position on the magnetic disk;
- a filter which an airflow generated by rotation of the magnetic disk passes when the magnetic disk is rotated by the spindle motor;
- and
- a control section which rotates the spindle motor at a second rotating speed for a given period of time at startup of the device, and then loads the magnetic head from the ramp load mechanism to a prescribed position on the magnetic disk,
- wherein the second rotating speed is higher than a first rotating speed at which the spindle motor is rotated at the magnetic head reads/writes data from/to the magnetic disk, and
- wherein the control section carries out feedback control to cause the magnetic disk to rotate at the first rotating speed after rotating the spindle motor for a given period of time, and loads the magnetic head from the ramp load mechanism to the prescribed position on the magnetic disk after a rotating speed of the magnetic disk comes to steadily remain the first rotating speed due to the feedback control.
Dependencies are inferred from the claim text.