Disc device with head placement responsive to shock detection
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorMasami Yamane
Life of this patent
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Abstract
According to one embodiment, a disk device includes a base, a discoidal recording medium including an innermost circumferential portion and an outer circumferential edge, a head, a head actuator provided pivotably on the base and supporting the head movably, a first sensor which detects a shock and a drive unit which pivots, when the shock detected by the first sensor is greater than a predetermined value and the head is located at a position less than a predetermined distance from the innermost circumferential portion, the head actuator to place the head at a position more than the predetermined distance which satisfies a conditional formula below. D = 9.83 e - 210 t 2 G
Claims10
A disk device comprising:
- a base;
- a discoidal recording medium supported rotatably by the base and including an innermost circumferential portion supported and an outer circumferential edge;
- a head which carries out data processing with respect to the recording medium;
- a head actuator provided pivotably on the base and supporting the head movably between the innermost circumferential portion and the outer circumferential edge;
- a first sensor which detects a shock applied;
- and
- a drive unit which pivots, when the shock detected by the first sensor is greater than a predetermined value and the head is located at a position less than a predetermined distance from the innermost circumferential portion, the head actuator to place the head at a position more than the predetermined distance,
- the predetermined distance satisfying a conditional formula below:
- D
- =
- 9.83
-
- e
- -
- 210
-
- t
- 2
- G
- where
- D:
- the predetermined distance from the innermost circumferential portion,
- t:
- a thickness of the recording medium, and
- G:
- a value of the shock.
Dependencies are inferred from the claim text.