Control apparatus, storage device, and head retracting method
View Patent ↗A retraction control unit controls a retraction of a head of a storage device to a retraction position apart from a ramp by a predetermined distance. When the head is retracted from the retraction position to the ramp, a speed control unit controls a speed of the head to ascend the ramp to be constant by outputting a preset control signal.
1. A control apparatus for a storage device that controls a head to access data on a storage medium, the control apparatus comprising:
a retraction control unit that retracts the head to a retraction position apart from a ramp by a predetermined distance;
a speed control unit that controls, when the head is retracted from the retraction position to the ramp, a speed of the head to ascend the ramp to be kept constant by outputting a preset control signal; and
a selecting unit that selects one setting from at least three settings of the speed of the head for retracting to the ramp; wherein
the speed control unit retracts the head to the ramp based on the selected setting.
2. The control apparatus according to claim 1 , wherein
the speed control unit adjusts the speed of the head for retracting to the ramp, when the storage medium has a plurality of platters, based on a number of the platters of the storage medium.
3. The control apparatus according to claim 1 , wherein
the speed control unit adjusts the speed of the head for retracting to the ramp based on a temperature of the storage device.
4. The control apparatus according to claim 1 , wherein the speed control unit decelerates the head when the head has ascended the ramp.
5. The control apparatus according to claim 1 , wherein
the speed control unit makes the speed of the head at a time of the head colliding with a stopper below a predetermined speed.
6. The control apparatus according to claim 1 , wherein
the speed control unit presses the head against a stopper for a predetermined time after the head colliding with the stopper.
7. A storage device that controls a head to access data on a storage medium, the storage device comprising:
a retraction control unit that retracts the head to a retraction position apart from a ramp by a predetermined distance; and
a speed control unit that controls, when the head is retracted from the retraction position to the ramp, a speed of the head to ascend the ramp to be kept constant by outputting a preset control and
a selecting unit that selects one setting from at least three settings of the speed of the head for retracting to the ramp; wherein
the speed control unit retracts the head to the ramp based on the selected setting.
8. The storage device according to claim 7 , wherein
the speed control unit adjusts the speed of the head for retracting to the ramp, when the storage medium has a plurality of platters, based on a number of the platters of the storage medium.
9. The storage device according to claim 7 , wherein
the speed control unit adjusts the speed of the head for retracting to the ramp based on a temperature of the storage device.
10. The storage device according to claim 7 , wherein
the speed control unit decelerates the head when the head has ascended the ramp.
11. The storage device according to claim 7 , wherein
the speed control unit makes the speed of the head at a time of the head colliding with a stopper below a predetermined speed.
12. The storage device according to claim 7 , wherein
the speed control unit presses the head against a stopper for a predetermined time after the head colliding with the stopper.
13. A head retracting method of retracting a head from a storage medium, the head retracting method comprising:
retracting the head to a retraction position apart from a ramp by a predetermined distance;
controlling, when the head is retracted from the retraction position to the ramp, a speed of the head to ascend the ramp to be kept constant by outputting a preset control signal; and
selecting one setting from at least three settings of the speed of the head for retracting to the ramp; wherein
the controlling includes retracting the head to the ramp based on the selected setting.
14. The head retracting method according to claim 13 , wherein
the controlling includes adjusting the speed of the head for retracting to the ramp, when the storage medium has a plurality of platters, based on a number of the platters of the storage medium.
15. The head retracting method according to claim 13 , wherein
the controlling includes adjusting the speed of the head for retracting to the ramp based on a temperature of the storage device.
16. The head retracting method according to claim 13 , wherein
the controlling includes decelerating the head when the head has ascended the ramp.
17. The head retracting method according to claim 13 , wherein
the controlling includes making the speed of the head at a time of the head colliding with a stopper below a predetermined speed.