Operating a rotatable media storage device at multiple spin-speeds
First Claim
1. In a data storage device including a disk, a method for controlling a spin-speed at which an initial data transfer occurs after the disk begins to spin-up from rest, the method comprising:
- (a) spinning the disk up to a reduced spin-speed and beginning to perform the initial data transfer while the disk spins at the reduced spin-speed, if an initial amount of work that has been requested is below a threshold; and
(b) spinning the disk up to a further spin-speed, which is greater than the reduced spin-speed, and beginning to perform the initial data transfer while the disk spins at said further spin-speed, if the initial amount of work that has been requested is above said threshold.
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Accused Products
Abstract
A rotatable media storage device operates using multiple disk spin-speeds, e.g., a reduced spin-speed and a nominal spin-speed. A disk is spun up to a reduced spin-speed and an initial data transfer is began while the disk spins at the reduced spin-speed, if an amount of work that has been requested is below a threshold. The disk is spun up to a further spin-speed (e.g., a nominal spin-speed), which is greater than the reduced spin-speed, and the initial data transfer is began while the disk spins at the further spin-speed, if the amount of work that has been requested is above the threshold. Alternative embodiments using multiple disk spin-speeds are also provided.
41 Citations
21 Claims
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1. In a data storage device including a disk, a method for controlling a spin-speed at which an initial data transfer occurs after the disk begins to spin-up from rest, the method comprising:
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(a) spinning the disk up to a reduced spin-speed and beginning to perform the initial data transfer while the disk spins at the reduced spin-speed, if an initial amount of work that has been requested is below a threshold; and
(b) spinning the disk up to a further spin-speed, which is greater than the reduced spin-speed, and beginning to perform the initial data transfer while the disk spins at said further spin-speed, if the initial amount of work that has been requested is above said threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In a data storage device including a disk, a method for controlling a spin-speed at which an initial data transfer occurs, between a host and the disk of the data storage device, after the disk begins to spin-up from rest, the method comprising:
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(a) spinning the disk up to one of a plurality of different spin-speeds at which the data storage device can operate, as instructed by the host; and
(b) beginning to perform a data transfer at said instructed spin-speed. - View Dependent Claims (12)
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13. In a data storage device including a disk, a method for controlling a spin-speed at which an initial data transfer occurs after the disk begins to spin-up from rest, the method comprising:
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(a) spinning the disk up to a reduced spin-speed and performing an initial data transfer while the disk spins at said reduced spin-speed; and
(b) spinning the disk up to a nominal spin-speed, which is greater than said reduced spin-speed, and performing an additional data transfer while the disk spins at said nominal spin-speed.
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14. In a data storage device including a disk, an actuator assembly having a head for reading from and/or writing to the disk, and a load/unload ramp on which to park the head, a method for reducing the amount of time it takes for a head to begin reading from and/or writing to the disk after the actuator assembly has been parked on the load/unload ramp, the method comprising:
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(a) monitoring a disk spin-speed as the disk is spinning up to a selected spin-speed;
(b) beginning a ramp load operation before the disk spin-speed reaches said selected spin-speed, but such that the disk will achieve said selected spin-speed prior to the head reaching an outer diameter of the disk; and
(c) performing an initial data transfer at said selected spin-speed. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification