Patent ID: 6940793
Filing Date: 2005-09-06
Classification: G06F,G11B

Abstract:
1. A rotation speed changing method for a disk drive comprising a disk motor for rotating a disk, a disk motor driver for driving said disk motor, a controller device for controlling said disk motor driver, and a detector for detecting whether or not said disk is replaced, said method comprising: receiving an upper limit value of a disk rotation speed as an input value; interpreting said input value as a rotation speed specification to generate a command packet including said upper limit value of the disk rotation speed; outputting said command packet to said controller of said disk drive; setting, with said controller, an upper limit of the disk rotation speed, for the disk motor driver, to said upper limit value included in said command packet; driving said disk motor at said set upper limit of the disk rotation speed with said disk motor driver; and controlling, with said controller, said disk motor driver to set the upper limit of said disk rotation speed to a value of an initial state, when said detector detects that said disk is replaced, wherein: said disk drive is controlled by a computer, said computer is operated by a program that performs said receiving and generating operations, and said program resides in said computer.