Patent ID: 7253581

Claim:
A data storage device, comprising: a storage disk configured to store data; a motor configured to rotate said storage disk; a memory configured to store a parameter table containing registered position detection parameter values corresponding to possible supply voltage values; and a motor control section configured to control said motor; wherein said motor control section includes: a parameter setup section configured to reference said parameter table, to determine which of said registered position detection parameter values correspond to an acquired supply voltage value of a supply voltage, and to set said determined parameter value in a register, said determined parameter value being used for detecting the position of said motor and for providing drive current parameters for driving said motor; an induced voltage detection section configured to detect a voltage induced on a coil of said motor in accordance with said determined parameter value set by said parameter setup section; and a rotor position determination section configured to determine the rotor position of said motor in accordance with said induced voltage detected by said induced voltage detection section.