Patent ID: 6657811
Filing Date: 2003-12-02
Classification: G11B

Abstract:
A method of performing a seek operation in a disk drive connectable to a mobile device that operates in a mobile environment using battery power and that operates in a docked environment using an external source of power, the disk drive having a spindle motor that rotates a storage media at an operating angular velocity, the disk drive operating with a servo system that includes a head actuator drive circuit that applies a current to a head actuator to cause the head actuator to move a head to a track of the storage media and to maintain a position of the head over a selected track of the storage media, the mobile device providing a command to the disk drive to cause the servo system to perform the seek operation to the selected track, the method comprising the steps of:receiving an environment signal from the mobile device that indicates whether the mobile device is operating in the docked environment or the mobile environment; rotating the storage media at a same nominal operating angular velocity in the mobile environment and in the docked environment; and responding to the environment signal and to the command from the host processor to perform one of: applying a first set of digital values to the head actuator drive circuit to apply a first current profile to the head actuator to cause the head actuator to move the head to the selected track with a first velocity profile when the environment signal indicates that the mobile device is in the docked environment; and applying a second set of digital values to the head actuator drive circuit to apply a second current profile to cause the head actuator to move the head to the selected track with a second velocity profile when the environment signal indicates that the mobile device is in the mobile environment.