Patent ID: 7995302

Claim:
A disk drive device comprising: a disk; a head configured to access the disk; a moving mechanism configured to support the head and to move the head along the radial direction of the disk; a sensor configured to detect a fall; and a controller configured to control the moving mechanism according to outputs of the sensor, wherein the controller is configured to check whether or not detection result data of the fall sensor indicates a fall on a predetermined occasion in command processing, and if a fall is recognized, the controller is configured to unload the head by controlling the moving mechanism; to issue a fake error, comprising a pseudo error notice having a same format as a real error notice, on an occasion in the command processing; to start an error recovery process for the fake error; and to conduct the check on the predetermined occasion in the error recovery process, and, if a fall is recognized, the controller is configured to unload the head by controlling the moving mechanism.