Patent ID: 7420761

Claim:
A control apparatus for a storage device that moves a head located on a storage medium surface to a predetermined destination position for a retracting the head when a fall detecting sensor detects a fall of the storage device, the control apparatus comprising: a falling-time measuring unit that measures time for which the fall of the storage device is consecutively detected by the fall detecting sensor; a head-position detecting unit that detects a position of the head on the storage medium when the falling-time measuring unit starts measuring the time for which the fall of the storage device is consecutively detected; a moving-time calculating unit that calculates necessary time for moving the head from the detected position of the head to a first destination position; a threshold calculating unit that calculates a first threshold based on the calculated necessary time; a first-threshold determining unit that determines whether the measured time is equal to or greater than the calculated first threshold; and a first head-movement processing unit that moves the head to the first destination position when the first-threshold determining unit determines that the measured time is equal to or greater than the first threshold.