Patent ID: 7031093
Filing Date: 2006-04-18
Classification: G11B

Abstract:
1. A storage device, comprising: a disk medium; a recording and reproducing head that floats over the disk medium and records or reproduces information in the disk medium; an actuator that supports the recording and reproducing head and moves the recording and reproducing head in a radial direction of the disk medium; a driving unit that drives the actuator; a speed detection unit that detects a moving speed of the actuator; a speed control unit that controls the moving speed of the actuator by a feedback control based on a difference between a detected moving speed of the actuator and a target speed; a ramp member arranged outside the disk medium used for loading and unloading the recording and reproducing head; a position detection unit that detects a position of the recording and reproducing head; and a position determination unit that determines whether the detected position of the recording and reproducing head reaches a first predetermined position in operations of loading or unloading the recording and reproducing head, wherein the speed control unit comprises one of a bandwidth switching unit that switches a bandwidth of the feedback control to a wide bandwidth based on a result of the position determination, and a feed-forward compensation unit that adds a predetermined feed-forward control variable to a control variable of the feed-back control based on the result of the position determination.