Magnetic disk drive with a movable ramp mechanism for relieving impact upon loading and unloading

A magnetic disk drive comprising:

• a disk for storing information;
• a spindle motor for rotating the disk;
• a head for recording information into said disk and reproducing information from said disk;
• a suspension supporting a slider provided with said head;
• a carriage supporting said suspension;
• a voice coil motor for exerting a rotational torque to said carriage so as to locate said head on said disk;
• a base and a cover supporting and containing at least one of said spindle motor, said suspension, said carriage and said voice coil motor;
• and
• a ramp serving as a guide for unloading said head from said disk;
• wherein part of said suspension slides over said ramp so as to effect an unloading operation;
• and
• wherein the position or the posture of said ramp is changed by sliding movement of the part of said suspension over and with respect to said ramp during said unloading operation.