Magnetic disk device

A disk device comprising:

• a rotatable magnetic disk;
• an actuator which supports and moves a head in a radial direction of the magnetic disk;
• a ramp which holds the head at an unloaded position on an outer circumferential side of the magnetic disk;
• a motor which rotates the magnetic disk;
• and
• a controller which performs a load operation of loading the head from the ramp onto the magnetic disk and a whole surface seek operation of moving the head from an outermost circumference to an innermost circumference of the magnetic disk after loading, at an activation of the disk device, and which when a radial travel speed of the head during the load operation is referred to as Vr1, a circumferential travel speed of the head based on rotation of the magnetic disk during the load operation is referred to as Vt1, a radial travel speed of the head during the whole surface seek operation is referred to as Vrs, and a circumferential travel speed of the head during the whole surface seek operation is referred to as Vts, controls at least one of the radial travel speed of the head and number of revolutions of the magnetic disk to satisfy a relationship (Vr1/Vt1)<(Vrs/Vts).