Magnetic disk device and method

A method of controlling a magnetic disk device, the magnetic disk device including two or more magnetic disks, a group of magnetic heads, and a motor, the two or more magnetic disks including two or more recording surfaces and being integrally rotated, the group of magnetic heads facing mutually different recording surfaces among the two or more recording surfaces, the motor integrally moving the group of magnetic heads in a radial direction of the two or more magnetic disks, the method comprising:

• executing a first command, the first command being a command for accessing a first recording surface among the two or more recording surfaces;
• executing a seek operation for executing a second command subsequent to completion of access according to the first command, the second command being a command for accessing a second recording surface different from the first recording surface among the two or more recording surfaces;
• and
• executing the second command subsequent to completion of the seek operation,
• wherein the seek operation includes
• performing a waiting operation in accordance with a relative velocity in the radial direction between a first magnetic head and a second magnetic head after the completion of the access according to the first command, the first magnetic head being a magnetic head facing the first recording surface in the group of magnetic heads, the second magnetic head being a magnetic head facing the second recording surface in the group of magnetic heads, and
• executing, subsequent to the waiting operation, switching of a magnetic head in use from the first magnetic head to the second magnetic head and starting of movement of the group of magnetic heads using the motor.