Servo pattern writing method, control circuit, and magnetic disk apparatus

A servo pattern writing method comprising:

• moving a head from a first one of an innermost circumference and an outermost circumference of a medium to the remainder other than the first one while controlling a position of the head in accordance with a temporary pattern indicating information for controlling the position of the head, the temporary pattern being preliminarily written on the medium;
• calculating a junction between a servo pattern to be written from the innermost circumference and a servo pattern to be written from the outermost circumference based on a movement distance of the moved head;
• first writing the servo pattern from a second one of the innermost circumference and the outermost circumference to the junction, while controlling the position of the head in accordance with the temporary pattern, after moving the head to the second one;
• and
• second writing the servo pattern from the remainder other than the second one to the junction, while controlling the position of the head in accordance with the temporary pattern, after moving the head to the remainder other than the second one.