Method for manufacturing magnetic disk device

A method for manufacturing a magnetic disk device including a magnetic disk and a magnetic head, the manufacturing method comprising:

• setting a plurality of learning positions in a radial direction of the magnetic disk;
• moving the magnetic head such that a read head of the magnetic head is located on a first learning position among the plurality of learning positions;
• learning repeatable run-out (RRO) correction information related to the first learning position when the read head is located on the first learning position using the read head;
• moving the magnetic head such that the read head is located on a second learning position among the plurality of learning positions, a write head of the magnetic head being located at a position passing through a part of a first range including the first learning position when the read head is located on the second learning position;
• and
• executing writing of the RRO correction information related to the first learning position to the first range using the write head in parallel while learning RRO correction information related to the second learning position using the read head when the read head is located on the second learning position.