Patent ID: 6943977

Claim:
A servo writing apparatus which records servo patterns on a disk medium incorporated in a disk drive including a head and the disk medium in which a pattern for position detection in a rotation direction is recorded, the head including a read head device and write head device, the disk drive having a constitution in which a positional relation between the read head device and write head device relatively deviates in an inner or outer peripheral direction of the disk medium, the servo writing apparatus comprising: detection means for detecting a position of the head positioned on the disk medium in the rotation direction based on the pattern for position detection read by the read head device; servo pattern write means for writing the servo pattern as a reference for one rotation in the position by the write head device based on a detected result from the detection means, when the head is moved to an innermost peripheral position or an outermost peripheral position on the disk medium, so that the servo pattern is additionally recorded every rotation successively in the outer or inner peripheral direction from the servo pattern; and head positioning control means for executing a positioning control of the head, when the servo pattern recorded on the disk medium is read by the read head device, and the additional recording operation is performed based on the servo pattern.