Patent ID: 7706094

Claim:
A storage device comprising: a storage medium that is subjected to first servo writing processing for writing servo information from one of an inner cylinder and an outer cylinder to a predetermined cylinder and, after the first servo writing processing, subjected to second servo writing processing for writing servo information from other one of the inner cylinder and the outer cylinder to the predetermined cylinder, the servo information written in the first servo writing processing and the servo information written in the second servo writing processing being written to overlap each other near the predetermined cylinder in the first servo writing processing and the second servo writing processing; a head that reads out the information written in the storage medium; and a head-position control unit that reads out the servo information written in the storage medium using the head and controls a position of the head using the read-out servo information, wherein the servo information written in the first servo writing processing and the servo information written in the second servo writing processing have different mark patterns and the head-position control unit acquires cylinder information and the mark patterns from the servo information written in the storage medium and controls the position of the head based on the acquired cylinder information and mark patterns.