Patent ID: 7903366

Claim:
A write-once type storage apparatus which supports a head having a recording element and a reading element at a distal end of a rotary actuator and reproduces information after once continuously writing the information to a disk medium by the recording element; the write-once type storage apparatus comprising: a recording processing unit, when write to an unused track adjacent to a recorded track is to be carried out, setting a track pitch narrower than a writing width of the recording element so that part of the recorded track overlapped with the unused track is overwritten and continuously recording the information on the disk medium toward one direction along with the track pitch; a first offset correcting unit reading a write/read offset from a storage table set in advance and correcting the write/read offset in the state that the reading element is positioned at a target track, the write/read offset being positional deviation between the recording element and the reading element; a second offset correcting unit correcting a write-once center offset, the write-once center offset being positional deviation between a read center of the reading element, which has undergone correction of the write/read offset by the first offset correcting unit, and an effective track width center of the write-once recording; and a reproduction processing unit reproducing the information of the disk medium by the reading element in the state that the write/read offset and the write-once center offset are corrected.