Patent ID: 7570448

Claim:
A write-once type storage apparatus which supports a head having a recording element and a reading element at the leading end of a rotary actuator, and after writing once information by said head into a disk medium, reproduces the once written information, comprising: a write processing unit which sequentially writes information from a track for which the yaw angle of said actuator in the recording track area of said disk medium becomes the largest toward a track for which the yaw angle becomes 0°; and a read processing unit which reads out the information write-once-written into said disk medium from a track giving a large yaw angle toward a track giving a decreasing yaw angle and wherein said write processing unit writes information at the smallest track pitch at which the error rate or the mismatch number of the data read out by said read processing unit from the track having the largest yaw angle becomes smaller than a prescribed threshold value.