Write-once type storage apparatus, control method and record control circuit

1. 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.

2. The write-once type storage apparatus according to claim 1 , wherein said write processing unit writes information sequentially from the outermost track of said disk medium toward a track giving a yaw angle of 0°, and then writes information sequentially from the innermost track toward a track giving a yaw angle of 0°.

3. The write-once type storage apparatus according to claim 1 , wherein said write processing unit writes information sequentially from the innermost track of said disk medium toward a track giving a yaw angle of 0°, and then writes information sequentially from the outermost track toward a track giving a yaw angle of 0°.

4. The write-once type storage apparatus according to claim 1 , wherein said write processing unit divides the recording track area of said disk medium into an outer zone and an inner zone with a yaw angle of 0° as a boundary, alternately selects sequentially tracks of said outer zone and inner zone and write information from the track giving the largest yaw angle toward a track giving a yaw angle of 0°.

5. A control method of a write-once type storage apparatus which supports a head having a recording element and a reading element on a leading end of an actuator, and after once writing information into a disk medium by said head, the information is reproduced, comprising:

a write processing step of writing information sequentially from a track giving the largest yaw angle of said actuator in the recording track area of said disk medium to a track giving a yaw angle of 0°; and

a read processing step of reading out the information write-once-written in said disk medium from the track of a larger yaw angle to the track of a decreasing yaw angle; and

wherein said write processing step 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.

6. The control method of a write-once type storage apparatus according to claim 5 , wherein said write processing step comprises writing information sequentially from the outermost track of said disk medium toward a track giving a yaw angle of 0°, and then writing information sequentially from the innermost track toward a track giving a yaw angle of 0°.

7. The control method of a write-once type storage apparatus according to claim 5 , wherein said write processing step comprises writing information sequentially from the innermost track of said disk medium toward a track giving a yaw angle of 0°, and then writing information sequentially from the outermost track toward a track giving a yaw angle of 0°.

8. The control method of a write-once type storage apparatus according to claim 5 , wherein said write processing step comprises dividing the recording track area of said disk medium into an outer zone and an inner zone with a yaw angle of 0° as a boundary, alternately selecting sequentially tracks of said outer zone and inner zone and writing information from the track giving the largest yaw angle toward a track giving a yaw angle of 0°.

9. A record control circuit which controls information recording on a disk medium by a head supported by a rotary actuator, comprising:

a write processing unit which writes information sequentially from a track giving the largest yaw angle of said actuator in the recording track area of said disk medium to a track giving a yaw angle of 0°; and

a read processing unit which reads out the information write-once-written in said disk medium from the track of a larger yaw angle to the track of 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.

10. The record control circuit according to claim 9 ,

wherein said write processing unit writes information sequentially from the outermost track of said disk medium toward a track giving a yaw angle of 0°, and then writes information sequentially from the innermost track toward a track giving a yaw angle of 0°.

11. The record control circuit according to claim 9 , wherein write processing unit writes information sequentially from the innermost track of said disk medium toward a track giving a yaw angle of 0°, and then writes information sequentially from the outermost track toward a track giving a yaw angle of 0°.

12. The record control circuit according to claim 9 ,

wherein said write processing unit divides the recording track area of said disk medium into an outer zone and an inner zone with a yaw angle of 0° as a boundary, alternately selects sequentially tracks of said outer zone and inner zone and writes information from the track giving the largest yaw angle toward a track giving a yaw angle of 0°.