| 摘要 |
A magnetic disk inspection apparatus for recording and reproducing inspection signals onto and from each track on a magnetic disk, in which the inspection signals are recorded and reproduced automatically without a manual operation onto and from the magnetic disk, the maximum value is detected from the reproduction signals on the basis of the sampling signal, the average value of the maximum values is calculated for each sector, the difference between the average values in the same sector number of the adjacent tracks is determined, the change ratio based on this difference is calculated and quality of the magnetic disk is judged on the basis of this change ratio.
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