Patent ID: 7193951
Filing Date: 2007-03-20
Classification: G11B

Abstract:
1. A disk apparatus which rotates a disk recording medium formed with a first emboss mark along a track in a predetermined period, radiates onto said track a laser beam having a different light amount depending on a time of an execution and an interruption of a recording process, and detects a first emboss mark signal associated with said first emboss mark based on said laser beam reflected from said track, comprising: a generating means for generating a clock signal based on a comparison result between a level of said first emboss mark signal and a threshold value; a receiving means for receiving a change request between an execution/interruption of said recording process; a first determining means for determining a first numeral as said threshold value from a reception of said change request until a passing of a predetermined time period; and a second determining means for determining a second numeral associated with a peak level of said first emboss mark signal as said threshold value after said predetermined time period passed.