Patent ID: 6104556
Filing Date: 2000-08-15
Classification: G01R,G11B

Abstract:
A process of increasing the testing efficiency of a recording surface of a recording disc, the process comprising:a. supporting at least one head having a read element and a write element adjacent a recording surface of a recording disc;b. providing relative rotational motion between the recording surface and the at least one head;c. writing a signal onto the recording surface of the disc during a first rotation of the recording surface, to thereby define a first annular write track having a first write track width in the radial direction of the disc;d. reading the signal written onto the recording surface in a first reading track width defined within said first write track width by the reading element during a second rotation of the disc wherein the first reading track has a track width less than the first write track width;e. reading the signal written onto the recording surface in a second reading track width defined within said first write track width by the reading element during a third rotation of the disc wherein the second track width has a track width less than the first write track width and the second reading track width does not overlap the first reading track width; andf. analyzing the signals read in each of steps d. and e.