Patent ID: 8033008
Filing Date: 2011-10-11
Classification: B82Y,G11B,Y10T

Abstract:
1. A method for supporting manufacture of a magnetic disk as a discrete track recording medium having tracks formed in a magnetic layer and adapted to record information thereon, and a nonmagnetic region formed between the tracks and adapted to record no information thereon, the method comprising the steps of: detecting a defect present on a main surface of a disk-shaped glass substrate and producing defect information including a distance from a center of the glass substrate to the defect; and shipping the glass substrate along with the defect information as information for forming the nonmagnetic region to at least one of a place of manufacturing the magnetic disk using the glass substrate and a place of manufacturing a magnetic-disk storage device using the magnetic disk, wherein the nonmagnetic region is formed at a region where the defect is present.