Defect registration method of magnetic disk, and m

专利名称：Defect registration method of magnetic

disk, and magnetic disk drive

发明人：Masaki Kudoh,Toshiaki Satoh申请号：US11223068申请日：20050908公开号：US07583461B2公开日：20090901

专利附图：

摘要：Embodiments of the present invention provide a defect registration method forperforming defect registration of sectors on a magnetic disk. In one embodiment, arectangular detection window is applied to each defect sector. A threshold value of the

detection window is set at 2. In addition, an additional sector group is defined for thedetection window. The additional sector group is a target of the defect registration if thenumber of defect sectors exceeds the threshold value. The additional sector groupcovers sectors that are not judged as defects in defect detection inspection, but that areexpected to be potentially defective. Even if the detection window is applied to a defectsector, an additional sector group is not generated. However, if the detection window isapplied to a defect sector, an additional sector group is generated. If the detectionwindow is applied to a defect pattern, an additional sector group is generated.

申请人：Masaki Kudoh,Toshiaki Satoh

地址：Tokyo JP,Kanagawa JP

国籍：JP,JP

代理机构：Townsend and Townsend and Crew LLP

代理人：Patrick Duncan

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