公开(公告)号：US07839588B1

公开(公告)日：2010-11-23

申请号：US12122710

申请日：2008-05-18

申请人： Dean V. Dang ,  Kek Ming Chua ,  Philip Bernard Saram ,  William J. Seamon

发明人： Dean V. Dang ,  Kek Ming Chua ,  Philip Bernard Saram ,  William J. Seamon

IPC分类号： G11B27/36 ,  G11B5/09

CPC分类号： G11B5/09 ,  G11B20/18 ,  G11B27/36 ,  G11B2020/1896 ,  G11B2220/2516 ,  G11B2220/2525 ,  G11B2220/2537

摘要： Defects are identified in a disk drive by first writing a pattern of tracks to a disk surface in the disk drive, the pattern of tracks including written tracks alternating with unwritten tracks. The written tracks of the pattern of tracks are read, and a defect in a portion of a first written track is detected. An unread portion of a first unwritten track is then identified as comprising a defect based at least in part on the defect in the first written track, the first unwritten track located proximate the first written track.

摘要翻译： 通过首先将磁迹图案写入磁盘驱动器中的磁盘表面，磁盘驱动器中的缺陷被识别，磁道的图案包括与未写入轨道交替的写入轨迹。 读取轨道图案的写入轨迹，并且检测到第一写入轨迹的一部分中的缺陷。 然后将第一未写入轨道的未读部分识别为至少部分地基于第一写入轨道中的缺陷，位于第一写入轨道附近的第一未写入轨道来构成缺陷。

公开(公告)号：US09042045B1

公开(公告)日：2015-05-26

申请号：US11933662

申请日：2007-11-01

申请人： Dean V. Dang ,  Kek Ming Chua ,  King S. Goh ,  Prakash Balasubramaniam ,  Ming Jin

发明人： Dean V. Dang ,  Kek Ming Chua ,  King S. Goh ,  Prakash Balasubramaniam ,  Ming Jin

IPC分类号： G11B27/36 ,  G11B5/09 ,  G11B5/596 ,  G11B20/18 ,  G11B20/12

CPC分类号： G11B20/1816 ,  G11B20/1883 ,  G11B2020/1282 ,  G11B2020/183

摘要： A disk drive is disclosed including a disk having a plurality of sectors, and a head actuated over the disk. A defect threshold is initialized, and a first sector is read to generate a first read signal. The first read signal is processed to detect a defect in the first sector relative to the defect threshold. After detecting the defect, the defect threshold is adjusted and the first sector is reread to generate a second read signal. The second read signal is processed to detect the defect in the first sector relative to the adjusted defect threshold.

摘要翻译： 公开了一种磁盘驱动器，其包括具有多个扇区的盘，以及在盘上驱动的磁头。 初始化缺陷阈值，并且读取第一扇区以产生第一读取信号。 处理第一读取信号以相对于缺陷阈值检测第一扇区中的缺陷。 在检测到缺陷之后，调整缺陷阈值并重新读取第一扇区以产生第二读取信号。 处理第二读取信号以相对于调整的缺陷阈值检测第一扇区中的缺陷。