公开(公告)号：US06990607B2

公开(公告)日：2006-01-24

申请号：US09965669

申请日：2001-09-27

申请人： Jeffrey Soon Beng Sim ,  WeiLoon Ng ,  Aik Chuan Lim ,  YongPeng Chng ,  Kay Hee Tang ,  Steven TianChye Cheok

发明人： Jeffrey Soon Beng Sim ,  WeiLoon Ng ,  Aik Chuan Lim ,  YongPeng Chng ,  Kay Hee Tang ,  Steven TianChye Cheok

IPC分类号： G06F11/00

CPC分类号： G11B20/1883 ,  G11B2220/20

摘要： In one embodiment of the present invention, systems and methods are provided through which the capacity of a defect buffer in a microcontroller of a mass storage device is determined without regard for the quantity of defects on a recording medium. The capacity of the defect buffer is determined in varying examples, based on the amount of available buffer space and/or the application of the storage device. In one embodiment, the capacity of the defect buffer is less than the quantity of defects on the recording medium, wherein entries in a defect table on the recording medium are swapped in and out of the defect buffer as needed, such as using a most-recently-used scheme. In another embodiment of the present invention, systems and methods are provided through which the defect table is partitioned into a plurality of segments that are physically distributed throughout the recording medium.

公开(公告)号：US06940671B2

公开(公告)日：2005-09-06

申请号：US09963879

申请日：2001-09-26

申请人： Edmun ChianSong Seng ,  AikChuan Lim ,  Kay Hee Tang ,  UttHeng Kan ,  Jeffrey Soon Beng Sim

发明人： Edmun ChianSong Seng ,  AikChuan Lim ,  Kay Hee Tang ,  UttHeng Kan ,  Jeffrey Soon Beng Sim

IPC分类号： G11B5/09 ,  G11B7/005 ,  G11B20/10 ,  G11B20/18 ,  G11B27/36 ,  H04L1/00 ,  H04L1/20

CPC分类号： H04L1/20 ,  G11B5/09 ,  G11B7/005 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10296 ,  G11B20/182 ,  G11B27/36 ,  G11B2220/20 ,  H04B17/336 ,  H04L1/0054 ,  H04L1/0071 ,  H04L1/242 ,  H04L25/03012

摘要： Systems and methods are provided through which a time domain equalized signal-to-noise-ratio (ESNR) of an electronic device is determined by executing ESNR determining firmware in the electronic device. The ESNR is used to perform rejection/acceptance testing of the electronic device during manufacturing of the device, and/or to perform read channel tuning and optimization. In one embodiment, determination of the ESNR includes both phase level retry and global level retry.

摘要翻译： 提供了通过在电子设备中执行ESNR确定固件来确定电子设备的时域均衡信噪比（ESNR）的系统和方法。 ESNR用于在设备制造过程中执行电子设备的拒绝/验收测试，和/或执行读取通道调优和优化。 在一个实施例中，ESNR的确定包括阶段级重试和全局级重试。

公开(公告)号：US06754030B2

公开(公告)日：2004-06-22

申请号：US10029318

申请日：2001-12-21

申请人： Edmun Chian Song Seng ,  Xiong Liu ,  Aik Chuan Lim ,  Kay Hee Tang ,  Utt Heng Kan ,  Choon Kiat Lim

发明人： Edmun Chian Song Seng ,  Xiong Liu ,  Aik Chuan Lim ,  Kay Hee Tang ,  Utt Heng Kan ,  Choon Kiat Lim

IPC分类号： G11B500

CPC分类号： G11B20/20 ,  G11B5/59627 ,  G11B27/36 ,  G11B2220/20

摘要： A method of and apparatus for generating a reader-to-writer offset for a head positioned over a track on a disc in a disc drive having a plurality of tracks is disclosed. A reader and a writer are mounted on the head in a non-overlapping manner with a gap between the reader and the writer, which is known as the reader-to-writer offset. A disc drive controller is operably connected to the reader and the writer. The disc drive controller determines the reader-to-writer offset of the head for each track by computing the difference between a first head position x1 and a second head position x2. The first head position x1 is an optimal head position for writing information on the track and the second head position x2 is a midpoint of an off-track capability (OTC) of the head. The OTC is a portion of a track pitch over which the reader is expected to read information that is free of an incorrigible bit error such that the writer-to-reader track misregistration (TMR) is minimized as the head is radially displaced the reader-to-writer offset to read information written on the track or to write information on the track.

摘要翻译： 公开了一种用于为位于具有多个磁道的磁盘驱动器中的磁盘上的轨道上的磁头产生读取器到写入器偏移的方法和装置。 阅读器和写入器以不重叠的方式安装在头上，读取器和写入器之间的间隙被称为读写器偏移。 磁盘驱动器控制器可操作地连接到读取器和写入器。 磁盘驱动器控制器通过计算第一磁头位置x1和第二磁头位置x2之间的差来确定每个轨道的磁头的读写器偏移。 第一头位置x1是用于在轨道上写入信息的最佳头部位置，而第二头部位置x2是头部的偏离轨迹能力（OTC）的中点。 OTC是轨道间距的一部分，阅读器期望阅读器读取没有不可避免的位错误的信息，使得写入器到读取器轨迹重合失调（TMR）最小化，因为磁头使读取器 - 写入器偏移以读取写在轨道上的信息或在轨道上写入信息。