公开(公告)号：US20050066227A1

公开(公告)日：2005-03-24

申请号：US10664611

申请日：2003-09-18

申请人： KokHoe Chia ,  Myint Ngwe ,  JinQuan Shen ,  SweeKieong Choo

发明人： KokHoe Chia ,  Myint Ngwe ,  JinQuan Shen ,  SweeKieong Choo

IPC分类号： G06F12/00 ,  G06F12/02 ,  G06F12/08 ,  G06F12/16

CPC分类号： G06F12/023 ,  G06F12/0893

摘要： A buffer random access memory has a first portion reserved for a defect table and a second portion reserved for data caching. A method of managing the buffer random access memory includes determining actual memory space of the first portion which is occupied by the defect table. This identifies unused memory space of the first portion of the buffer random access memory. The method then includes reallocating the unused memory space of the first portion of the buffer random access memory for use in data caching. Controllers and mass storage devices which implement the method are also provided.

摘要翻译： 缓冲随机存取存储器具有为缺陷表保留的第一部分和为数据高速缓存而保留的第二部分。 一种管理缓冲随机存取存储器的方法包括：确定由缺陷表占用的第一部分的实际存储空间。 这标识缓冲器随机存取存储器的第一部分的未使用的存储器空间。 该方法然后包括重新分配用于数据高速缓存的缓冲随机存取存储器的第一部分的未使用的存储器空间。 还提供了实现该方法的控制器和大容量存储设备。

公开(公告)号：US07434019B2

公开(公告)日：2008-10-07

申请号：US10664611

申请日：2003-09-18

申请人： KokHoe Chia ,  Myint Ngwe ,  JinQuan Shen ,  SweeKieong Choo

发明人： KokHoe Chia ,  Myint Ngwe ,  JinQuan Shen ,  SweeKieong Choo

IPC分类号： G06F12/00

CPC分类号： G06F12/023 ,  G06F12/0893

摘要： A buffer random access memory has a first portion reserved for a defect table and a second portion reserved for data caching. A method of managing the buffer random access memory includes determining actual memory space of the first portion which is occupied by the defect table. This identifies unused memory space of the first portion of the buffer random access memory. The method then includes reallocating the unused memory space of the first portion of the buffer random access memory for use in data caching. Controllers and mass storage devices which implement the method are also provided.

摘要翻译： 缓冲随机存取存储器具有为缺陷表保留的第一部分和为数据高速缓存而保留的第二部分。 一种管理缓冲随机存取存储器的方法包括：确定由缺陷表占用的第一部分的实际存储空间。 这标识缓冲器随机存取存储器的第一部分的未使用的存储器空间。 该方法然后包括重新分配用于数据高速缓存的缓冲随机存取存储器的第一部分的未使用的存储器空间。 还提供了实现该方法的控制器和大容量存储设备。

公开(公告)号：US06822814B2

公开(公告)日：2004-11-23

申请号：US09896359

申请日：2001-06-29

申请人： WeiLoon Ng ,  Myint Ngwe ,  QuekLeong Choo ,  EngHock Lim ,  KokHoe Chia ,  CheeWai Lum

发明人： WeiLoon Ng ,  Myint Ngwe ,  QuekLeong Choo ,  EngHock Lim ,  KokHoe Chia ,  CheeWai Lum

IPC分类号： G11B2736

CPC分类号： G11B27/36 ,  G11B5/012 ,  G11B5/59683 ,  G11B21/21 ,  G11B33/10 ,  G11B2005/0016 ,  G11B2220/20

摘要： An apparatus and associated method for detecting head collision with disc media, or other matter, during a write operation is disclosed. The method and apparatus generally monitor the resistance of an MR element on the head in order to detect a temperature increases indicative of a head collision. The resistance can be compared to a pre-selected threshold to generate an output indicative of head collision.

摘要翻译： 公开了一种用于在写入操作期间用于检测与盘介质的头部碰撞或其他事项的装置和相关联的方法。 该方法和装置通常监测磁头上的MR元件的电阻，以便检测指示磁头碰撞的温度升高。 可以将电阻与预先选择的阈值进行比较以产生指示头部碰撞的输出。

公开(公告)号：US06795261B2

公开(公告)日：2004-09-21

申请号：US09893090

申请日：2001-06-27

申请人： KokHoe Chia ,  TeckKhoon Lim ,  CheeWai Lum ,  Myint Ngwe ,  BengWee Quak

发明人： KokHoe Chia ,  TeckKhoon Lim ,  CheeWai Lum ,  Myint Ngwe ,  BengWee Quak

IPC分类号： G11B2736

CPC分类号： G11B5/09 ,  G11B20/1883 ,  G11B27/36 ,  G11B2220/20

摘要： Method and apparatus for increasing process yields of data storage devices which store data on media surfaces using read/write heads. An initial linear bit recording density is determined for each head, the linear bit recording density comprising a density at which each head is capable of writing data to and reading data from the corresponding media surface. Defective storage sectors are identified on the media surfaces to determine whether a sufficient number of logical storage sectors are available to meet a predetermined data storage capacity. The linear bit recording density of at least one of the heads is then altered to ensure that the storage device has sufficient logical storage sectors to meet the predetermined capacity.

摘要翻译： 用于增加使用读/写头在介质表面上存储数据的数据存储设备的处理产量的方法和装置。 对于每个头部确定初始线性位记录密度，线性位记录密度包括每个头部能够将数据写入和从相应介质表面读取数据的密度。 在介质表面上识别不良的存储扇区，以确定足够数量的逻辑存储扇区是否可用于满足预定的数据存储容量。 然后更改至少一个磁头的线性位记录密度，以确保存储设备具有足够的逻辑存储扇区以满足预定容量。

公开(公告)号：US06947232B2

公开(公告)日：2005-09-20

申请号：US10000257

申请日：2001-11-02

申请人： TeckKhoon Lim ,  Myint Ngwe ,  KokHoe Chia

发明人： TeckKhoon Lim ,  Myint Ngwe ,  KokHoe Chia

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/82 ,  G11B20/18 ,  G11B27/36

CPC分类号： G11B5/012 ,  G11B5/00 ,  G11B5/82 ,  G11B20/1816 ,  G11B27/36 ,  G11B2005/001

摘要： Method and apparatus for detecting defects in a magnetic medium of a data handling system. The magnetic medium includes a number of user data wedges each disposed between an adjacent pair of servo data wedges. A predetermined data sequence is written to the user data wedges, and subsequently read to generate a readback signal. A sequence of discrete time sample values are generated from the readback signal. Defects in the medium are detected in relation to the magnitudes of the discrete time samples. A media scan controller outputs a first multi-bit information record having at least one bit composing the address of the user data wedge containing a defect, and a second multi-bit information record having at least one bit composing an address of the defect within the user data wedge. No information is written to the buffer when no defects are identified.

摘要翻译： 一种用于检测数据处理系统的磁介质中的缺陷的方法和装置。 磁介质包括各自设置在相邻的一对伺服数据楔之间的用户数据楔。 将预定的数据序列写入用户数据楔，然后读取以生成回读信号。 从回读信号产生一系列离散时间采样值。 相对于离散时间样本的幅度检测介质中的缺陷。 媒体扫描控制器输出具有构成包含缺陷的用户数据楔的地址的至少一个比特的第一多比特信息记录，以及第二多比特信息记录，其具有至少一个比特，构成该缺陷内的缺陷的地址 用户数据楔。 当没有识别到​​缺陷时，没有信息写入缓冲区。

公开(公告)号：US07738201B2

公开(公告)日：2010-06-15

申请号：US11507063

申请日：2006-08-18

申请人： Ming Jin ,  Hiau Choon Kee ,  Myint Ngwe ,  Liu Li

发明人： Ming Jin ,  Hiau Choon Kee ,  Myint Ngwe ,  Liu Li

IPC分类号： G11B5/09 ,  G11B20/10

CPC分类号： G11B20/18 ,  G11B20/10296 ,  G11B2020/183 ,  G11B2220/2516

摘要： In general, this disclosure describes read recovery techniques for data storage devices that use soft information associated with multiple read operations to detect data. Specifically, the read recovery techniques comprise computing soft information for each bit detected during a first read operation of a data storage medium, computing soft information for each bit detected during a second read operation of the data storage medium and averaging the soft information computed during the first and second read operations to determine the value of each of the bits.

摘要翻译： 通常，本公开描述了使用与多个读取操作相关联的软信息来检测数据的数据存储设备的读取恢复技术。 具体地，读取恢复技术包括计算在数据存储介质的第一次读取操作期间检测到的每个位的软信息，计算在数据存储介质的第二次读取操作期间检测到的每个位的软信息，并对在 第一和第二读取操作来确定每个位的值。

公开(公告)号：US07397398B2

公开(公告)日：2008-07-08

申请号：US11431122

申请日：2006-05-09

申请人： Ming Jin ,  Hiauchoon Kee ,  Zhenyu Sun ,  Liu Li ,  Myint Ngwe

发明人： Ming Jin ,  Hiauchoon Kee ,  Zhenyu Sun ,  Liu Li ,  Myint Ngwe

IPC分类号： H03M7/00

CPC分类号： H03M5/145 ,  G11B20/1426 ,  G11B2220/2516

摘要： A data word is error correction encoded to provide a worst case codeword without bit transitions between worst case codeword bits. A modulation bit is calculated as a function of the worst case codeword. The modulation bit has a bit polarity opposite a bit polarity of the worst case codeword bits. The worst case codeword bits are added with the modulation bit to form a modulated code word.

摘要翻译： 对数据字进行纠错编码，以提供最坏情况码字，而不会在最差情况码字位之间进行位转换。 作为最差情况码字的函数计算调制比特。 调制位具有与最坏情况码字位的位极性相反的位极性。 最差情况下，码字比特与调制比特相加以形成调制码字。

公开(公告)号：US06952321B1

公开(公告)日：2005-10-04

申请号：US10119985

申请日：2002-04-10

申请人： EngHock Lim ,  BengTheam Ko ,  Jun Wang ,  MingYou Hu ,  Myint Ngwe

发明人： EngHock Lim ,  BengTheam Ko ,  Jun Wang ,  MingYou Hu ,  Myint Ngwe

IPC分类号： G11B5/596 ,  G11B21/02

CPC分类号： G11B5/59627

摘要： A method of determining run-out in a disc drive involving steps of performing a direct current erase, selecting a reference track, writing a sinusoidal signal into a first track at a first offset from the reference track, sensing a read signal along the reference track, and analyzing the read signal to extract run-out information.

摘要翻译： 一种确定磁盘驱动器中的耗尽的方法，包括执行直流擦除，选择参考磁道，在与参考磁道的第一偏移处将第一磁道写入正弦信号的步骤，沿着参考磁道感测读取信号 ，并分析读取信号以提取耗尽信息。

公开(公告)号：US06839193B2

公开(公告)日：2005-01-04

申请号：US10016341

申请日：2001-12-11

申请人： Fong Kheon Chong ,  Quek Leong Choo ,  Myint Ngwe ,  Jun Wang ,  Kah Liang Gan

发明人： Fong Kheon Chong ,  Quek Leong Choo ,  Myint Ngwe ,  Jun Wang ,  Kah Liang Gan

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/455 ,  G11B5/48 ,  G11B5/596 ,  G11B20/18 ,  G11B27/36 ,  G11B5/09

CPC分类号： G11B5/012 ,  G11B5/455 ,  G11B5/4886 ,  G11B5/59627 ,  G11B20/10481 ,  G11B20/1816 ,  G11B27/36 ,  G11B2005/0016 ,  G11B2220/20

摘要： A method for optimizing the read-to-write offset of a disk drive system in respect of a track is provided. In one aspect the method includes the step of determining a first read position amongst a range of test positions offset relative to the track on the basis of read signal strength. The method further includes the steps of calculating a subrange of test positions about the first read position, selecting a second read position from the subrange on the basis of bit error rates and setting the read-to-write offset as a function of the second read position. In addition a disk drive system including means for optimally setting the read-to-write offset in respect of a track is provided.

公开(公告)号：US06731442B2

公开(公告)日：2004-05-04

申请号：US10066231

申请日：2002-01-31

申请人： Ming Jin ,  Myint Ngwe ,  David Loh ,  Quek Leong Choo ,  Mingyou Hu

发明人： Ming Jin ,  Myint Ngwe ,  David Loh ,  Quek Leong Choo ,  Mingyou Hu

IPC分类号： G11B2736

CPC分类号： G11B20/1883 ,  G11B20/182

摘要： A method is disclosed for detecting defects in a recordable medium such as a hard disc drive based on error energy. The method may include the steps of writing test data to the medium and reading back the test data. The method may also include the steps of computing an error energy based on the square of the difference between the read back data and an ideal version of the test data and comparing the error energy with an energy threshold. The method generates a defect signal when the error energy exceeds the energy threshold. The method may also be used to identify the media defect according to its error energy profile. An apparatus for detecting defects in a recordable medium is also disclosed.

摘要翻译： 公开了一种用于基于误差能量来检测诸如硬盘驱动器的可记录介质中的缺陷的方法。 该方法可以包括将测试数据写入介质并读回测试数据的步骤。 该方法还可以包括以下步骤：基于回读数据和测试数据的理想版本之间的差的平方来计算误差能量，并将误差能量与能量阈值进行比较。 当误差能量超过能量阈值时，该方法产生缺陷信号。 该方法还可以用于根据其误差能量分布来识别介质缺陷。 还公开了一种用于检测可记录介质中的缺陷的装置。