公开(公告)号：US06751036B2

公开(公告)日：2004-06-15

申请号：US09902428

申请日：2001-07-10

申请人： Beng Wee Quak ,  KokHoe Chia ,  Kwee Teck Say ,  KianKeong Ooi ,  Soon Wah Leow ,  Song Wee Teo

发明人： Beng Wee Quak ,  KokHoe Chia ,  Kwee Teck Say ,  KianKeong Ooi ,  Soon Wah Leow ,  Song Wee Teo

IPC分类号： G11B509

CPC分类号： G11B27/36 ,  G11B5/012 ,  G11B20/1816 ,  G11B33/10 ,  G11B2005/001 ,  G11B2005/0013 ,  G11B2220/20

摘要： A data storage device has a plurality of head/surface combinations with different data track densities on at least two surfaces. A minimum head quality is established for the data storage apparatus. Head quality is identified for each of the heads at each of a plurality of track densities. A tuned track density is selected for each surface based on the track density that corresponds to a head quality.

摘要翻译： 数据存储装置具有在至少两个表面上具有不同数据磁道密度的多个头/表面组合。 为数据存储装置建立最小的头部质量。 在多个磁道密度中的每一个处识别每个磁头的磁头质量。 基于对应于头部质量的轨道密度，为每个表面选择调谐轨道密度。

公开(公告)号：US06725330B1

公开(公告)日：2004-04-20

申请号：US09649106

申请日：2000-08-25

申请人： Patrick Tai Heng Wong ,  Beng Wee Quak ,  YongPeng Chng ,  Wesley Wing Hung Chan ,  WeiLoon Ng

发明人： Patrick Tai Heng Wong ,  Beng Wee Quak ,  YongPeng Chng ,  Wesley Wing Hung Chan ,  WeiLoon Ng

IPC分类号： G06F1200

CPC分类号： G06F12/0866

摘要： According to one embodiment of the present invention a disc controller in a disc drive includes a cache memory and a control circuit. The control circuit is configured to identify an operating system of a host computer coupled to the disc drive, select a segmentation level for the cache memory based on the identified operating system, and store information in the cache memory according to the segmentation level. According to another embodiment of the present invention a cache memory in a disc drive is operated by identifying an operating system of a host computer coupled to the disc drive, selecting a segmentation level for the cache memory based on the identified operating system, and storing information in the cache memory according to the segmentation level. The operating system is identified by reading a partition type from a master boot record stored in a disc in the disc drive.

摘要翻译： 根据本发明的一个实施例，盘驱动器中的盘控制器包括高速缓冲存储器和控制电路。 控制电路被配置为识别耦合到盘驱动器的主计算机的操作系统，基于所识别的操作系统选择高速缓存存储器的分段级别，并根据分段级别将信息存储在高速缓冲存储器中。 根据本发明的另一实施例，盘驱动器中的高速缓冲存储器通过识别耦合到盘驱动器的主计算机的操作系统来操作，基于所识别的操作系统选择高速缓冲存储器的分段级别，并且存储信息 在高速缓冲存储器中根据分段级别。 通过从存储在盘驱动器中的盘中的主引导记录读取分区类型来识别操作系统。

公开(公告)号：US06690532B1

公开(公告)日：2004-02-10

申请号：US09539796

申请日：2000-03-31

申请人： Swee Kieong Choo ,  Jack Ming Teng ,  Hwee Peng Teo ,  Myint Ngwe ,  Beng Wee Quak ,  Kwee Teck Say

发明人： Swee Kieong Choo ,  Jack Ming Teng ,  Hwee Peng Teo ,  Myint Ngwe ,  Beng Wee Quak ,  Kwee Teck Say

IPC分类号： G11B2102

CPC分类号： G11B5/012 ,  G11B5/02

摘要： A method and apparatus for detecting and recovering from head instability in a magneto-resistive (MR) transducer head of a disc-drive system. A head-instability-recovery circuit is described for use in disc drive to recover from a head-instability condition of an MR transducer head. This circuit includes a controller and a current source that supplies current to the MR head. The current source is controlled to supply a nominal amount of current to the MR head when operating in a normal mode, and to supply one or more current bursts having a current above the nominal supply current in order to recover from the head-instability condition. Also described is a method for recovering from a transducer-instability condition of an MR transducer of a disc drive, including detecting a situation that indicates a head-instability-recovery operation is desired, and performing the head-instability-recovery operation.

摘要翻译： 一种用于在盘驱动系统的磁阻（MR）换能器头中的头部不稳定性中检测和恢复的方法和装置。 描述磁头不稳定性恢复电路用于磁盘驱动器以从MR换能器头的磁头不稳定状态恢复。 该电路包括向MR磁头供应电流的控制器和电流源。 控制电流源以在正常模式下工作时向MR磁头提供额定电流量，并且提供具有高于额定电源电流的电流的一个或多个电流脉冲串，以便从头部不稳定状态恢复。 还描述了一种用于从盘驱动器的MR换能器的换能器不稳定状态恢复的方法，其包括检测指示头部不稳定性恢复操作期望的情况，以及执行头部不稳定性恢复操作。

公开(公告)号：US06512647B1

公开(公告)日：2003-01-28

申请号：US09550370

申请日：2000-04-14

申请人： Beng Wee Quak ,  Bernard Tuang Liang Lim ,  Myint Ngwe ,  Song Wee Teo ,  Beng Theam Ko

发明人： Beng Wee Quak ,  Bernard Tuang Liang Lim ,  Myint Ngwe ,  Song Wee Teo ,  Beng Theam Ko

IPC分类号： G11B503

CPC分类号： G11B20/10 ,  G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B2005/0018

摘要： A bias current for a magnetoresistive read head is selected by defining a tuning range based on a maximum and a minimum bias current value for the head. A plurality of read operations are iteratively performed using a different bias current value over the tuning range for each iteration. The results of each read iteration are measured and a bias current is selected on the basis of the read error rates, and particularly those bias currents associated with the lowest read error rate.

摘要翻译： 通过基于磁头的最大和最小偏置电流值定义调谐范围来选择磁阻读取头的偏置电流。 在每个迭代的调谐范围内使用不同的偏置电流值迭代地执行多个读取操作。 测量每个读取迭代的结果，并且基于读取错误率选择偏置电流，特别是与最低读取错误率相关联的那些偏置电流。

公开(公告)号：US06324890B1

公开(公告)日：2001-12-04

申请号：US09584563

申请日：2000-05-31

申请人： Ricky Wei Watt Yeo ,  KianKeong Ooi ,  Louis Seng Hong Pang ,  MingZhong Ding ,  YangQuan Chen ,  Beng Wee Quak

发明人： Ricky Wei Watt Yeo ,  KianKeong Ooi ,  Louis Seng Hong Pang ,  MingZhong Ding ,  YangQuan Chen ,  Beng Wee Quak

IPC分类号： G01N3312

CPC分类号： G01N19/02

摘要： A method of characterizing and screening a disc drive based on a voice coil motor pivot friction developed during a low velocity seek operation consists of determining estimated drive level bias values required by the voice coil motor to move an actuator arm assembly during a fast seek, then determining a low velocity drive level bias values required by the voice coil motor to move an actuator arm assembly during a slow seek, then computing a difference between the estimate drive level bias values and the low velocity drive level bias values, then determining a hit counter value based on comparing the computed difference with a predetermined threshold value, and then characterizing the disc drive based on the hit counter value.

摘要翻译： 基于在低速搜索操作期间产生的音圈电动机枢转摩擦来表征和筛选磁盘驱动器的方法包括确定音圈电机在快速寻找期间移动致动器臂组件所需的估计的驱动电平偏置值，然后 确定音速电动机在慢速寻找期间移动致动器臂组件所需的低速驱动电平偏置值，然后计算估计驱动电平偏置值和低速驱动电平偏置值之间的差，然后确定命中计数器 基于计算出的差异与预定阈值进行比较，然后基于命中计数器值表征盘驱动器的值。

公开(公告)号：US06188531B1

公开(公告)日：2001-02-13

申请号：US09070271

申请日：1998-04-30

申请人： James Lai Kein Chang ,  Myint Ngwe ,  Kah Liang Gan ,  Beng Wee Quak

发明人： James Lai Kein Chang ,  Myint Ngwe ,  Kah Liang Gan ,  Beng Wee Quak

IPC分类号： G11B509

CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035

摘要： A system, method, and device for sensing temperature during the writing of information onto magnetic media and providing a sufficient write current for that temperature is disclosed. The system comprises a head responsive to a write current for generating a magnetic flux used in writing data onto the magnetic media, a write current source coupled to the head for receiving a write signal and providing write current to the head, and a temperature responsive device coupled to the write current source that senses temperature and provides a write signal whose magnitude is dependent on temperature.

摘要翻译： 公开了一种用于在将信息写入磁介质并为该温度提供足够的写入电流期间感测温度的系统，方法和装置。 该系统包括响应于写入电流的磁头，用于产生用于将数据写入到磁性介质上的磁通量;耦合到磁头的写入电流源，用于接收写入信号并向磁头提供写入电流;以及温度响应装置 耦合到感应温度的写入电流源，并提供其幅度取决于温度的写入信号。

公开(公告)号：US06724562B1

公开(公告)日：2004-04-20

申请号：US09538535

申请日：2000-03-30

申请人： Chiap Heok Ang ,  Niroot Jierapipatanakul ,  Beng Theam Ko ,  Myint Ngwe ,  Beng Wee Quak ,  Choonkiat Lim

发明人： Chiap Heok Ang ,  Niroot Jierapipatanakul ,  Beng Theam Ko ,  Myint Ngwe ,  Beng Wee Quak ,  Choonkiat Lim

IPC分类号： G11B5596

CPC分类号： G11B5/59633

摘要： A method for writing servo patterns on at least one disc in a disc drive that has a first set of tracks and a second set of tracks on a major surface of the disc includes stepping between the tracks of the first set of tracks at a first constant angle, and stepping between the tracks of the second set of tracks at a second constant angle. Stepping between tracks in the first group or the second group includes selecting two adjacent tracks from either the first group of tracks or the second group of tracks, and determining the angle through which an actuator assembly must be rotated between the two adjacent tracks selected to produce a selected track pitch. The method produces a disc for a disc drive with a first set of tracks, and a second set of tracks in which the track pitch varies across the set of tracks.

摘要翻译： 一种用于在盘驱动器中的至少一个盘上写入伺服图案的方法，所述盘驱动器具有第一组轨道，并且在所述盘的主表面上的第二组轨道包括在所述第一组轨道的轨道之间以第一常数 角度，并以第二恒定角度在第二组轨道的轨迹之间进行步进。 在第一组或第二组中的轨道之间的步进包括从第一组轨道或第二组轨道中选择两个相邻的轨道，并且确定致动器组件必须在被选择产生的两个相邻轨道之间旋转的角度 选定的音高。 该方法产生用于具有第一组轨道的盘驱动器的盘，以及轨道间距在该组轨道上变化的第二组轨道。

公开(公告)号：US06704159B2

公开(公告)日：2004-03-09

申请号：US09810337

申请日：2001-03-16

申请人： MingZhong Ding ,  KianKeong Ooi ,  YangQuan Chen ,  Jack Ming Teng ,  ShuangQuan Min ,  Beng Wee Quak

发明人： MingZhong Ding ,  KianKeong Ooi ,  YangQuan Chen ,  Jack Ming Teng ,  ShuangQuan Min ,  Beng Wee Quak

IPC分类号： G11B5596

CPC分类号： G11B21/02 ,  G11B19/28

摘要： A method of implementing an automatic acoustic management feature for a disc drive includes receiving an acoustic/performance compromising factor from a host, tuning disc drive performance by applying the factor to a control parameter to generate a modified control parameter, and executing a loop for controlling a disc drive operation using the modified control parameter. In another embodiment, a disc drive has a base, a rotatable disc, an actuator assembly with an arm for carrying a head in transducing relation to the disc in response to a control signal, a receiver for receiving an acoustic/performance compromising factor, and a controller that monitors the position of the arm and generates the control signal. The controller executes a seeking control loop having a control parameter modified by applying a compromising factor to the parameter to tune the acoustic performance of the drive.

摘要翻译： 实现用于盘驱动器的自动声学管理特征的方法包括从主机接收声学/性能损害因子，通过将因子应用于控制参数来产生修改的控制参数来调谐盘驱动器性能，以及执行用于控制的循环 使用修改的控制参数的盘驱动器操作。 在另一个实施例中，盘驱动器具有底座，可旋转盘，具有臂的致动器组件，用于响应于控制信号而承载头与盘转换的关系，接收器用于接收声学/性能损害因子，以及 监控臂的位置并产生控制信号的控制器。 控制器执行寻道控制回路，其具有通过对参数应用折中因子而修正的控制参数，以调节驱动器的声学性能。

公开(公告)号：US06564292B2

公开(公告)日：2003-05-13

申请号：US09903353

申请日：2001-07-11

申请人： Ng Wei Loon ,  Ying Ee Yip ,  Beng Wee Quak

发明人： Ng Wei Loon ,  Ying Ee Yip ,  Beng Wee Quak

IPC分类号： G06F1200

CPC分类号： H04N21/2312 ,  G06F3/0613 ,  G06F3/0656 ,  G06F3/0676 ,  G11B20/10527 ,  H04N21/232 ,  H04N21/23406 ,  H04N21/44004

摘要： Audio or video information is stored as data files in clusters or blocks of sectors on a magnetic disc. The data files are transferred from the disc drive to one or more buffers for respective data streaming applications. Optimal buffer size is calculated using operational parameters such as transfer rates and rotational latencies. The sectors are grouped in blocks having a size equivalent to, or slightly larger than, the size of an associated host buffer for the respective application to avoid fragmentation of the data used in each buffer fill, and thereby minimize the time required to fill the buffer from the disc drive.

摘要翻译： 音频或视频信息作为数据文件存储在磁盘上的扇区或块中。 数据文件从磁盘驱动器传送到用于相应数据流应用的一个或多个缓冲器。 使用诸如传输速率和旋转延迟之类的操作参数来计算最佳缓冲器大小。 这些扇区被分组成具有等于或稍大于相应应用的相关联的主机缓冲器的大小的大小的块，以避免在每个缓冲器填充中使用的数据的分段，从而最小化填充缓冲器所需的时间 从磁盘驱动器。

公开(公告)号：US06288867B1

公开(公告)日：2001-09-11

申请号：US09246330

申请日：1999-02-09

申请人： Niroot Jierapipatanakul ,  Michael Joo Chiang Toh ,  Beng Wee Quak ,  Chee Suan Low

发明人： Niroot Jierapipatanakul ,  Michael Joo Chiang Toh ,  Beng Wee Quak ,  Chee Suan Low

IPC分类号： G11B1708

CPC分类号： G11B17/02 ,  G11B17/038

摘要： An information handling system, such as a disc drive, including a base, a disc stack rotatably attached to the base, and an actuator assembly movably attached to the base. The disc stack assembly includes a spindle hub rotatably coupled to the disc drive. The spindle hub has an axis of rotation about which the disc stack assembly rotates. The spindle hub includes a cylindrical portion. The disc stack assembly also includes a clamp, a disc spacer, and a disc coupled to a spindle hub. The disc spacer has an opening therein dimensioned to receive the cylindrical portion of the spindle hub. The disc spacer is asymmetrical and positioned to counter balance a mass offset in the disc stack assembly. The asymmetrical disc spacer also includes a registration surface. The registration surface is on the outer perimeter of the disc spacer. The disc spacer has a center of mass offset from the axial centerline of the opening. The disc spacer is used to counter the center of mass offset of the disc stack assembly. Typically, balancing the disc stack assembly requires that the center of mass of the spacer is on one side of the axis of rotation of the hub and the center of mass of the disc stack assembly is on the other side of the axis of rotation of the hub. The flat surface of the asymmetrical disc spacer is positioned so the plane of the flat surface intersects a plane defined by the axial centerline of the disc stack assembly and a point associated with the mass offset of the disc assembly.

摘要翻译： 诸如盘驱动器的信息处理系统，包括基座，可旋转地附接到基座的盘堆叠以及可移动地附接到基座的致动器组件。 盘堆组件包括可旋转地联接到盘驱动器的主轴毂。 主轴毂具有旋转轴线，盘组件组件围绕其旋转。 主轴毂包括圆柱形部分。 盘堆叠组件还包括夹具，盘形间隔件和联接到主轴毂的盘。 盘形间隔件具有开口，其尺寸设置成容纳主轴毂的圆柱形部分。 盘形间隔物是不对称的并且定位成抵消盘堆叠组件中的质量偏移。 不对称盘片垫片还包括配准表面。 配准表面位于盘间隔件的外周。 盘形间隔件的质心偏离开口的轴线中心线。 盘片用于抵抗盘片组件的质心偏移。 通常，平衡盘堆组件要求间隔件的质心位于轮毂的旋转轴线的一侧，并且盘堆组件的质心位于旋转轴的另一侧上 枢纽。 非对称盘形间隔件的平坦表面被定位成使得平坦表面的平面与由盘堆叠组件的轴向中心线限定的平面和与盘组件的质量偏移相关联的点相交。