公开(公告)号：US06560052B2

公开(公告)日：2003-05-06

申请号：US09351737

申请日：1999-07-12

申请人： Wei Loon Ng ,  Beng Wee Quak ,  Wing Hung Chan ,  Swee Kieong Choo ,  Choon Wei Ng ,  Teck Khoon Lim

发明人： Wei Loon Ng ,  Beng Wee Quak ,  Wing Hung Chan ,  Swee Kieong Choo ,  Choon Wei Ng ,  Teck Khoon Lim

IPC分类号： G11B509

CPC分类号： G11B20/1258 ,  G11B5/012 ,  G11B5/09 ,  G11B20/1816 ,  G11B27/105 ,  G11B2005/001 ,  G11B2220/20 ,  G11B2220/2516

摘要： The present invention pertains to an apparatus and method for recording data in a variable bit density disc drive. The disc drive includes a recording surfaces, each having a corresponding head for recording data on the recording surface. At least one head is operated at a different recording frequency from the other heads, creating a variable bit density for the different recording surfaces. The combination of head recording frequencies is determined following an error testing operation and a unique physdisc lookup table is created based on the determined recording frequencies. The physdisc lookup table is used to allocate data sectors and to convert between logical and physical block addresses.

摘要翻译： 本发明涉及一种用于在可变位密度盘驱动器中记录数据的装置和方法。 盘驱动器包括记录表面，每个记录表面具有用于在记录表面上记录数据的相应头部。 至少一个头部以与其他头部不同的记录频率操作，为不同的记录表面创建可变位密度。 头部记录频率的组合在​​误差测试操作之后确定，并且基于所确定的记录频率创建唯一的物理查找表。 physdisc查找表用于分配数据扇区，并在逻辑块和物理块地址之间进行转换。

公开(公告)号：US06445653B1

公开(公告)日：2002-09-03

申请号：US09714025

申请日：2000-11-15

申请人： Wei Loon Ng ,  Teck Khoon Lim ,  Beng Wee Quak ,  Wing Hung Chan ,  Myint Ngwe

发明人： Wei Loon Ng ,  Teck Khoon Lim ,  Beng Wee Quak ,  Wing Hung Chan ,  Myint Ngwe

IPC分类号： G11B700

CPC分类号： G11B27/105 ,  G11B5/012 ,  G11B20/10 ,  G11B2005/001 ,  G11B2220/20 ,  G11B2220/2516

摘要： The present invention pertains to an apparatus and method for recording data in a data storage medium. The data storage medium includes a number of discs, each having at least one recording surface. Each recording surface is associated with a read/write head that records and accesses data from the surface. Each recording surface is partitioned into a number of zones. Each zone is vertically aligned with a same zone on each surface of each disc. The zone boundaries on all surfaces of the disc drive are the same. The recording frequency for each zone on all surfaces can differ for each read/write head in order to compensate for a read/write head that cannot meet the BPI error rate threshold.

摘要翻译： 本发明涉及用于在数据存储介质中记录数据的装置和方法。 数据存储介质包括多个盘，每个盘具有至少一个记录表面。 每个记录表面与记录和访问来自表面的数据的读/写头相关联。 每个记录表面被划分成多个区域。 每个区域与每个盘的每个表面上的相同区域垂直对准。 磁盘驱动器的所有表面上的区域边界是相同的。 所有表面上的每个区域的记录频率对于每个读/写头可能不同，以补偿不能满足BPI错误率阈值的读/写头。

公开(公告)号：US06182250B2

公开(公告)日：2001-01-30

申请号：US09167808

申请日：1998-10-07

申请人： Wei Loon Ng ,  Teck Khoon Lim ,  Beng Wee Quak ,  Wing Hung Chan ,  Myint Ngwe

发明人： Wei Loon Ng ,  Teck Khoon Lim ,  Beng Wee Quak ,  Wing Hung Chan ,  Myint Ngwe

IPC分类号： G06F1100

CPC分类号： G11B27/105 ,  G11B5/012 ,  G11B20/10 ,  G11B2005/001 ,  G11B2220/20 ,  G11B2220/2516

摘要： The present invention pertains to an apparatus and method for recording data in a data storage medium. The data storage medium includes a number of discs, each having at least one recording surface. Each recording surface is associated with a read/write head that records and accesses data from the surface. Each recording surface is partitioned into a number of zones. Each zone is vertically aligned with a same zone on each surface of each disc. The zone boundaries on all surfaces of the disc drive are the same. The recording frequency for each zone on all surfaces can differ for each read/write head in order to compensate for a read/write head that cannot meet the BPI error rate threshold.

摘要翻译： 本发明涉及用于在数据存储介质中记录数据的装置和方法。 数据存储介质包括多个盘，每个盘具有至少一个记录表面。 每个记录表面与记录和访问来自表面的数据的读/写头相关联。 每个记录表面被划分成多个区域。 每个区域与每个盘的每个表面上的相同区域垂直对准。 磁盘驱动器的所有表面上的区域边界是相同的。 所有表面上的每个区域的记录频率对于每个读/写头可能不同，以补偿不能满足BPI错误率阈值的读/写头。

公开(公告)号：US06747825B1

公开(公告)日：2004-06-08

申请号：US09578235

申请日：2000-05-24

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

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

IPC分类号： G11B509

CPC分类号： G11B20/1883 ,  G11B5/09 ,  G11B5/59616 ,  G11B2220/20

摘要： A disc drive includes a base and a disc rotatably attached to the base. The disc drive is formatted by obtaining a list of defective sector entries, determining a first location of selected information based on skipping the defective sectors within the list of defective sector entries, and calculating a second location for selected information. At least one sector to skip is added before the second location of selected information to move the selected information from the first position to the second position. The added sectors may be designated as defective sectors. By adding the at least one sector to skip, the second position of the information is moved or slipped.

摘要翻译： 盘驱动器包括基座和可旋转地附接到基座的盘。 通过获得缺陷扇区条目的列表来格式化盘驱动器，基于跳过缺陷扇区条目列表内的缺陷扇区，以及计算选定信息的第二位置，确定选定信息的第一位置。 在所选择的信息的第二位置之前添加至少一个要跳过的扇区，以将选择的信息从第一位置移动到第二位置。 添加的扇区可以被指定为缺陷扇区。 通过添加要跳过的至少一个扇区，信息的第二位置被移动或滑动。

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：US06967807B2

公开(公告)日：2005-11-22

申请号：US10642909

申请日：2003-08-18

申请人： Chris Thomas Settje ,  David Louis Schell ,  Daniel Eugene Hobson ,  Teck Khoon Lim ,  Patrick TaiHeng Wong ,  Beng Wee Quak ,  Ming Zhong Ding ,  Soon Wah Leow

发明人： Chris Thomas Settje ,  David Louis Schell ,  Daniel Eugene Hobson ,  Teck Khoon Lim ,  Patrick TaiHeng Wong ,  Beng Wee Quak ,  Ming Zhong Ding ,  Soon Wah Leow

IPC分类号： G11B5/55 ,  G11B5/596 ,  G11B15/12

CPC分类号： G11B5/59627 ,  G11B5/5526

摘要： An apparatus and method for selecting physical cylinders (cylinders accessible for read/write operations) in a disc drive is provided. The disc drive includes at least one rotatable disc. The disc drive also includes a first head, which is positionable adjacent a first disc surface, and a second head, which is positionable adjacent a second disc surface. The first disc surface has a first plurality of greycode tracks and the second disc surface has a second plurality of greycode tracks. Each greycode track of the second plurality of greycode tracks corresponds to a different greycode track of the first plurality of greycode tracks, thereby forming a plurality of greycode cylinders, with each greycode cylinder of the plurality of greycode cylinders including a pair of corresponding greycode tracks. The physical cylinders are a subset (less than all) of the plurality of the greycode cylinders. The method of selecting the physical cylinders includes determining whether the first plurality of greycode tracks or the second plurality of greycode tracks demonstrates greater track eccentricity, to thereby obtain a maximum track eccentricity surface and a corresponding maximum eccentricity head. The maximum track eccentricity surface is one of the first and second disc surfaces and the maximum eccentricity head is a corresponding one of the first and second heads. The maximum eccentricity head is used to locate at least one of the physical cylinders.

摘要翻译： 提供了一种用于选择盘驱动器中的物理气缸（用于读/写操作可读取的气缸）的装置和方法。 盘驱动器包括至少一个可旋转盘。 盘驱动器还包括可邻近第一盘表面定位的第一头和可邻近第二盘表面定位的第二头。 第一盘表面具有第一多个灰色轨道，第二盘表面具有第二多个灰色轨迹。 第二多个灰色轨道的每个灰度轨道对应于第一多个灰色轨迹的不同的灰度轨道，从而形成多个灰色圆柱体，其中多个灰色圆柱体的每个灰度圆柱体包括一对相应的灰度轨道。 物理气缸是多个气缸中的子集（小于全部）。 选择物理气缸的方法包括确定第一多个灰色轨道或第二多个灰色轨道是否表现出更大的轨道偏心度，从而获得最大轨道偏心面和相应的最大偏心头。 最大轨道偏心面是第一和第二盘表面之一，最大偏心头是第一和第二磁头中相应的一个。 最大偏心头用于定位至少一个物理气缸。

公开(公告)号：US06446156B1

公开(公告)日：2002-09-03

申请号：US09475530

申请日：1999-12-30

申请人： Kok Hoe Chia ,  Teck Khoon Lim ,  Beng Wee Quak ,  Kok Seng Lim ,  Song Wee Teo

发明人： Kok Hoe Chia ,  Teck Khoon Lim ,  Beng Wee Quak ,  Kok Seng Lim ,  Song Wee Teo

IPC分类号： G06F1200

CPC分类号： G11B5/455 ,  G11B5/012 ,  G11B5/09 ,  G11B20/1816 ,  G11B27/36 ,  G11B2005/001 ,  G11B2220/20

摘要： A disc drive production process automatically configures the disc drive to a suitable capacity based upon the data transfer capability of each of the head/disc surface combinations in the drive. The error rate of each of the head/disc surface combinations is determined as a function of the bit density of the disc surface. Based on the data transfer capability of the head/disc surface combinations, one of three drive configuration schemes is selected. A variable BPI (bits per inch) scheme reduces the data rate of a weak head/disc surface combination while increasing the data rate of a strong head/disc surface combination. If the drive contains one very weak head/disc surface combination, a head depopulation scheme disables the very weak head. If the drive contains two or more very weak heads, a de-frequency scheme reduces the overall capacity of the drive.

摘要翻译： 基于驱动器中的每个磁头/磁盘表面组合的数据传输能力，磁盘驱动器生产过程自动地将磁盘驱动器配置为合适的容量。 根据盘表面的位密度确定每个头/盘表面组合的误差率。 基于头/盘表面组合的数据传输能力，选择三种驱动器配置方案之一。 可变BPI（每英寸位数）方案降低了弱磁头/磁盘表面组合的数据速率，同时增加了强磁头/磁盘表面组合的数据速率。 如果驱动器包含一个非常弱的头/盘表面组合，则头部排泄方案会禁用非常弱的头部。 如果驱动器包含两个或多个非常弱的磁头，则去频方案会降低驱动器的总体容量。

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：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。