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：US06757127B1

公开(公告)日：2004-06-29

申请号：US09648869

申请日：2000-08-25

申请人： Jack Ming Teng ,  Kian Keong Ooi ,  Ming Zhong Ding ,  Wing Kong Chiang ,  Louis Seng Hong Pang ,  Beng Wee Quak

发明人： Jack Ming Teng ,  Kian Keong Ooi ,  Ming Zhong Ding ,  Wing Kong Chiang ,  Louis Seng Hong Pang ,  Beng Wee Quak

IPC分类号： G11B5596

CPC分类号： G11B5/54

摘要： An information handling system, such as a disc drive, includes a base, a disc stack rotatably attached to the base, and an actuator assembly movably attached to the base. A region of the disc stack is identified as a parking band, and when power is not provided to the disc drive, the actuator assembly is held in a parked position within the parking band by an actuator latch. The actuator latch and actuator assembly have different resonant frequencies based on several environmental elements near the actuator assembly, including the temperature of the environment in the disc enclosure. The actuator assembly is unlatched by measuring the environmental element near the actuator assembly and applying an alternating current to a voice coil coupled to the actuator. The frequency of the alternating current applied to the actuator assembly during the unlatching procedure is near the resonant frequency of the actuator assembly in the measured environment.

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叠和可移动地附接到基座的致动器组件。 盘片堆叠的区域被识别为停车带，并且当没有向盘驱动器提供动力时，致动器组件通过致动器闩锁保持在停车带内的停放位置。 致动器闩锁和致动器组件基于致动器组件附近的几个环境元件具有不同的谐振频率，包括盘盒中的环境温度。 致动器组件通过测量致动器组件附近的环境元件并将交流电流施加到耦合到致动器的音圈来解锁。 在解锁过程中施加到致动器组件的交流电的频率接近测量环境中的致动器组件的谐振频率。

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：US06252364B1

公开(公告)日：2001-06-26

申请号：US09401105

申请日：1999-09-22

申请人： Wing Kong Chiang ,  Kian Keong Ooi ,  Ricky Wei Watt Yeo ,  Jack Ming Teng ,  Choon Kiat Lim

发明人： Wing Kong Chiang ,  Kian Keong Ooi ,  Ricky Wei Watt Yeo ,  Jack Ming Teng ,  Choon Kiat Lim

IPC分类号： H02P700

CPC分类号： G11B5/54 ,  G11B21/22 ,  H02P25/034

摘要： A method and apparatus for releasing an actuator from a latched position. A voice coil motor is operably coupled to the actuator which is held by a latch in a latched position. The voice coil motor is provided with a first current signal of increasing magnitude alternating with a second current signal out of phase with the first current signal. The first current signal causes the voice coil motor to urge the actuator away from the latched position, and the second current signal causes the voice coil motor to urge the actuator towards the latched position.

摘要翻译： 一种用于从锁定位置释放致动器的方法和装置。 音圈电动机可操作地联接到致动器，该致动器由闩锁保持在锁定位置。 音圈电机具有与第一电流信号异相的第二电流信号交替增加的第一电流信号。 第一电流信号使得音圈电机将致动器推离锁定位置，并且第二电流信号使音圈电机将致动器推向锁定位置。

公开(公告)号：US5710677A

公开(公告)日：1998-01-20

申请号：US575414

申请日：1995-12-18

申请人： Jack Ming Teng ,  Peng Yeong Loh

发明人： Jack Ming Teng ,  Peng Yeong Loh

IPC分类号： G11B5/596 ,  G11B21/10 ,  G11B27/36

CPC分类号： G11B5/59655 ,  G11B27/36

摘要： A method to accurately determine a defective servo burst written on a recording medium having plurality of tracks, each track containing plurality of position data portions. The position data portions include servo bursts capable of providing position error information, which can be selectively retrieved by a servo control system having a servo gate enabling signal. A first likely defective servo burst is identified by reading each servo burst, measuring corresponding position error information and comparing to a range of acceptable position error information. While disabling retrieval from the first likely defective servo burst, the position error information of plurality of servo bursts occurring after the first likely defective servo burst is measured. If the measured values are within the acceptable range, the first likely defective servo burst is concluded as the first confirmed defective servo burst. If not, plurality of servo bursts occurring prior to the first likely defective servo burst are selectively disabled and subsequent servo bursts are measured until a skipped servo burst is concluded as a first confirmed defective servo burst. While disabling retrieval from first confirmed defective servo burst, subsequent servo bursts are measured to find a second likely defective servo burst. By selectively disabling retrieval of second likely defective servo burst and plurality of servo bursts prior to second likely defective servo burst, a second confirmed defective servo burst is also determined. Then the first confirmed defective servo burst and second confirmed defective servo bursts are permanently marked.

摘要翻译： 一种准确地确定写入具有多个轨道的记录介质上的有缺陷的伺服脉冲的方法，每个轨道包含多个位置数据部分。 位置数据部分包括能够提供位置误差信息的伺服脉冲串，其可以由具有伺服门允许信号的伺服控制系统选择性地检索。 通过读取每个伺服突发，测量相应的位置误差信息并与可接受的位置误差信息的范围进行比较来识别第一可能的有缺陷的伺服脉冲串。 在禁止从第一可能有缺陷的伺服突发中检索时，测量在第一可能有缺陷的伺服突发之后发生的多个伺服脉冲串的位置误差信息。 如果测量值在可接受的范围内，则第一可能有缺陷的伺服脉冲串被确定为第一确认的有缺陷的伺服脉冲串。 如果不是，则选择性地禁用在第一可能有缺陷的伺服脉冲串之前出现的多个伺服脉冲串，并且测量后续的伺服脉冲串，直到跳过的伺服脉冲串被确定为第一确认的有缺陷的伺服脉冲串。 当从第一确认的有缺陷的伺服脉冲串禁止检索时，测量随后的伺服脉冲串以找到第二可能的有缺陷的伺服脉冲串。 通过在第二可能有缺陷的伺服脉冲串之前选择性地禁止检索第二可能有缺陷的伺服脉冲串和多个伺服脉冲串，还确定第二确认的故障伺服脉冲串。 然后永久标记第一个确认的有缺陷的伺服脉冲串和第二个确认的故障伺服脉冲串。

公开(公告)号：US06674604B1

公开(公告)日：2004-01-06

申请号：US09541401

申请日：2000-03-31

申请人： Jack Ming Teng ,  Kok Hiang Cheong ,  MingZhong Ding ,  KianKeong Ooi

发明人： Jack Ming Teng ,  Kok Hiang Cheong ,  MingZhong Ding ,  KianKeong Ooi

IPC分类号： G11B5596

CPC分类号： G11B5/54

摘要： An information handling system, such as a disc drive, includes a base, a disc stack rotatably attached to the base, and an actuator assembly movably attached to the base. A region of the disc stack is identified as a parking band, and when power is not provided to the disc drive, the actuator assembly is held in a parked position within the parking band by a magnetic latch. The magnetic latch is overcome during a powerup process by a voice coil motor coupled to the actuator. Other regions of the disc stack are associated with various functions performed by the voice coil motor as the actuator passes over such regions.

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叠和可移动地附接到基座的致动器组件。 盘片堆叠的区域被识别为停车带，并且当没有向盘驱动器提供动力时，致动器组件通过磁性闩锁保持在停车带内的停放位置。 在通过耦合到致动器的音圈电机的加电过程中克服磁性锁存器。 磁盘堆叠的其他区域与致动器经过这些区域时由音圈电机执行的各种功能相关联。

公开(公告)号：US06606213B1

公开(公告)日：2003-08-12

申请号：US09332351

申请日：1999-06-11

申请人： Kian Keong Ooi ,  Jack Ming Teng ,  Soon Wah Leow ,  Ming Zhong Ding

发明人： Kian Keong Ooi ,  Jack Ming Teng ,  Soon Wah Leow ,  Ming Zhong Ding

IPC分类号： G11B2102

CPC分类号： G11B5/59633

摘要： A disc drive system and method of screening an actuator resonance includes a servo controller providing a multi-servo zone architecture. The servo controller partitions the disc into a plurality of servo zones. Each of the servo zones has a corresponding servo gain. When an actuator resonance is detected in one of the servo zones, the servo controller reduces the corresponding servo gain of the detected servo zone such that a drive with very low resonance at a certain zone does not affect the servo bandwidth of the other good zones. Accordingly, a drive with very low resonance is prevented from being scrapped. Further, the screening technique allows a drive to have an adequate servo margin for its normal operation after going through a resonance detection test.

摘要翻译： 盘驱动系统和筛选致动器谐振的方法包括提供多伺服区结构的伺服控制器。 伺服控制器将盘划分成多个伺服区。 每个伺服区具有相应的伺服增益。 当在其中一个伺服区域中检测到致动器谐振时，伺服控制器减小检测到的伺服区域的相应伺服增益，使得在某一区域具有非常低的共振的驱动器不影响其它良好区域的伺服带宽。 因此，防止具有非常低谐振的驱动器被报废。 此外，筛选技术允许驱动器在进行共振检测测试之后具有用于其正常操作的足够的伺服余量。

公开(公告)号：US06597528B1

公开(公告)日：2003-07-22

申请号：US09558265

申请日：2000-04-25

申请人： Louis Seng Hong Pang ,  Kian Keong Ooi ,  Jack Ming Teng ,  Ming Zhong Ding

发明人： Louis Seng Hong Pang ,  Kian Keong Ooi ,  Jack Ming Teng ,  Ming Zhong Ding

IPC分类号： G11B5596

CPC分类号： G11B5/5556

摘要： A disc drive includes a base and a disc rotatably attached to the base. The disc drive also includes an actuator assembly rotatably attached to said base and a device for moving the actuator assembly. The actuator assembly includes a transducer head in a transducing relationship with respect to the disc. The disc drive includes a disc drive controller for controlling movement of the actuator during track follow and track seek operations. The disc drive controller monitors the actuator during seek operations. The disc drive controller further computes a maximum average settle time from the monitored settle times. The dis drive controller further compares the maximum average settle time to a predetermined threshold value, and issues a command signal to adjust seek profile parameters of the disc drive to eliminate resonance in the actuator arm during a seek operation.

摘要翻译： 盘驱动器包括基座和可旋转地附接到基座的盘。 盘驱动器还包括可旋转地附接到所述基座的致动器组件和用于移动致动器组件的装置。 致动器组件包括相对于盘的换能关系的换能器头。 磁盘驱动器包括一个磁盘驱动器控制器，用于在轨道跟踪跟踪寻道操作期间控制致动器的运动。 磁盘驱动器控制器在寻道操作期间监视执行器。 磁盘驱动器控制器还从监视的安置时间计算最大平均安置时间。 驱动控制器进一步将最大平均安定时间与预定阈值进行比较，并且发出命令信号以调整盘驱动器的寻找轮廓参数，以消除在寻道操作期间致动器臂中的共振。