公开(公告)号：US07064922B1

公开(公告)日：2006-06-20

申请号：US10940312

申请日：2004-09-13

申请人： Steven J. Alfred ,  Raffi Codilian ,  Serge Hauert ,  Lin Yang

发明人： Steven J. Alfred ,  Raffi Codilian ,  Serge Hauert ,  Lin Yang

IPC分类号： G11B17/08

CPC分类号： G11B17/022 ,  G11B17/038

摘要： An aspect of the invention can be regarded as a disk drive that includes a disk drive base and a spindle motor hub rotatably coupled to the disk drive base. The disk drive further includes a first disk disposed about the spindle motor hub and having a first disk stiffness. The disk drive further includes a second disk disposed about the spindle motor hub and having a second disk stiffness different than the first disk stiffness. According to another aspect of the present invention, the second disk has a second disk thickness different than a first disk thickness. According to another aspect of the present invention, the second disk is formed of a second material having a second material stiffness different than a first material stiffness.

摘要翻译： 本发明的一个方面可以被认为是包括盘驱动器基座和可旋转地联接到盘驱动器基座的主轴马达毂的盘驱动器。 磁盘驱动器还包括围绕主轴电动机毂布置并具有第一盘刚度的第一盘。 磁盘驱动器还包括围绕主轴电动机毂布置的第二盘，并具有与第一盘刚度不同的第二盘刚度。 根据本发明的另一方面，第二盘具有不同于第一盘厚度的第二盘厚度。 根据本发明的另一方面，第二盘由具有不同于第一材料刚度的第二材料刚度的第二材料形成。

公开(公告)号：US07064918B1

公开(公告)日：2006-06-20

申请号：US10698273

申请日：2003-10-31

申请人： Raffi Codilian ,  David D. Nguyen

发明人： Raffi Codilian ,  David D. Nguyen

IPC分类号： G11B21/02

CPC分类号： G11B5/59622

摘要： A method for reducing a servo channel head gain calibration time comprising initiating a servo channel head gain calibration process for a head corresponding to the selected disk surface; obtaining a head gain calibration value for a pre-selected zone in the selected disk surface; comparing the obtained calibration value with a pre-stored calibration value for the pre-selected zone and generating a comparison result; and stopping the calibration process for the head if the comparison result does not exceed a threshold value.

摘要翻译： 一种用于减小伺服通道磁头增益校准时间的方法，包括启动与所选磁盘表面对应的磁头的伺服通道磁头增益校准过程; 获得所选磁盘表面中预选区域的磁头增益校准值; 将获得的校准值与预选区域的预先存储的校准值进行比较并生成比较结果; 如果比较结果不超过阈值，则停止头部的校准处理。

公开(公告)号：US07050258B1

公开(公告)日：2006-05-23

申请号：US10329163

申请日：2002-12-24

申请人： Raffi Codilian

发明人： Raffi Codilian

IPC分类号： G11B15/46

CPC分类号： G11B19/28

摘要： The invention relates to a disk drive and related method for improved disk rotation rate control in the presence of seek operations. A spindle motor rotates a spindle, supporting at least one disk with a magnetic recording surface, in response to a motor current. The actuator radially positions a transducer head over the recording surface. The motor is subjected to a torque load component related to the transducer head radial position. The spindle motor controller has a feedback control loop and a feedforward control element. The feedback control loop maintains a relatively constant spindle rotation rate based on a difference error between a predetermined target spindle rotation rate parameter and a measured spindle rotation rate parameter. The feedforward control element, in conjunction with a seek operation, adjusts the motor current based on a target head radial position with respect to an initial head radial position.

摘要翻译： 本发明涉及一种磁盘驱动器及其相关方法，用于在存在寻道操作时提高磁盘转速控制。 主轴电动机响应于电动机电流旋转主轴，支撑具有磁记录表面的至少一个盘。 致动器将换能器头径向放置在记录表面上。 马达受到与换能器头径向位置有关的转矩负载分量。 主轴电机控制器具有反馈控制回路和前馈控制元件。 基于预定的目标主轴转速参数和测量的主轴转速参数之间的差误差，反馈控制回路保持相对恒定的主轴转速。 前馈控制元件结合寻道操作，基于相对于初始头部径向位置的目标头部径向位置来调整电动机电流。

公开(公告)号：US07035026B2

公开(公告)日：2006-04-25

申请号：US10978644

申请日：2004-11-01

申请人： Raffi Codilian ,  William D. Johns ,  Charles A. Park ,  David D. Nguyen ,  Jack M. Chue

发明人： Raffi Codilian ,  William D. Johns ,  Charles A. Park ,  David D. Nguyen ,  Jack M. Chue

IPC分类号： G11B27/36 ,  G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59638 ,  Y10T29/49036

摘要： A method of manufacturing a disk drive and a disk drive where the width of the read element and the width of the write element are both measured at servo-writing time and the track pitch of the disk drive is set on the basis of those measurements. Disk drives with superior head width combinations are servo-written with a narrower track pitch in order to have a higher storage capacity. Disk drives with inferior head width combinations are detected before servo-writing so that the disk drive may be servo-written with wider track pitch rather than with a nominal track pitch that results in a subsequent drive failure during initial burn-in (IBI). The heads are used more efficiently in that heads that are more capable are used to their ability and less capable heads that would otherwise be disposed of are used at all.

摘要翻译： 基于这些测量，设置在伺服写入时刻测量读取元件的宽度和写入元件的宽度的盘驱动器和盘驱动器的方法，并且基于这些测量来设置磁盘驱动器的磁道间距。 具有优异头宽度组合的磁盘驱动器以较窄的磁道间距进行伺服写入，以具有更高的存储容量。 在伺服写入之前检测到具有较差头部宽度组合的磁盘驱动器，以便磁盘驱动器可以以更宽的磁道间距进行伺服写入，而不是在初始老化（IBI）期间导致后续驱动器故障的标称磁道间距。 头部被更有效地使用在那些使用能力更强的头部，否则将被处理的头部不太可用。

公开(公告)号：US06975480B1

公开(公告)日：2005-12-13

申请号：US10125007

申请日：2002-04-17

申请人： Raffi Codilian ,  Hemant Melkote ,  Vinay K. Agarwal

发明人： Raffi Codilian ,  Hemant Melkote ,  Vinay K. Agarwal

IPC分类号： G11B5/596

CPC分类号： G11B5/59627

摘要： A method is disclosed for determining repeatable runout (RRO) cancellation values in a disk drive having a head disk assembly (HDA) and a sampled servo controller. The HDA includes a disk having distributed position information in servo wedges, a rotary actuator carrying a head that periodically reads the position information, and a voice coil motor circuit that responds to a control effort signal. The servo controller periodically adjusts the control effort signal during a track-following operation. In the method, the position information related to a predetermined track is read during track following for more than one disk rotation. The position information is averaged for each servo wedge obtained during the disk rotations. The averaged servo position values are filtered with a filter for compensating effects of the sampled servo controller, which tend to distort the averaged servo position values, to generate the RRO cancellation values for the predetermined track.

摘要翻译： 公开了一种用于确定具有头盘组件（HDA）和采样伺服控制器的磁盘驱动器中的可重复跳动（RRO）消除值的方法。 HDA包括具有伺服楔形体中的分布位置信息的磁盘，承载周期性地读取位置信息的磁头的旋转致动器以及响应于控制力信号的音圈电机电路。 伺服控制器在跟踪跟踪操作期间周期性地调整控制功率信号。 在该方法中，在多于一个盘旋转的跟踪期间，读取与预定轨迹有关的位置信息。 对于在盘旋转期间获得的每个伺服楔，平均位置信息。 平均的伺服位置值用滤波器进行滤波，用于补偿采样伺服控制器的影响，倾向于使平均伺服位置值失真，以产生预定轨迹的RRO抵消值。

公开(公告)号：US06967811B1

公开(公告)日：2005-11-22

申请号：US10884559

申请日：2004-07-02

申请人： Raffi Codilian ,  David D. Nguyen ,  Alexander Babinski

发明人： Raffi Codilian ,  David D. Nguyen ,  Alexander Babinski

IPC分类号： G11B5/55 ,  G11B5/596

CPC分类号： G11B5/5565 ,  G11B5/5547

摘要： A disk drive comprising a first seek operating mode to move the actuator over a seek distance D in a seek time T1, using a first seek profile for minimizing T1, wherein for a first repetitive series of seeks over distance D a servo control system would require a delay time TD between seeks to control temperature rise in a VCM. A second seek operating mode to move the actuator over the seek distance D in a second seek time T2 using a second seek profile for limiting the temperature rise in the VCM, wherein for a second repetitive series of seeks over the seek distance D, a time average TAVG of the T2 seek times is substantially less than T1+TD.

摘要翻译： 一种磁盘驱动器，其特征在于，包括使用第一搜索配置文件来最小化T 1 1的第一寻找操作模式，以使搜索距离D在搜索时间T 1 1中移动，其中 对于用于距离D的第一重复搜索系列，伺服控制系统将需要在VCM中控制温度上升的寻求之间的延迟时间T D D D。 第二寻找操作模式，用于使用第二寻道曲线来移动致动器在寻道距离D上的第二寻道时间T 2，用于限制VCM中的温度上升，其中对于第二次重复的寻迹 在搜索距离D上，T 2寻找时间的时间平均值T AVG 实际上小于T 1 + T D 。

公开(公告)号：US06967804B1

公开(公告)日：2005-11-22

申请号：US10008763

申请日：2001-11-30

申请人： Raffi Codilian

发明人： Raffi Codilian

IPC分类号： G11B5/55 ,  G11B21/02

CPC分类号： G11B5/5582

摘要： A disk drive with a shock event logger that records information about a shock event as determined by a shock detection system. The shock detection system analyzes signals that result from movement of part of the disk drive and determines if the movement is due to a shock. Information about the shock event is recorded by the shock event logger to a non-volatile memory. In one embodiment, the shock detection system is a position error signal processor that detects shocks based on deviation of a transducer from its reference position, or based on time elapsed during settling of the deviated transducer. In one embodiment, the shock event logger records information about the shock event sequentially. In another embodiment, the shock event logger records the shock event information in the form of a histogram. Logged shock event information improves the manner in which the disk drive is diagnosed and serviced.

摘要翻译： 具有震动事件记录器的磁盘驱动器，其记录由冲击检测系统确定的冲击事件的信息。 冲击检测系统分析由磁盘驱动器的一部分运动引起的信号，并确定运动是否由于震动。 有关休克事件的信息由休克事件记录器记录到非易失性存储器。 在一个实施例中，冲击检测系统是位置误差信号处理器，其基于换能器与其参考位置的偏差或基于偏移换能器的稳定期间经过的时间来检测冲击。 在一个实施例中，冲击事件记录器顺序地记录关于冲击事件的信息。 在另一个实施例中，冲击事件记录器以直方图的形式记录冲击事件信息。 记录的休克事件信息改善了磁盘驱动器诊断和维护的方式。

公开(公告)号：US06958881B1

公开(公告)日：2005-10-25

申请号：US10724407

申请日：2003-11-26

申请人： Raffi Codilian ,  Travis E. Ell

发明人： Raffi Codilian ,  Travis E. Ell

IPC分类号： G11B5/596

CPC分类号： G11B5/59627 ,  G11B5/5534

摘要： Disclosed is a control system for processing sampled servo data in a disk drive. The control system includes a microprocessor and a servo processing accelerator circuit for performing operations on the sampled servo data while the microprocessor is executing firmware code. The accelerator circuit supports the use of a higher servo bandwidth thus allowing a higher track density resulting a greater storage capacity for the disk drive. Also, the accelerator circuit relieves the microprocessor of the ordinary servo processing function. Thus, the microprocessor's limited processing capacity to be directed to other controller and interface functions of the disk drive. Only under unusual conditions, such as a write-unsafe (WUS) limit exception, does the microprocessor need to direct processing capacity to the servo processing function. Further, the accelerator circuit may be a decreased response time after reading the servo data from the disk.

摘要翻译： 公开了一种用于在盘驱动器中处理采样的伺服数据的控制系统。 控制系统包括微处理器和伺服处理加速器电路，用于在微处理器执行固件代码时对采样的伺服数据执行操作。 加速器电路支持使用更高的伺服带宽，从而允许更高的磁道密度，从而为磁盘驱动器提供更大的存储容量。 此外，加速器电路可以消除微处理器的普通伺服处理功能。 因此，微处理器的有限处理能力被指向其他控制器和磁盘驱动器的接口功能。 只有在异常情况下，如写入不安全（WUS）极限异常，微处理器才需要将处理能力引导到伺服处理功能。 此外，加速器电路可以是从盘读取伺服数据后的响应时间减少。

公开(公告)号：US06947251B1

公开(公告)日：2005-09-20

申请号：US10724345

申请日：2003-11-26

申请人： Kamran Oveyssi ,  Raffi Codilian

发明人： Kamran Oveyssi ,  Raffi Codilian

IPC分类号： G11B5/55

CPC分类号： G11B5/5526

摘要： A disk drive includes a disk, a voltage supply, a head stack assembly and a switching circuit. The head stack may include a coil portion that includes a coil assembly having first and second wound coils. The switching circuit is electrically coupled to the voltage supply and to the coil assembly, and is configured to selectively switch the first and second wound coils between a first configuration and a second different configuration in which the first wound coil is electrically in parallel with the second wound coil.

摘要翻译： 磁盘驱动器包括磁盘，电压源，磁头堆叠组件和开关电路。 磁头堆叠可以包括线圈部分，其包括具有第一和第二缠绕线圈的线圈组件。 开关电路电耦合到电压源和线圈组件，并且被配置为在第一构造和第二不同构造之间选择性地切换第一和第二绕组线圈，其中第一绕组线圈与第二绕组线圈电平行于第二绕组线圈 绕线圈。

公开(公告)号：US06920004B1

公开(公告)日：2005-07-19

申请号：US10112333

申请日：2002-03-29

申请人： Raffi Codilian ,  Charles W. Frank, Jr.

发明人： Raffi Codilian ,  Charles W. Frank, Jr.

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/09 ,  G11B5/596 ,  G11B27/36

CPC分类号： G11B27/36 ,  G11B5/59616 ,  G11B5/59655 ,  G11B5/59661 ,  G11B5/59688 ,  G11B2220/20

摘要： The present invention may be embodied in a method for adjusting a servo sector detection delay time between detection windows in a disk drive. The disk drive includes a magnetic disk with a spiral track having contiguous storage segments. Each storage segment has a servo sector and a predetermined number of uniformly-sized data sectors. The storage segments are written at a relatively constant linear density along the spiral track. In the method, the magnetic disk is rotated at a constant angular velocity. A servo sector is detected. An adjustable delay time is provided for opening a window to detect a next servo sector. The window is opened after the adjustable delay time expires. A next servo sector is detected in the window. A time between the servo sector detections is measured and the adjustable delay time is adjusted based on the measured time.

摘要翻译： 本发明可以体现在用于调整磁盘驱动器中的检测窗口之间的伺服扇区检测延迟时间的方法。 磁盘驱动器包括具有螺旋轨道的具有连续存储段的磁盘。 每个存储段具有伺服扇区和预定数量的均匀大小的数据扇区。 存储段沿着螺旋轨迹以相对恒定的线密度写入。 在该方法中，磁盘以恒定的角速度旋转。 检测到伺服扇区。 提供可调延迟时间用于打开窗口以检测下一个伺服扇区。 窗口在可调延迟时间到期后打开。 在窗口中检测到下一个伺服扇区。 测量伺服扇区检测之间的时间，并根据测量时间调整可调延迟时间。