公开(公告)号：US07230789B1

公开(公告)日：2007-06-12

申请号：US11102467

申请日：2005-04-08

申请人： Don Brunnett ,  Yu Sun ,  Lin Guo

发明人： Don Brunnett ,  Yu Sun ,  Lin Guo

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59661

摘要： The present invention is directed to a method and apparatus for performing a self-servo write operation in a disk drive. In one embodiment, the disk drive includes a disk surface having a read head and a write head associated therewith. Spiral servo information is written onto the disk surface using a servo track writer. The read head reads the spiral servo information and is used to position the write head, which writes a small band of final servo information onto the disk surface. The small band of final servo information may be embedded servo information. Importantly, the small band of final servo information is not written using the servo track writer. The write head is also used to write self-servo write instructions into the small band of final servo information. Subsequently, the self-servo write instructions are read and a self-servo write operation is performed using the spiral servo information.

摘要翻译： 本发明涉及一种用于在磁盘驱动器中执行自伺服写入操作的方法和装置。 在一个实施例中，盘驱动器包括具有读头的盘表面和与其相关联的写头。 使用伺服记录器将螺旋伺服信息写入磁盘表面。 读头读取螺旋伺服信息，并用于将写入头定位在磁盘表面上，将写入磁头写入最小伺服信息的一小段。 最终伺服信息的小带可以是嵌入式伺服信息。 重要的是，最终的伺服信息的小带没有使用伺服记录器写入。 写头还用于将自伺服写指令写入最终伺服信息的小波段。 随后，读取自伺服写指令，并使用螺旋伺服信息执行自伺服写操作。

公开(公告)号：US07193797B1

公开(公告)日：2007-03-20

申请号：US11102470

申请日：2005-04-08

申请人： Yu Sun ,  Don Brunnett

发明人： Yu Sun ,  Don Brunnett

IPC分类号： G11B27/36

CPC分类号： G11B20/1217 ,  G11B5/59633 ,  G11B5/59666 ,  G11B27/36 ,  G11B2020/1282

摘要： The present invention is directed to a method and apparatus for detecting and monitoring a bi-state head when self-servowriting a disk drive. In one embodiment, an integration window is opened about an expected time that a read head will read spiral servo information. An integration value associated with the integration window is determined. Next, a determination is made as to whether the integration value is less than a predetermined low amplitude limit. If it is, a comparison is made between a location of a maximum sync frame of a read signal envelope in the integration window and the center of the integration window. The read head is identified as a bi-state head if the location of the maximum sync frame is greater than a predetermined off-center limit relative to the location of the center of the integration window.

摘要翻译： 本发明涉及一种用于在自伺服磁盘驱动器时检测和监视双态磁头的方法和装置。 在一个实施例中，关于读取头将读取螺旋伺服信息的期望时间打开积分窗口。 确定与集成窗口相关联的积分值。 接下来，确定积分值是否小于预定的低振幅限制。 如果是，则在积分窗口中的读信号包络的最大同步帧的位置与积分窗的中心进行比较。 如果最大同步帧的位置相对于积分窗口的中心的位置大于预定的偏心极限，则读头被识别为双态头。

公开(公告)号：US06765747B1

公开(公告)日：2004-07-20

申请号：US10010557

申请日：2001-11-07

申请人： Yu Sun ,  Don Brunnett

发明人： Yu Sun ,  Don Brunnett

IPC分类号： G11B5596

CPC分类号： G11B5/59627

摘要： A method and apparatus are disclosed which allow for compensation of repeatable runout in a disk drive when an actuator arm assembly has a relatively high friction to inertia ratio in a pivot bearing assembly. The compensation uses one of two initial runout coefficients, based on a seek length. If the seek length is shorter than a predetermined distance, a current runout coefficient is used to compensate for repeatable runout which is continuously updated throughout a previous seek operation. If the seek length is greater than the predetermined distance, a transient runout coefficient is used to compensate for repeatable runout which is updated following the initial revolutions of the hard disk.

摘要翻译： 公开了一种方法和装置，当致动器臂组件在枢转轴承组件中具有相对较高的摩擦惯性比时，允许在盘驱动器中补偿可重复的跳动。 基于寻道长度，补偿使用两个初始跳动系数之一。 如果寻找长度小于预定距离，则使用电流跳动系数来补偿在先前的寻找操作中不断更新的可重复跳动。 如果搜索长度大于预定距离，则使用瞬时跳动系数来补偿在硬盘的初始转动之后更新的可重复跳动。

公开(公告)号：US07545593B1

公开(公告)日：2009-06-09

申请号：US11075285

申请日：2005-03-08

申请人： Yu Sun ,  Bill Flynn ,  Don Brunnett

发明人： Yu Sun ,  Bill Flynn ,  Don Brunnett

IPC分类号： G11B27/36 ,  G11B15/04 ,  G11B19/04 ,  G11B5/596

CPC分类号： G11B19/045 ,  G11B5/596 ,  G11B5/59627

摘要： A magnetic storage system includes a disk, a head, an actuator, and a servo controller. The servo controller monitors a value, such as a position error signal (PES) sample value, a predicted PES sample value, and the like, that is based on servo information provided by the head. The servo controller provides a signal to inhibit writing by the head based on a comparison of the monitored value with a threshold, such as a write fault window (WFW), a PES plus Velocity (PPV) threshold, and the like. The servo controller sets the threshold to a first value based on at least one of an on-track track misregistration (TMR) value and a seek settle TMR value. When the servo controller determines that the head is subject to a vibration condition, the servo controller sets the threshold to a second value that is different from the first value.

摘要翻译： 磁存储系统包括盘，头，致动器和伺服控制器。 伺服控制器基于由头提供的伺服信息来监视诸如位置误差信号（PES）采样值，预测的PES采样值等的值。 伺服控制器基于监视值与诸如写入故障窗口（WFW），PES加速度（PPV）阈值等的阈值的比较来提供用于禁止头部写入的信号。 伺服控制器基于轨道磁道重合失调（TMR）值和寻道稳定TMR值中的至少一个将阈值设置为第一值。 当伺服控制器确定头受到振动条件时，伺服控制器将阈值设置为不同于第一值的第二值。

公开(公告)号：US07158325B1

公开(公告)日：2007-01-02

申请号：US10984559

申请日：2004-11-08

申请人： Xiaoping Hu ,  Yu Sun ,  Lin Guo ,  Don Brunnett

发明人： Xiaoping Hu ,  Yu Sun ,  Lin Guo ,  Don Brunnett

IPC分类号： G11B15/18

CPC分类号： G11B5/59627 ,  G11B5/6076

摘要： A disk drive detects head touchdown based on a magnitude of a position error signal at a discrete frequency. The discrete frequency is one-half the disk rotation frequency or an integral multiple of the disk rotation frequency. The head is heated by turning on a heater at the discrete frequency, thereby injecting bias into a servo system that increases the PES magnitude. In addition, the servo system has a first transfer function for tracking the head during read and write operations and a second transfer function for tracking the head during head touchdown detection. The second transfer function has smaller vibration rejection than the first transfer function so that the disk drive is less sensitive to vibration during read and write operations than during head touchdown detection.

摘要翻译： 磁盘驱动器基于离散频率处的位置误差信号的大小来检测磁头触地。 离散频率是磁盘旋转频率的一半或磁盘旋转频率的整数倍。 通过以离散频率打开加热器来加热头部，从而将偏压注入到增加PES量值的伺服系统中。 此外，伺服系统具有用于在读取和写入操作期间跟踪头部的第一传递功能，以及用于在头部触地检测期间跟踪头部的第二传递功能。 第二传递函数具有比第一传递函数更小的振动抑制，使得磁盘驱动器在读取和写入操作期间比在头部触地检测期间对振动较不敏感。

公开(公告)号：US07149044B1

公开(公告)日：2006-12-12

申请号：US10895467

申请日：2004-07-20

申请人： Yuan Chen ,  Brian Rigney ,  Lin Guo ,  Don Brunnett ,  Yu Sun ,  Stanley H. Shepherd

发明人： Yuan Chen ,  Brian Rigney ,  Lin Guo ,  Don Brunnett ,  Yu Sun ,  Stanley H. Shepherd

IPC分类号： G11B5/09

CPC分类号： B82Y10/00 ,  G11B5/59677 ,  G11B5/743

摘要： Track pitch for writing tracks on a disk is determined based on an available stroke across the disk. The available stroke is identified by searching across the disk for where information can be written and read. The track pitch is determined for writing tracks on the disk based on the available stroke across the disk. Tracks are written on the disk based on the determined track pitch.

摘要翻译： 基于磁盘上的可用笔划确定在磁盘上写入轨迹的轨距。 通过在磁盘上搜索可以写入和读取信息的位置来识别可用笔画。 确定磁道间距是根据磁盘上可用的行程在磁盘上写入磁道。 基于确定的轨道间距将磁道写入磁盘。

公开(公告)号：US07106542B1

公开(公告)日：2006-09-12

申请号：US10318315

申请日：2002-12-11

申请人： Yu Sun ,  Lin Guo ,  Don Brunnett ,  Georgie Tan ,  John Purkett

发明人： Yu Sun ,  Lin Guo ,  Don Brunnett ,  Georgie Tan ,  John Purkett

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59627 ,  G11B5/59666

摘要： A method and apparatus for determining embedded runout correction values when self-servo writing or partial self-servo writing is disclosed. In one embodiment, a disk surface, which has servo information written thereon, is provided. The servo information is grouped into 1x servo sectors and 2x servo sectors, and the 1x servo sectors and the 2x servo sectors form a plurality of tracks. A read head servos on the 1x servo sectors associated with a track. Both position error signals due to repeatable runout for the 1x servo sectors and information related to position error signals due to repeatable runout for the 2x servo sectors are determined, while servoing on the 1x servo sectors. Embedded runout correction values for the 1x servo sectors and the 2x servo sectors are calculated.

摘要翻译： 一种当自动伺服写入或部分自伺服写入时确定嵌入的跳动校正值的方法和装置。 在一个实施例中，提供了其上写有伺服信息的盘表面。 伺服信息被分组为1×伺服扇区和2×伺服扇区，1×伺服扇区和2×伺服扇区形成多个轨道。 与磁道相关的1个伺服扇区上的读头伺服。 由于1 x伺服扇区的可重复跳动和由于2 x伺服扇区的可重复跳动引起的与位置误差信号相关的信息，确定了两个位置误差信号，同时在1个伺服扇区上进行伺服。 计算1 x伺服扇区和2 x伺服扇区的嵌入式跳动校正值。

公开(公告)号：US06987638B1

公开(公告)日：2006-01-17

申请号：US10430898

申请日：2003-05-05

申请人： Don Brunnett ,  Yu Sun

发明人： Don Brunnett ,  Yu Sun

IPC分类号： G11B5/596

CPC分类号： G11B5/59627

摘要： A method and apparatus for applying adaptive non-linear repeatable runout compensation in a disk drive is provided. In one embodiment, the present invention provides a disk surface having a track written thereon, wherein the track includes repeatable runout. A non-linear converge gain is applied to compensate for the repeatable runout. In one embodiment, the converge gain is based upon an amplitude of a position error signal associated with the repeatable runout at a frequency of rotation of the disk surface (or multiple thereof).

摘要翻译： 提供了一种在磁盘驱动器中应用自适应非线性可重复跳动补偿的方法和装置。 在一个实施例中，本发明提供具有写在其上的轨道的盘表面，其中轨道包括可重复的跳动。 应用非线性收敛增益来补偿可重复的跳动。 在一个实施例中，会聚增益基于与盘表面（或其多个）的旋转频率处的可重复跳动相关联的位置误差信号的幅度。

公开(公告)号：US07551387B2

公开(公告)日：2009-06-23

申请号：US11740747

申请日：2007-04-26

申请人： Yu Sun ,  Dave McMurtrey ,  Bruce Liikanen ,  Don Brunnett ,  John W. VanLaanen ,  Charles R. Watt ,  Stan Shepherd ,  S. Craig Smith ,  Todd Franks ,  Lin Guo

发明人： Yu Sun ,  Dave McMurtrey ,  Bruce Liikanen ,  Don Brunnett ,  John W. VanLaanen ,  Charles R. Watt ,  Stan Shepherd ,  S. Craig Smith ,  Todd Franks ,  Lin Guo

IPC分类号： G11B21/02

CPC分类号： G11B25/043 ,  G11B5/59627 ,  G11B5/59661 ,  G11B5/59666

摘要： In accordance with various embodiments, a rotatable member is mounted to a spindle hub so that initial servo data previously provided to the rotatable member are eccentrically offset with respect to a rotational center of the spindle hub. Compensation vales are determined to characterize said offset, after which final servo data are provided to the rotatable member in relation to the initial servo data and the determined compensation values. The final servo data are nominally concentric with the rotational center of the spindle hub.

摘要翻译： 根据各种实施例，可旋转构件安装到主轴毂，使得先前提供给可旋转构件的初始伺服数据相对于主轴毂的旋转中心偏心偏移。 确定补偿值以表征所述偏移，之后相对于初始伺服数据和确定的补偿值将最终伺服数据提供给可旋转构件。 最终伺服数据名义上与主轴毂的旋转中心同心。

公开(公告)号：US07423834B1

公开(公告)日：2008-09-09

申请号：US11005130

申请日：2004-12-06

申请人： Yu Sun ,  Don Brunnett

发明人： Yu Sun ,  Don Brunnett

IPC分类号： G11B5/596

CPC分类号： G11B5/59627

摘要： Real-time correction of repeatable runout for multiple harmonic frequencies is provided by using convolution of a position error signal, or similar real-time signal, with an impulse response of a specific transfer function, such as the inverse of the disturbance transfer function. Multiple harmonic frequencies can be followed substantially simultaneously to achieve small position error and good tracking misregistration (TMR) performance. The impulse response can be obtained, calculated and stored off-line. The impulse response can be configured to substantially eliminate correction of one or more frequency or frequency ranges. Convolution can be done relatively quickly with proper arrangement of memory.

摘要翻译： 通过使用位置误差信号或类似实时信号的卷积与特定传递函数的脉冲响应（例如干扰传递函数的倒数）来提供多重谐波频率的可重复跳动的实时校正。 可以基本上同时跟踪多个谐波频率，以实现小位置误差和良好的跟踪重合失调（TMR）性能。 脉冲响应可以获得，计算和离线存储。 脉冲响应可以被配置为基本上消除一个或多个频率或频率范围的校正。 卷积可以通过适当的记忆排列相对较快地进行。