公开(公告)号：US07315431B1

公开(公告)日：2008-01-01

申请号：US11274809

申请日：2005-11-15

申请人： Stephen Perlmutter ,  Thomas Melrose ,  James Hargarten ,  Don Brunnett ,  Lloyd Levy ,  Adrián Cerdá

发明人： Stephen Perlmutter ,  Thomas Melrose ,  James Hargarten ,  Don Brunnett ,  Lloyd Levy ,  Adrián Cerdá

IPC分类号： G11B5/596

CPC分类号： G11B5/59627

摘要： A disk drive measures the radial misposition of tracks and repositions the tracks at regularly spaced intervals. Written in runout (WRO) in servo bursts is determined to calculate track spacing and squeeze among adjacent tracks. Tracks with improper spacing are repositioned by adding a squeeze correction term to the servo wedges. Thereafter, when the disk drive operates to store data, the servo bursts are used to calculate a position error signal (PES), and the squeeze correction term is combined with the PES to position the head at a proper track radius.

摘要翻译： 磁盘驱动器测量轨道的径向偏移并以规则间隔的间隔重新定位轨道。 在伺服脉冲串中写入跳动（WRO）被确定为计算轨道间距并在相邻轨道之间挤压。 通过向伺服楔加一个挤压修正项来重新定位具有不正确间距的轨迹。 此后，当磁盘驱动器操作以存储数据时，使用伺服脉冲串来计算位置误差信号（PES），并将挤压校正项与PES组合以将磁头定位在适当的轨道半径处。

公开(公告)号：US20070297088A1

公开(公告)日：2007-12-27

申请号：US11724436

申请日：2007-03-15

申请人： Yu Sun ,  Don Brunnett ,  Lloyd Levy ,  Thomas Melrose

发明人： Yu Sun ,  Don Brunnett ,  Lloyd Levy ,  Thomas Melrose

IPC分类号： G11B5/58

CPC分类号： G11B5/59627 ,  G11B5/59633

摘要： Performing embedded runout correction for a track on a rotational data storage disk includes measuring written-in runout for the track, selecting a number of revolutions in response to the measured written-in runout of the track, calculating embedded correction values for the track for the selected number of revolutions of the rotational data storage disk, and storing the embedded correction values.

摘要翻译： 对旋转数据存储盘上的轨道执行嵌入式跳动校正包括测量轨道的写入跳动，响应于轨迹的测量写入跳动选择转数，计算轨道的嵌入校正值 选择旋转数据存储盘的转数，并存储嵌入的校正值。

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：US07489469B2

公开(公告)日：2009-02-10

申请号：US11724436

申请日：2007-03-15

申请人： Yu Sun ,  Don Brunnett ,  Lloyd Levy ,  Thomas O. Melrose

发明人： Yu Sun ,  Don Brunnett ,  Lloyd Levy ,  Thomas O. Melrose

IPC分类号： G11B5/596

CPC分类号： G11B5/59627 ,  G11B5/59633

摘要： Performing embedded runout correction for a track on a rotational data storage disk includes measuring written-in runout for the track, selecting a number of revolutions in response to the measured written-in runout of the track, calculating embedded correction values for the track for the selected number of revolutions of the rotational data storage disk, and storing the embedded correction values.

摘要翻译： 对旋转数据存储盘上的轨道执行嵌入式跳动校正包括测量轨道的写入跳动，响应于轨迹的测量写入跳动选择转数，计算轨道的嵌入校正值 选择旋转数据存储盘的转数，并存储嵌入的校正值。

公开(公告)号：US07400473B1

公开(公告)日：2008-07-15

申请号：US11048998

申请日：2005-02-01

申请人： Douglas J. Krajnovich ,  Erhard Schreck ,  Kaz Saito ,  Don Brunnett

发明人： Douglas J. Krajnovich ,  Erhard Schreck ,  Kaz Saito ,  Don Brunnett

IPC分类号： G11B5/56 ,  G11B5/39

CPC分类号： G11B5/3136 ,  G11B5/6064 ,  G11B5/607

摘要： A disk drive includes a rotatable storage disk, a suspension, and a slider assembly. The slider assembly includes a slider body, a first slider deformer and a second slider deformer. Activation of the first slider deformer deforms the slider body, and activation of the second slider deformer deforms the slider body. Further, the slider deformers can be independently controllable. The read element is positioned near the first slider deformer and the write element is positioned near the second slider deformer. Activation of the first slider deformer adjusts a read head-to-disk spacing of the read element and activation of the second slider deformer adjusts a write head-to-disk spacing of the write element. Further, activation of the first slider deformer does not significantly influence the write head-to-disk spacing and activation of the second slider deformer does not significantly influence the read head-to-disk spacing.

摘要翻译： 磁盘驱动器包括可旋转存储盘，悬架和滑块组件。 滑块组件包括滑块体，第一滑块变形器和第二滑块变形器。 第一滑块变形器的激活使滑块体变形，并且第二滑块变形器的激活使滑块体变形。 此外，滑块变形器可以是独立可控的。 读取元件位于第一滑块变形器附近，并且写入元件位于第二滑块变形器附近。 第一滑块变形器的激活调整读取元件的读取磁头与磁盘的间隔，并且第二滑块变形器的激活调节写入元件的写入磁头到磁盘的间隔。 此外，第一滑块变形器的激活不会对写入磁头到磁盘间隔产生显着的影响，并且第二滑块变形器的激活不会显着影响读取的磁头到磁盘的间隔。

公开(公告)号：US07170700B1

公开(公告)日：2007-01-30

申请号：US10125657

申请日：2002-04-18

申请人： Gang H. Lin ,  Erhard Schreck ,  Kezhao Zhang ,  Don Brunnett ,  Duc Banh ,  Kurt Rusnak ,  Jingbo Yu ,  Suet Teo ,  Nick Warner ,  John Vicars

发明人： Gang H. Lin ,  Erhard Schreck ,  Kezhao Zhang ,  Don Brunnett ,  Duc Banh ,  Kurt Rusnak ,  Jingbo Yu ,  Suet Teo ,  Nick Warner ,  John Vicars

IPC分类号： G11B27/36 ,  G11B5/03

CPC分类号： G11B5/024 ,  G11B20/182 ,  G11B27/36 ,  G11B2220/2516

摘要： A method of determining side track erasure in a disk drive having a disk and a transducer. A target track and one or more side tracks proximate to the target track on the disk are selected, and recording parameters for recording signals on the target track and each side track with the transducer are selected. Thereafter, signals are recorded on each side track and then signals are recorded on the target track multiple times. A reduction in the integrity of the recorded signals on each side track due to recording signals on the target track multiple times is detected, and the detected reduction in the integrity of the recorded signals on each side track represents the amount of the erasure of the recorded signals on the side track. Recording parameters are changed based on the signal integrity reduction to minimize side track erasure.

摘要翻译： 一种在具有盘和换能器的盘驱动器中确定侧轨道擦除的方法。 选择目标轨道和靠近盘上的目标轨道的一个或多个侧轨道，并且选择用于使用换能器在目标轨道和每个侧轨上记录信号的记录参数。 此后，信号被记录在每个侧轨道上，然后将信号多次记录在目标轨道上。 检测到由于在目标轨道上多次记录信号而导致的每个侧轨道上的记录信号的完整性的降低，并且检测到的每个侧轨道上记录信号的完整性的降低表示记录的擦除量 侧轨上的信号。 记录参数根据信号完整性降低而改变，以尽量减少侧轨跟踪擦除。

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。