公开(公告)号：US07154690B1

公开(公告)日：2006-12-26

申请号：US11110097

申请日：2005-04-19

Applicant: Don Brunnett ,  John Purkett ,  Bruce Liikanen

Inventor： Don Brunnett ,  John Purkett ,  Bruce Liikanen

IPC: G11B19/04

CPC classification number: G11B5/5582 ,  G11B5/596 ,  G11B19/04

Abstract: Dynamically detecting off-track errors in a disk drive by adjusting transducer head position control parameters in response to shock events. In an embodiment, shock events with large magnitude trigger a severe shock timer which lengthens the write fault before write operations resume. In another embodiment, a lower shock threshold is used following an initial shock event. In yet another embodiment, a lower shock threshold is used if an accumulated average position error of the transducer head is large.

Abstract translation: 通过根据冲击事件调整换能器头部位置控制参数来动态地检测磁盘驱动器中的偏离磁道错误。 在一个实施例中，具有大幅度的冲击事件触发严重的冲击计时器，其在写入操作恢复之前延长写入故障。 在另一个实施例中，在初始冲击事件之后使用较低的冲击阈值。 在另一个实施例中，如果换能器头的累积的平均位置误差较大，则使用较低的冲击阈值。

公开(公告)号：US07253982B1

公开(公告)日：2007-08-07

申请号：US11110098

申请日：2005-04-19

Applicant: Don Brunnett ,  John Purkett ,  Bruce Liikanen

Inventor： Don Brunnett ,  John Purkett ,  Bruce Liikanen

IPC: G11B19/04

CPC classification number: G11B19/04 ,  G11B5/5582 ,  G11B19/06

Abstract: Dynamically detecting off-track errors in a disk drive by adjusting transducer head position control parameters in response to shock events. In an embodiment, shock events with large magnitude trigger a severe shock timer which lengthens the write fault before write operations resume. In another embodiment, a lower shock threshold is used following an initial shock event. In yet another embodiment, a lower shock threshold is used if an accumulated average position error of the transducer head is large.

Abstract translation: 通过根据冲击事件调整换能器头部位置控制参数来动态地检测磁盘驱动器中的偏离磁道错误。 在一个实施例中，具有大幅度的冲击事件触发严重的冲击计时器，其在写入操作恢复之前延长写入故障。 在另一个实施例中，在初始冲击事件之后使用较低的冲击阈值。 在另一个实施例中，如果换能器头的累积的平均位置误差较大，则使用较低的冲击阈值。

公开(公告)号：US06882489B1

公开(公告)日：2005-04-19

申请号：US09639567

申请日：2000-08-15

Applicant: Don Brunnett ,  John Purkett ,  Bruce Liikanen

Inventor： Don Brunnett ,  John Purkett ,  Bruce Liikanen

IPC: G11B5/55 ,  G11B5/596 ,  G11B15/04 ,  G11B15/087 ,  G11B19/04

CPC classification number: G11B5/5582 ,  G11B5/596 ,  G11B19/04

Abstract: A method and apparatus for dynamically detecting write fault errors is provided. According to the invention, transducer head control parameters are adjusted according to observed events. For instance, off-track events of a certain magnitude may trigger the implementation of a severe shock timer, which lengthens the delay between the off-track event and allowing write operations to resume, as compared to the standard off-track timer. According to another embodiment of the present invention, a lower write fault threshold is implemented following an off-track event of sufficient magnitude. According to yet another embodiment of the present invention, the average or accumulated position error of the transducer head is monitored, and a lower write fault threshold implemented if the average position error exceeds a threshold value. The present invention's provision of a method and apparatus that enables transducer head control parameters to be modified in response to observed off-track events allows the disk drive to provide high resistance to data loss without significant detrimental effects on the data throughput performance of the disk drive.

Abstract translation: 提供了用于动态检测写入故障错误的方法和装置。 根据本发明，根据观察到的事件来调整传感器头控制参数。 例如，与标准离线定时器相比，具有一定幅度的偏离轨迹事件可能触发实施严重的冲击定时器，其延长了偏离轨道事件之间的延迟并允许写入操作恢复。 根据本发明的另一个实施例，在足够大的偏离轨迹事件之后实现较低写入故障阈值。 根据本发明的另一个实施例，监测换能器头的平均或累积的位置误差，并且如果平均位置误差超过阈值，则实现较低的写入故障阈值。 本发明提供一种能够响应于观察到的偏离轨道事件来修改传感器头部控制参数的方法和装置，使得磁盘驱动器能够对数据丢失提供高抵抗力，而不会对磁盘​​驱动器的数据吞吐量性能造成显着的不利影响 。

公开(公告)号：US20080030894A1

公开(公告)日：2008-02-07

申请号：US11740747

申请日：2007-04-26

Applicant: YU SUN ,  Dave McMurtrey ,  Bruce Liikanen ,  Don Brunnett ,  John VanLaanen ,  Charles Watt ,  Stanley Shepherd ,  S. Smith ,  Todd Franks ,  Lin Guo

Inventor： YU SUN ,  Dave McMurtrey ,  Bruce Liikanen ,  Don Brunnett ,  John VanLaanen ,  Charles Watt ,  Stanley Shepherd ,  S. Smith ,  Todd Franks ,  Lin Guo

IPC: G11B17/08

CPC classification number: G11B25/043 ,  G11B5/59627 ,  G11B5/59661 ,  G11B5/59666

Abstract: 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.

Abstract translation: 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：US07551387B2

公开(公告)日：2009-06-23

申请号：US11740747

申请日：2007-04-26

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

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

IPC: G11B21/02

CPC classification number: G11B25/043 ,  G11B5/59627 ,  G11B5/59661 ,  G11B5/59666

Abstract: 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.

Abstract translation: 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：US07106542B1

公开(公告)日：2006-09-12

申请号：US10318315

申请日：2002-12-11

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

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

IPC: G11B21/02

CPC classification number: G11B5/59633 ,  G11B5/59627 ,  G11B5/59666

Abstract: 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.

Abstract translation: 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：US07050260B1

公开(公告)日：2006-05-23

申请号：US10293904

申请日：2002-11-12

Applicant: David M. Tung ,  Lin Guo ,  Don Brunnett

Inventor： David M. Tung ,  Lin Guo ,  Don Brunnett

IPC: G11B21/02

CPC classification number: G11B5/59633 ,  G11B5/59666

Abstract: A method and apparatus for partial self-servo writing a disk surface in a disk drive using servo wedge propagation is provided. In one embodiment, servo information is written by a servo track writer near an outer diameter of the disk surface. The servo information is grouped into a 1× set of servo information and a 2× set of servo information. The disk drive's read head is used to read the 1× set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 2× set of servo information. Then, the disk drive's read head is used to read the 2× set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 1× set of servo information. The process is repeated on a track-by-track basis until servo information is written from the outer diameter of the disk surface to the inner diameter of the disk surface, as if it was entirely written by a servo track writer.

Abstract translation: 提供了一种使用伺服楔形传播将部分自伺服写入盘驱动器中的盘表面的方法和装置。 在一个实施例中，伺服信息由靠近盘表面的外径的伺服轨迹写入器写入。 伺服信息分为1组伺服信息和2组伺服信息。 磁盘驱动器的读取头用于读取1x组伺服信息，以便将磁盘驱动器的写入头定位成与2组伺服信息径向对齐的伺服信息。 然后，磁盘驱动器的读取头用于读取2组伺服信息，以便将磁盘驱动器的写入头定位成写入与1组伺服信息径向对齐的伺服信息。 在逐个轨道的基础上重复该过程，直到从盘表面的外径到盘表面的内径写入伺服信息为止，就好像完全由伺服记录器写入。

公开(公告)号：US06785080B1

公开(公告)日：2004-08-31

申请号：US09974454

申请日：2001-10-09

Applicant: Yu Sun ,  Don Brunnett ,  XiaoPing Hu

Inventor： Yu Sun ,  Don Brunnett ,  XiaoPing Hu

IPC: G11B2102

CPC classification number: G11B5/59622

Abstract: A method and apparatus for controlling the position of a disk drive transducer head relative to a target track are provided. An oversampled control output allows frequencies that are higher than the Nyquist frequency of the servo control system to be filtered. The system initiates a plurality of control outputs during a single sampling period, allowing the use of a single processor interrupt for each sampling period. The outputs initiated during a single sampling period may be of unequal length. In addition, the outputs may be proportioned so that the total control energy provided to the actuator is equal to the control energy that would be provided by control outputs initiated every one-half sampling period.

Abstract translation: 提供了一种用于控制盘驱动器换能器头相对于目标轨道的位置的方法和装置。 过采样控制输出允许高于伺服控制系统的奈奎斯特频率的频率进行滤波。 系统在单个采样周期内启动多个控制输出，允许在每个采样周期使用单个处理器中断。 在单个采样周期期间发起的输出可能具有不相等的长度。 此外，输出可以成比例，使得提供给致动器的总控制能量等于由每半个采样周期启动的控制输出将提供的控制能量。

公开(公告)号：US06714376B1

公开(公告)日：2004-03-30

申请号：US09905564

申请日：2001-07-13

Applicant: Don Brunnett ,  Lloyd Levy

Inventor： Don Brunnett ,  Lloyd Levy

IPC: G11B2102

CPC classification number: G11B5/59633

Abstract: A method and apparatus for writing servo information to disks within a disk drive is disclosed. A servo track writer is used to write first servo information to the disks. The disk drive is then sealed, and the read/write heads within the disk drive are used to fill in second servo information. The first servo information includes digital information and A, B, C, and D servo bursts for a first number of tracks on the disks. The first servo information also includes digital information and A and B servo bursts for the remaining tracks on the disks. After the disk drive is sealed in the manufacturing process, the read/write heads within the disk drive fill in the second servo information, which includes C and D servo bursts for the remaining tracks. The read head reads the first servo information in the first number of tracks, and the position of the write head is adjusted based on the first servo information. The write head is then used to write the second servo information to a first remaining track, resulting in complete servo information for the first remaining track. The read head then reads the complete servo information in the first remaining track, and writes the second servo information for a second remaining track. This continues until the complete servo information is propagated to all of the remaining tracks.

Abstract translation: 公开了一种将伺服信息写入盘驱动器内的盘的方法和装置。 伺服记录器用于将第一伺服信息写入磁盘。 然后将磁盘驱动器密封，并且使用盘驱动器内的读/写磁头来填充第二伺服信息。 第一伺服信息包括磁盘上的第一数目磁道的数字信息和A，B，C和D伺服脉冲串。 第一伺服信息还包括用于磁盘上剩余磁道的数字信息和A和B伺服脉冲串。 在制造过程中密封磁盘驱动器之后，磁盘驱动器内的读/写磁头填充第二伺服信息，其中包括用于剩余磁道的C和D伺服脉冲串。 读取头读取第一数量的磁道中的第一伺服信息，并且基于第一伺服信息来调整写入头的位置。 然后使用写头将第二伺服信息写入第一剩余磁道，从而产生用于第一剩余磁道的完整伺服信息。 然后，读取头读取第一剩余轨道中的完整伺服信息，并写入第二剩余轨道的第二伺服信息。 这将继续，直到完整的伺服信息传播到所有剩余的轨道。

公开(公告)号：US08065481B1

公开(公告)日：2011-11-22

申请号：US10828098

申请日：2004-04-20

Applicant: Bernhard Hiller ,  Pantelis Alexopoulos ,  Don Brunnett ,  Chandra Buddhavaram ,  Thierry Chatard ,  David Chew ,  Samuel R. Duell ,  Jeff Griffiths ,  Johanna Hernandez ,  Robert L. Kimball ,  Eric Kvamme ,  LeRoy Leach ,  Michael Lee ,  James McGrath ,  Kathleen Fitzgerald, legal representative ,  Robert Milby ,  Bruce Schardt ,  Maurice Schlumberger ,  Erhard Schreck ,  Richard Sonnenfeld

Inventor： Bernhard Hiller ,  Pantelis Alexopoulos ,  Don Brunnett ,  Chandra Buddhavaram ,  Thierry Chatard ,  David Chew ,  Samuel R. Duell ,  Jeff Griffiths ,  Johanna Hernandez ,  Robert L. Kimball ,  Eric Kvamme ,  LeRoy Leach ,  Michael Lee ,  James McGrath ,  Robert Milby ,  Bruce Schardt ,  Maurice Schlumberger ,  Erhard Schreck ,  Richard Sonnenfeld

IPC: G06F12/00

CPC classification number: G06F3/0659 ,  G06F3/0611 ,  G06F3/0689 ,  G06F11/2023

Abstract: A RAID system is provided which can be implemented as a hardware RAID system while avoiding certain shortcomings of previous RAID systems. The RAID system makes it possible to avoid or reduce the number of buffers or processors and can take advantage of drive logic to achieve RAID functions or enhancements. RAID functionality can be provided in a manner to accommodate one or more ATA drive interfaces. To avoid drive replacement problems, host requests for drive serial numbers are responded to with a mirror serial number. In one embodiment, the read address is used to select which drive will perform a read operation.

Abstract translation: 提供RAID系统，可以实现为硬件RAID系统，同时避免以前的RAID系统的某些缺点。 RAID系统可以避免或减少缓冲区或处理器的数量，并且可以利用驱动逻辑来实现RAID功能或增强功能。 可以以适应一个或多个ATA驱动器接口的方式提供RAID功能。 为了避免驱动器更换问题，驱动器序列号的主机请求使用镜像序列号进行响应。 在一个实施例中，读取地址用于选择哪个驱动器将执行读取操作。