公开(公告)号：US07502205B1

公开(公告)日：2009-03-10

申请号：US10859919

申请日：2004-06-03

Applicant: Tony Hurtado ,  Wentao Yan ,  Lin Guo ,  Chris Hawks ,  Don Brunnett ,  Thao Nguyen ,  Richard Oswald ,  Erhard Schreck

Inventor： Tony Hurtado ,  Wentao Yan ,  Lin Guo ,  Chris Hawks ,  Don Brunnett ,  Thao Nguyen ,  Richard Oswald ,  Erhard Schreck

IPC: G11B21/02 ,  G11B5/55

CPC classification number: G11B5/6005 ,  G11B5/02 ,  G11B5/6064 ,  G11B5/607 ,  G11B2005/0005

Abstract: A control source and drivers for a thermal actuator fly height controlled heads in a disk drive system includes provisions for driving a heater element to dissipate various levels of power, and thus actuate the head by a desired amount, depending on whether the head is in a write mode or a read mode. Further, overshoot and undershoot are achieved as desired by providing initial values and equilibrium values and through the use of a control capacitor to provide a time constant to the drive signal to the heater element.

Abstract translation: 磁盘驱动系统中用于热致动器飞高度控制头的控制源和驱动器包括用于驱动加热器元件以消散各种电平的装置的装置，并且因此根据头部是否在头部 写入模式或读取模式。 此外，通过提供初始值和平衡值以及通过使用控制电容器来向加热器元件提供驱动信号的时间常数来实现根据需要实现过冲和下冲。

公开(公告)号：US07167336B1

公开(公告)日：2007-01-23

申请号：US10410576

申请日：2003-04-08

Applicant: Richard M. Ehrlich ,  Don Brunnett ,  Yu Sun

Inventor： Richard M. Ehrlich ,  Don Brunnett ,  Yu Sun

IPC: G11B5/596

CPC classification number: G11B5/59627

Abstract: A method for determining embedded runout correction (ERC) values using iteration and variable gain in a disk drive. A disk has a track written thereon, an ERC value is determined for a servo sector on the track using variable gain, and the variable gain decreases based on the number of revolutions of the disk.

Abstract translation: 一种使用磁盘驱动器中的迭代和可变增益来确定嵌入式跳动校正（ERC）值的方法。 磁盘具有写入的轨道，使用可变增益确定轨道上的伺服扇区的ERC值，并且可变增益基于盘的转数而减小。

公开(公告)号：US07054096B1

公开(公告)日：2006-05-30

申请号：US10338047

申请日：2003-01-06

Applicant: Yu Sun ,  Lin Guo ,  Don Brunnett

Inventor： Yu Sun ,  Lin Guo ,  Don Brunnett

IPC: G11B5/596

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

Abstract: A method and apparatus for compensating for non-linearities due to pivot bearing friction when determining embedded runout correction values during partial self-servo write of a disk drive is disclosed. In one embodiment, the disk drive includes a disk surface having a track written thereon and the track has some written-in runout. The written-in runout that is associated with high-frequencies is determined using a first technique. The written-in runout for the track that is associated with low frequencies is determined using a second technique. Results from the two techniques are combined in order to determine embedded runout correction values for the track when partial self-servo writing, in order to reduce error propagation when writing additional tracks.

Abstract translation: 公开了一种在磁盘驱动器的部分自伺服写入期间确定嵌入的跳动校正值时补偿由于枢转轴承摩擦导致的非线性的方法和装置。 在一个实施例中，盘驱动器包括具有写在其上的轨道的盘表面，并且轨道具有一些写入的跳动。 使用第一技术确定与高频相关联的写入跳动。 使用第二种技术确定与低频相关的轨道的写入跳动。 组合两种技术的结果，以便在部分自伺服写入时确定轨道的嵌入式跳动校正值，以便在写入附加轨道时减少误差传播。

公开(公告)号：US06924952B1

公开(公告)日：2005-08-02

申请号：US09923910

申请日：2001-08-06

Applicant: Don Brunnett ,  Uwe Schwiegelshohn ,  Steve McCarthy

Inventor： Don Brunnett ,  Uwe Schwiegelshohn ,  Steve McCarthy

IPC: G06F3/06 ,  G11B5/09 ,  G11B20/10 ,  G11B20/12 ,  G11B27/36

CPC classification number: G06F3/0619 ,  G06F3/064 ,  G06F3/0674 ,  G11B5/09 ,  G11B20/10 ,  G11B20/1252 ,  G11B27/36 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2220/20 ,  G11B2220/2516

Abstract: A method and apparatus for increasing formatting efficiency of a disk drive is disclosed. In one embodiment, a method for storing data in a disk drive is provided. The disk drive is coupled to a computer via an interface. The method includes the steps of storing data on a disk surface in a disk block having a predetermined length; and, presenting data from the disk drive to the interface as a host block having a predetermined length, wherein the predetermined length of the disk block is equal to N times the predetermined length of the host block, where N is a natural number greater than 1. In one embodiment, a read/modify/write procedure is provided to ensure that data is not lost when a power failure occurs during a write operation when the number of host blocks being written is not a multiple of N.

Abstract translation: 公开了一种用于提高磁盘驱动器的格式化效率的方法和装置。 在一个实施例中，提供了一种用于将数据存储在磁盘驱动器中的方法。 磁盘驱动器经由接口耦合到计算机。 该方法包括以下步骤：将数据存储在具有预定长度的盘块中的盘表面上; 并且将来自磁盘驱动器的数据呈现为具有预定长度的主机块的接口，其中盘块的预定长度等于主机块的预定长度的N倍，其中N是大于1的自然数 在一个实施例中，提供读/修改/写入过程以确保在写入操作期间发生电源故障时数据不会丢失，当正在写入的主机块的数量不是N的倍数时。

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：US06792517B1

公开(公告)日：2004-09-14

申请号：US10173560

申请日：2002-06-18

Applicant: Don Brunnett ,  Erhard Schreck

Inventor： Don Brunnett ,  Erhard Schreck

IPC: G06F1200

CPC classification number: G06F11/1456 ,  Y10S707/99953 ,  Y10S707/99955

Abstract: A personal computer hard disk has disk media that comprises a primary portion and a backup portion; both portions are in the same hard disk housing. The backup portion is logically separate from the primary portion, and access to the logically separate backup portion is controlled by a backup access control mechanism. The backup access control mechanism may comprise a manually-actuable mechanism, such as a switch or a jumper, or it may comprise software provided in an ROM forming part of the internal memory of the hard disk.

Abstract translation: 个人计算机硬盘具有包括主要部分和备用部分的盘介质; 两部分都在相同的硬盘外壳中。 备份部分在逻辑上与主要部分分离，对逻辑上独立的备份部分的访问由备份访问控制机制控制。 备用存取控制机构可以包括诸如开关或跳线的手动致动机构，或者它可以包括提供在形成硬盘的内部存储器的一部分的ROM中的软件。

公开(公告)号：US08665546B1

公开(公告)日：2014-03-04

申请号：US12684045

申请日：2010-01-07

Applicant: Hongchao Tim Zhao ,  Jiangang Liang ,  Yilin Cai ,  Don Brunnett

Inventor： Hongchao Tim Zhao ,  Jiangang Liang ,  Yilin Cai ,  Don Brunnett

IPC: G11B21/02

CPC classification number: G11B5/6076 ,  G11B5/607

Abstract: A disk drive is disclosed comprising a disk, a head for writing data to the disk, and control circuitry coupled to the head. The control circuitry is operable to determine a first set of fly height values and determine a threshold based on the first set of fly height values. The control circuitry determines a second set of fly height values, adjusts the threshold based on the second set of fly height values, and detects a head characteristic based on the adjusted threshold. The head characteristic is detected by detecting a head touchdown event and/or detecting contamination related to the head based on the adjusted threshold.

Abstract translation: 公开了一种磁盘驱动器，其包括盘，用于将数据写入盘的头和耦合到头的控制电路。 控制电路可操作以确定第一组飞行高度值，并基于第一组飞行高度值确定阈值。 控制电路确定第二组飞行高度值，基于第二组飞行高度值来调整阈值，并且基于经调整的阈值检测头部特性。 通过基于经调整的阈值检测头部触地事件和/或检测与头部相关的污染物来检测头部特性。

公开(公告)号：US08179626B1

公开(公告)日：2012-05-15

申请号：US12631716

申请日：2009-12-04

Applicant: Robert P. Ryan ,  Don Brunnett ,  Alain Chahwan ,  Duc T. Phan

Inventor： Robert P. Ryan ,  Don Brunnett ,  Alain Chahwan ,  Duc T. Phan

IPC: G11B27/36

CPC classification number: G11B5/5582 ,  G11B19/042

Abstract: Adaptive shock detection systems are provided according to various embodiments of the present invention. In one embodiment, an adaptive shock detection system comprises a shock sensing circuit, and a controller configured to receive shock detection signals from the shock sensing circuit and to dynamically adjust a sensitivity of the shock sensing circuit based the received shock detection signals.

Abstract translation: 根据本发明的各种实施例提供自适应冲击检测系统。 在一个实施例中，自适应冲击检测系统包括冲击检测电路和被配置为从冲击感测电路接收冲击检测信号并且基于所接收的冲击检测信号动态地调整冲击感测电路的灵敏度的控制器。

公开(公告)号：US07679851B1

公开(公告)日：2010-03-16

申请号：US11122838

申请日：2005-05-05

Applicant: Yu Sun ,  Don Brunnett ,  Lin Guo

Inventor： Yu Sun ,  Don Brunnett ,  Lin Guo

IPC: G11B5/09

CPC classification number: G11B5/59616 ,  G11B5/012

Abstract: Methods and structure for switching heads on a multiple recording surface disk drive that uses bi-directional radial writing toward a zipper zone at a middle diameter. When switching from a first head to a second head, features and aspects hereof assure that the second head will not be positioned in the zipper zone of the corresponding second surface and hence will not lose track following servo synchronization and control. In one aspect, added buffer or guard tracks having valid servo information but no data are added on either side of the zipper zone to assure that under the worst-case misalignment of surfaces the second head will not be positioned in its corresponding zipper zone when switching from the first head.

Abstract translation: 在多个记录表面磁盘驱动器上切换磁头的方法和结构，其使用向中间直径的拉链区域进行双向径向书写。 当从第一头切换到第二头部时，其特征和方面确保第二头部不会被定位在相应的第二表面的拉链区域中，因此在伺服同步和控制之后不会失去跟踪。 在一个方面，在拉链区域的任一侧添加了具有有效的伺服信息而没有数据的附加的缓冲器或保护轨道，以确保在最差的表面未对准的情况下，当切换时，第二头部将不位于相应的拉链区域 从第一个头。

公开(公告)号：US07355808B1

公开(公告)日：2008-04-08

申请号：US11439731

申请日：2006-05-23

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 1x set of servo information and a 2x set of servo information. The disk drive's read head is used to read the 1x set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 2x set of servo information. Then, the disk drive's read head is used to read the 2x set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 1x 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1 x组伺服信息，以便将磁盘驱动器的写入头定位成写入与2 x伺服信息集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 x组伺服信息，以便将磁盘驱动器的写入头定位成写入与1 x伺服信息集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。