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1. 发明授权

US07502205B1 Method of operating read and write transducers by controlling thermal actuation 有权
标题翻译：通过控制热驱动来读写换能器的方法
公开(公告)号：US07502205B1
公开(公告)日：2009-03-10
申请号：US10859919
申请日：2004-06-03
申请人： Tony Hurtado , Wentao Yan , Lin Guo , Chris Hawks , Don Brunnett , Thao Nguyen , Richard Oswald , Erhard Schreck
发明人： Tony Hurtado , Wentao Yan , Lin Guo , Chris Hawks , Don Brunnett , Thao Nguyen , Richard Oswald , Erhard Schreck
IPC分类号： G11B21/02 , G11B5/55
CPC分类号： G11B5/6005 , G11B5/02 , G11B5/6064 , G11B5/607 , G11B2005/0005
摘要： 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.
摘要翻译：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。

2. 发明申请

US20080030894A1 SERVO WRITING WITH OFFSET COMPENSATION FOR PREWRITTEN REFERENCE 有权
标题翻译： SERVO写入偏移补偿用于PREWRITTEN参考
公开(公告)号：US20080030894A1
公开(公告)日：2008-02-07
申请号：US11740747
申请日：2007-04-26
申请人： YU SUN , Dave McMurtrey , Bruce Liikanen , Don Brunnett , John VanLaanen , Charles Watt , Stanley Shepherd , S. Smith , Todd Franks , Lin Guo
发明人： YU SUN , Dave McMurtrey , Bruce Liikanen , Don Brunnett , John VanLaanen , Charles Watt , Stanley Shepherd , S. Smith , Todd Franks , Lin Guo
IPC分类号： G11B17/08
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。

3. 发明授权

US07050260B1 Method and apparatus for partial self-servo writing using servo wedge propagation 有权
标题翻译：使用伺服楔形传播的部分自伺服写入的方法和装置
公开(公告)号：US07050260B1
公开(公告)日：2006-05-23
申请号：US10293904
申请日：2002-11-12
申请人： David M. Tung , Lin Guo , Don Brunnett
发明人： David M. Tung , Lin Guo , Don Brunnett
IPC分类号： G11B21/02
CPC分类号： G11B5/59633 , G11B5/59666
摘要： 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.
摘要翻译：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。

4. 发明授权

US07158325B1 Disk drive head touchdown detection with improved discrimination 有权
标题翻译：磁盘驱动头触地得分检测具有改进的辨别力
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。

5. 发明授权

US07149044B1 Methods, apparatus and computer program products for writing tracks on a disk based on an available stroke 有权
标题翻译：方法，设备和计算机程序产品，用于根据可用的笔划在磁盘上写入轨迹
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。

6. 发明授权

US07106542B1 Method and apparatus for determining embedded runout correction values when self-servo writing or partial self-servo writing a disk drive 失效
标题翻译：当自动伺服写入或部分自动伺服写入磁盘驱动器时，确定嵌入式跳动校正值的方法和装置
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。

7. 发明授权

US07679851B1 Methods and structure for improved disk head switching to avoid zipper zones 有权
标题翻译：改善磁头切换以避免拉链区域的方法和结构
公开(公告)号：US07679851B1
公开(公告)日：2010-03-16
申请号：US11122838
申请日：2005-05-05
申请人： Yu Sun , Don Brunnett , Lin Guo
发明人： Yu Sun , Don Brunnett , Lin Guo
IPC分类号： G11B5/09
CPC分类号： G11B5/59616 , G11B5/012
摘要： 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.
摘要翻译：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。

8. 发明授权

US07355808B1 Method and apparatus for partial self-servo writing using servo wedge propagation 有权
标题翻译：使用伺服楔形传播的部分自伺服写入的方法和装置
公开(公告)号：US07355808B1
公开(公告)日：2008-04-08
申请号：US11439731
申请日：2006-05-23
申请人： David M. Tung , Lin Guo , Don Brunnett
发明人： David M. Tung , Lin Guo , Don Brunnett
IPC分类号： G11B21/02
CPC分类号： G11B5/59633 , G11B5/59666
摘要： 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.
摘要翻译：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。

9. 发明授权

US07230789B1 Method and apparatus for performing a self-servo write operation in a disk drive using spiral servo information 有权
标题翻译：在使用螺旋伺服信息的磁盘驱动器中执行自伺服写入操作的方法和装置
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。

10. 发明授权

US07369345B1 Mobile hard disk drive free fall detection and protection 有权
标题翻译：移动硬盘驱动器自由落体检测和保护
公开(公告)号：US07369345B1
公开(公告)日：2008-05-06
申请号：US11292831
申请日：2005-12-02
申请人： Yunfeng Li , Erhard Schreck , Wei Guo , Tim Glassburn , Mark Heimbaugh , William Flynn , Oliver Northrup , John E. Scura , Lin Guo , Xiaokun Chew
发明人： Yunfeng Li , Erhard Schreck , Wei Guo , Tim Glassburn , Mark Heimbaugh , William Flynn , Oliver Northrup , John E. Scura , Lin Guo , Xiaokun Chew
IPC分类号： G11B5/54 , G11B21/12
CPC分类号： G11B5/5582
摘要： A system provided for protecting a disk drive from impact damages. More specifically, a disk drive is provided that includes an accelerometer interconnected to a printed circuit board that detects free fall of the disk drive. In addition, the velocity of spinning disks of the disk drive is also monitored to assess changes in velocity thereof that may indicate the presence of a tumbling condition. Furthermore, the change in acceleration measured by the accelerometer is monitored to prevent false indications of free fall due to common vibrations. Thus an enhanced system is provided that protects disk drives from the effect of free falls under a wide variety of conditions and allowing for drops from shorter distances to be identified.
摘要翻译：一种用于保护磁盘驱动器免受冲击损坏的系统。更具体地，提供了一种盘驱动器，其包括与检测盘驱动器的自由落下的印刷电路板互连的加速度计。此外，还监视磁盘驱动器的旋转磁盘的速度以评估其速度的变化，其可以指示存在翻滚状况。此外，监测由加速度计测量的加速度变化，以防止由于共同振动引起的自由落体的错误指示。因此，提供了一种增强的系统，其保护磁盘驱动器免受各种条件下的自由落体的影响，并允许识别较短距离的液滴。

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