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1. 发明授权

US08917469B1 Disk drive correcting an error in a detected gray code 有权
标题翻译：磁盘驱动器校正检测到的灰色代码中的错误
公开(公告)号：US08917469B1
公开(公告)日：2014-12-23
申请号：US13614894
申请日：2012-09-13
申请人： Guoxiao Guo , Donald Brunnett , Jianguo Zhou , Wai Ee Wong
发明人： Guoxiao Guo , Donald Brunnett , Jianguo Zhou , Wai Ee Wong
IPC分类号： G11B5/09
CPC分类号： G11B5/59655 , G11B5/59627 , G11B5/59644 , G11B20/10268 , G11B20/1403 , G11B20/18 , G11B2020/10916
摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks defined by a plurality of servo sectors. An estimated track ID is generated and a plurality of proximate track IDs is generated having values proximate the estimated track ID. A set of Gray codes is generated each corresponding to the estimated track ID and the proximate track IDs, wherein each Gray code in the set of Gray codes comprises N bits, and M bits out of a high order of the N bits comprise the same value. A recorded Gray code is detected in a first servo sector to generate a detected Gray code, and an error in the detected Gray code is corrected by inverting at least one bit in the detected Gray code comprising a value that is different from the value of the corresponding bit in the M bits.
摘要翻译：公开了一种磁盘驱动器，包括在包括由多个伺服扇区限定的多个磁道的盘上驱动的磁头。产生估计的轨道ID，并且生成具有接近估计轨道ID的值的多个邻近轨道ID。产生一组格雷码，每组格对应于估计的轨道ID和邻近轨道ID，其中格雷码组中的每个格雷码包括N比特，并且N比特的高阶中的M比特包含相同的值。在第一伺服扇区中检测到记录的格雷码，以产生检测到的格雷码，并且通过将检测到的格雷码中的至少一个比特反相来校正检测格雷码中的误差，该比特包括不同于 M位中的相应位。

2. 发明授权

US08289646B1 Disk drive having a disk limiter that is disposed within an angular range relative to a base depression brim 有权
标题翻译：磁盘驱动器具有盘限制器，其相对于基座凹陷边缘设置在角度范围内
公开(公告)号：US08289646B1
公开(公告)日：2012-10-16
申请号：US12822452
申请日：2010-06-24
申请人： Baekho Heo , Enoch Mylabathula , Jifang Tian , Donald Brunnett
发明人： Baekho Heo , Enoch Mylabathula , Jifang Tian , Donald Brunnett
IPC分类号： G11B33/14
CPC分类号： G11B25/043
摘要： A disk drive includes a spindle that defines a spindle rotation axis, and a disk drive base that has a base depression bounded by a first base depression brim. A disk is attached to the spindle, and the disk includes a disk outer peripheral extent. The disk drive includes a disk limiter protrusion extending over an arc of the disk outer peripheral extent that spans no more than 20° about the spindle rotation axis. According to one aspect of the invention, a first radius that extends from the spindle rotation axis over the first base depression brim is angularly disposed no more than 25° from any second radius that extends from the spindle rotation axis to the disk limiter protrusion. According to another aspect of the invention, the disk limiter protrusion may protrude from an edge of a VCM yoke top plate towards the spindle rotation axis.
摘要翻译：磁盘驱动器包括限定主轴旋转轴的主轴和具有由第一基座凹陷边缘限定的基座凹陷的磁盘驱动器底座。磁盘安装在主轴上，磁盘包括一个磁盘的外周范围。磁盘驱动器包括磁盘限制器突出部，该磁盘限制器突起在盘外周延伸的圆弧上延伸，绕主轴旋转轴线跨过不超过20°。根据本发明的一个方面，从主轴旋转轴线延伸到第一基座凹陷边缘上的第一半径与从主轴旋转轴线延伸到盘限制器突起的任何第二半径成角度地设置成不超过25°。根据本发明的另一方面，盘限制器突起可以从VCM轭顶板的边缘向主轴旋转轴线突出。

3. 发明授权

US08605382B1 Disk drive to load a head to a load/unload (LUL) zone of a disk 有权
标题翻译：将磁盘加载到磁盘的加载/卸载（LUL）区域的磁盘驱动器
公开(公告)号：US08605382B1
公开(公告)日：2013-12-10
申请号：US13155675
申请日：2011-06-08
申请人： Michael L. Mallary , Donald Brunnett , Diep L. Nguyen , Gerardo A. Bertero
发明人： Michael L. Mallary , Donald Brunnett , Diep L. Nguyen , Gerardo A. Bertero
IPC分类号： G11B5/54 , G11B21/02
CPC分类号： G11B5/54 , G11B21/12
摘要： A disk drive to load a head to a load/unload (LUL) zone of a disk is disclosed. The disk drive comprises an actuator including a head; a disk having a plurality of tracks; and a processor to control the movement of the actuator and the head relative to the disk. The processor may further: measure a back electromagnetic force (BEMF) of a spindle stator of a spindle motor after turning off the spindle motor; identify a modulation feature of the BEMF that indicates an identifiable circumferential position; command the storage the modulation feature of the BEMF; and control loading the head onto the LUL zone of the disk when the modulation feature is matched.
摘要翻译：公开了将磁头加载到磁盘的加载/卸载（LUL）区域的磁盘驱动器。磁盘驱动器包括：致动器，包括头部; 具有多个轨道的盘; 以及用于控制致动器和头相对于盘的运动的处理器。处理器可以进一步：在关闭主轴电动机之后测量主轴电动机的主轴定子的反向电磁力（BEMF）; 识别指示可识别的圆周位置的BEMF的调制特征; 命令存储BEMF的调制特性; 并且当调制特征匹配时，控制将磁头加载到磁盘的LUL区域上。

4. 发明授权

US08059360B1 Disk drive compensating for radial phase change of repeatable position error due to servo writing from spiral tracks 有权
标题翻译：磁盘驱动器补偿由于从螺旋磁道的伺服写入引起的重复位置误差的径向相位变化
公开(公告)号：US08059360B1
公开(公告)日：2011-11-15
申请号：US12820536
申请日：2010-06-22
申请人： Hemant Melkote , Donald Brunnett
发明人： Hemant Melkote , Donald Brunnett
IPC分类号： G11B5/596
CPC分类号： G11B5/59627 , G11B5/59661 , G11B5/59666
摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo sectors defining a plurality of tracks, wherein the servo sectors are written to the disk by servoing off of spiral tracks. The head is positioned over a target track in response to the servo sectors, and coefficients of a first sinusoid are generated corresponding to the target track, wherein the first sinusoid corresponds a repeatable position error of the head relative to the target track. The coefficients of the first sinusoid comprise a coherent component due to a repeatable runout of the disk and a spiral component due to writing the servo sectors by servoing off of the spiral tracks, where the spiral component varies based on a radial location of the head. The head is servoed over the target track in response to the coefficients.
摘要翻译：公开了一种磁盘驱动器，其包括在盘上致动的磁头，该磁头包括限定多个磁道的多个伺服扇区，其中通过伺服脱离螺旋磁道将伺服扇区写入磁盘。响应于伺服扇区，头部位于目标轨道上方，并且对应于目标轨迹产生第一正弦曲线的系数，其中第一正弦曲线对应于头部相对于目标轨迹的可重复位置误差。第一正弦曲线的系数由于盘的可重复跳动而产生相干分量，并且由于通过伺服从螺旋轨迹写入伺服扇区的螺旋分量，其中螺旋分量基于头的径向位置而变化。响应于系数，磁头在目标轨道上被伺服。

5. 发明授权

US4910617A Disk drive head positioning servo system utilizing encoded track zone information 失效
标题翻译：磁盘驱动头定位伺服系统利用编码的轨道区信息
公开(公告)号：US4910617A
公开(公告)日：1990-03-20
申请号：US188048
申请日：1988-04-29
申请人： Donald Brunnett , Ashok K. Desai , Mark A. Heimbaugh
发明人： Donald Brunnett , Ashok K. Desai , Mark A. Heimbaugh
IPC分类号： G11B5/596 , G11B21/10
CPC分类号： G11B5/59633 , G11B21/106
摘要： The invention is directed to a head positioning servo system for disk drives employing a dedicated servo surface. A plurality of servo cells are recorded on the servo surface each including a sync field for storing multiple magnetic flux transitions. Each sync field consists of multiple unit areas wherein each of said transitions is selectively stored in one or more of said unit areas. In the preferred embodiment, each sync field includes double frequency (2f) transitions which are stored in a single unit area and single frequency (1f) transitions which are stored in two adjacent unit areas. The two types of transitions are used to encode each sync field to define either a valid ("1") sync or a nonvalid ("0") sync. Valid syncs are detected to generate sync pulses for timing control to derive both rotational and radial position information from the servo surface.
摘要翻译：本发明涉及一种采用专用伺服表面的磁盘驱动器的磁头定位伺服系统。多个伺服单元被记录在伺服表面上，每个伺服单元包括用于存储多个磁通过渡的同步场。每个同步字段由多个单位区域组成，其中每个所述转换被选择性地存储在一个或多个所述单位区域中。在优选实施例中，每个同步字段包括存储在单个单元区域中的双倍频率（2f）转换和存储在两个相邻单元区域中的单个频率（1f）转换。两种类型的转换用于对每个同步字段进行编码以定义有效（“1”）同步或非有效（“0”）同步。检测有效同步以产生用于定时控制的同步脉冲以从伺服表面导出旋转和径向位置信息。

6. 发明授权

US4831470A Method and apparatus for recording disk servo information with detachable position decoder 失效
标题翻译：用可拆卸位置解码器记录磁盘伺服信息的方法和装置
公开(公告)号：US4831470A
公开(公告)日：1989-05-16
申请号：US108287
申请日：1987-10-13
申请人： Donald Brunnett , Ashok K. Desai
发明人： Donald Brunnett , Ashok K. Desai
IPC分类号： G11B21/08 , G11B21/10
CPC分类号： G11B21/083 , G11B21/106
摘要： A method and apparatus for originally recording servo information on a disk surface. The apparatus comprises a servo writer assembly which includes an optical encoder having a movable input member and means for producing an output signal which indicates small uniform units of movement of said input member. The servo writer assembly is detachably mounted to a disk storage system with the optical encoder input member tightly physically coupled to the head arm of the storage system head disk assembly. During servo writing, the optical encoder output signal is connected in a closed servo loop with the head positioner motor so that the positioner motor can then be operated to precisely radially increment the servo head, track by track, over the disk servo surface.
摘要翻译：一种用于在磁盘表面上原始记录伺服信息的方法和装置。该装置包括伺服写入器组件，其包括具有可移动输入构件的光学编码器和用于产生指示所述输入构件的小均匀移动单位的输出信号的装置。伺服写入器组件可拆卸地安装到磁盘存储系统，光学编码器输入构件紧密地物理耦合到存储系统磁头盘组件的磁头臂。在伺服写入期间，光学编码器输出信号与磁头定位器电动机的闭合伺服环路连接，使得定位器电机可以随后被操作，以便通过磁盘伺服表面沿轨道精确径向增加伺服磁头。

7. 发明授权

US08508881B1 Disk drive employing system inversion for tuning seek to settle servo loop 有权
标题翻译：采用系统反转的磁盘驱动器进行调谐寻求稳定伺服环路
公开(公告)号：US08508881B1
公开(公告)日：2013-08-13
申请号：US13117036
申请日：2011-05-26
申请人： Alexander Babinski , Orhan Beker , Duc T. Phan , Donald Brunnett
发明人： Alexander Babinski , Orhan Beker , Duc T. Phan , Donald Brunnett
IPC分类号： G11B5/596
CPC分类号： G11B5/5547
摘要： A method is disclosed of operating a disk drive, the disk drive comprising a disk having a plurality of tracks, a head, and a closed loop servo system comprising a seek servo loop and a settle servo loop for actuating the head over the disk. The seek servo loop is used to seek the head toward a target track. When the head approaches the target track, the settle servo loop is used to settle the head on the target track in response to a reference signal generated in response to a system inversion of the settle servo loop.
摘要翻译：公开了一种操作磁盘驱动器的方法，该磁盘驱动器包括具有多个轨道的磁盘，磁头和闭环伺服系统，该伺服系统包括寻道伺服回路和用于在盘上致动磁头的稳定伺服回路。寻道伺服回路用于朝向目标轨道寻找头部。当头部接近目标轨迹时，响应于响应于稳定伺服环路的系统反转而产生的参考信号，使用稳定伺服环路在目标轨迹上安置磁头。

8. 发明授权

US08767343B1 Disk drive increasing integrator output range to complete seek operation 有权
标题翻译：磁盘驱动器增加积分器输出范围，完成查找操作
公开(公告)号：US08767343B1
公开(公告)日：2014-07-01
申请号：US13454752
申请日：2012-04-24
申请人： Daniel L. Helmick , Donald Brunnett , Aswartha Narayana , Duc T. Phan
发明人： Daniel L. Helmick , Donald Brunnett , Aswartha Narayana , Duc T. Phan
IPC分类号： G11B5/596
CPC分类号： G11B5/5547
摘要： A disk drive is disclosed comprising a disk comprising a plurality of data tracks, a head, and control circuitry comprising a servo control system operable to actuate the head over the disk. When an access command is received to access a target data track, a seek operation is initiated to seek the head toward the target data track, wherein the seek operation includes integrating a first state of the servo control system and limiting an output range of the integrating. The output range of the integrating is increased during the seek operation, for example, if an error occurs during the seek operation.
摘要翻译：公开了一种磁盘驱动器，包括包括多个数据磁道的磁盘，磁头和控制电路，其包括可操作以使磁头在盘上起动的伺服控制系统。当接收到访问目标数据轨道的访问命令时，启动搜索操作以朝向目标数据轨道寻找头，其中寻道操作包括对伺服控制系统的第一状态进行积分并限制积分的输出范围。在搜索操作期间积分的输出范围增加，例如，如果在搜索操作期间发生错误。

9. 发明授权

US07345837B1 Disk drive that refreshes data on portions of a disk based on a number of write operations thereto 有权
标题翻译：磁盘驱动器，其基于对其的写入操作的数量来刷新磁盘的部分上的数据
公开(公告)号：US07345837B1
公开(公告)日：2008-03-18
申请号：US11184273
申请日：2005-07-19
申请人： Erhard Schreck , Donald Brunnett , Hung V. Nguyen , Bruce Schardt , Andrew Vogan
发明人： Erhard Schreck , Donald Brunnett , Hung V. Nguyen , Bruce Schardt , Andrew Vogan
IPC分类号： G11B27/36 , G11B5/09
CPC分类号： G11B5/09
摘要： A disk drive includes a rotatable data storage disk, a transducer, an actuator, and a controller. The transducer is configured to read and write data on the disk. The actuator is configured to position the transducer relative to defined portions of the disk. The controller is configured to determine how many times data has been written to the defined portions of the disk. The controller is also configured to refresh data residing at a particular one of the defined portions of the disk when the number of times data has been written to the particular defined portion of the disk satisfies a threshold value.
摘要翻译：磁盘驱动器包括可旋转数据存储盘，换能器，致动器和控制器。传感器配置为在磁盘上读取和写入数据。致动器被配置成相对于盘的限定部分定位换能器。控制器被配置为确定数据被写入磁盘的定义部分的次数。当数据已被写入盘的特定定义部分的次数满足阈值时，控制器还被配置为刷新驻留在盘的特定一个定义部分的数据。

10. 发明授权

US07154700B1 Disk drive that stores time varying characteristics thereof with data from a host device and associated methods 有权
标题翻译：磁盘驱动器，其存储来自主机设备的数据及其相关方法的时变特性
公开(公告)号：US07154700B1
公开(公告)日：2006-12-26
申请号：US11042931
申请日：2005-01-25
申请人： Erhard Schreck , Donald Brunnett , Nick Warner , John Mead
发明人： Erhard Schreck , Donald Brunnett , Nick Warner , John Mead
IPC分类号： G11B5/596
CPC分类号： G11B5/59688 , G11B5/40 , G11B5/6011 , G11B2005/0013
摘要： A disk drive includes a rotatable data storage disk, a transducer, and a controller. The transducer is configured to write data on the disk. The controller is configured to receive data from a host device, to measure at least one parameter that is indicative of a time varying characteristic associated with the disk drive, and to write the measured parameter and the data on the disk through the transducer. The time varying characteristic that is measured may include temperature, air pressure, flying height of the transducer relative to the disk, and/or a position error signal (PES) that is indicative of a radial location of the transducer relative to a desired location along a track on the disk. The measured parameters may be embedded within the data that is written on the disk, they may be written in a same track and/or sector as the data, and/or they may be written on a reserved portion of the disk.
摘要翻译：磁盘驱动器包括可旋转数据存储盘，换能器和控制器。传感器配置为在磁盘上写入数据。控制器被配置为从主机设备接收数据，以测量指示与盘驱动器相关联的时变特性的至少一个参数，以及通过换能器将测量的参数和数据写入盘上。所测量的时变特性可包括温度，空气压力，传感器相对于盘的飞行高度，和/或位置误差信号（PES），其指示换能器相对于期望位置的径向位置磁盘上的轨道。测量的参数可以嵌入在写入磁盘的数据中，它们可以写入与数据相同的轨道和/或扇区，和/或它们可以写在盘的保留部分上。

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