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1. 发明授权

US08665545B2 Shingled magnetic recording (SMR) disk drive with verification of written data 有权
标题翻译：带有磁盘记录（SMR）的磁盘驱动器，具有写入数据的验证
公开(公告)号：US08665545B2
公开(公告)日：2014-03-04
申请号：US13316629
申请日：2011-12-12
申请人： Jonathan Darrel Coker , Martin Aureliano Hassner , Kirk Hwang , Bruce Alexander Wilson , Roger William Wood
发明人： Jonathan Darrel Coker , Martin Aureliano Hassner , Kirk Hwang , Bruce Alexander Wilson , Roger William Wood
IPC分类号： G11B5/09 , G11B27/36
CPC分类号： G11B19/045
摘要： A “write-squeeze-verify” method is used for verification of the data that has been written in the annular bands of a shingled magnetic recording disk drive. The writing of data along a track overwrites a portion of the previously written track and thus “squeezes” the data of the previously written track to thereby form a “shingled data track” (SDT). The data in each SDT is read back and verified by an error correction check using error correction bits associated with the data written in the SDT, or by comparing the readback data with the data stored in memory. If the data read back is not verified, a write error counter is incremented and a write error frequency is calculated. One or more attempts to write the data can be performed. If the data in the SDT cannot be verified after the attempted rewrite(s), then a “re-try fail” is reported.
摘要翻译： “写挤压验证”方法用于验证已写入带状磁记录磁盘驱动器的环形带中的数据。沿着轨道的数据写入将覆盖先前写入的轨道的一部分，从而“挤压”先前写入的轨道的数据，从而形成“带状数据轨道”（SDT）。每个SDT中的数据通过使用与写入SDT的数据相关联的纠错位的纠错检查来读取和验证，或通过将回读数据与存储在存储器中的数据进行比较。如果数据回读未被验证，则写入错误计数器递增，并计算写入错误频率。可以执行一个或多个写入数据的尝试。如果在尝试重写后无法验证SDT中的数据，则会报告“重试失败”。

2. 发明申请

US20130148225A1 SHINGLED MAGNETIC RECORDING (SMR) DISK DRIVE WITH VERIFICATION OF WRITTEN DATA 有权
标题翻译：磁带录音（SMR）磁带驱动器，具有书面数据验证功能
公开(公告)号：US20130148225A1
公开(公告)日：2013-06-13
申请号：US13316629
申请日：2011-12-12
申请人： Jonathan Darrel Coker , Martin Aureliano Hassner , Kirk Hwang , Bruce Alexander Wilson , Roger William Wood
发明人： Jonathan Darrel Coker , Martin Aureliano Hassner , Kirk Hwang , Bruce Alexander Wilson , Roger William Wood
IPC分类号： G11B27/36
CPC分类号： G11B19/045
摘要： A “write-squeeze-verify” method is used for verification of the data that has been written in the annular bands of a shingled magnetic recording disk drive. The writing of data along a track overwrites a portion of the previously written track and thus “squeezes” the data of the previously written track to thereby form a “shingled data track” (SDT). The data in each SDT is read back and verified by performing an error correction check using error correction bits associated with the data written in the SDT, or by comparing the readback data with the data stored in memory. If the data read back is not verified, a write error counter is incremented and a write error frequency is calculated. One or more attempts to write the data can be performed. If the data in the SDT cannot be verified after the attempted rewrite(s), then a “re-try fail” is reported.
摘要翻译： “写挤压验证”方法用于验证已写入带状磁记录磁盘驱动器的环形带中的数据。沿着轨道的数据写入将覆盖先前写入的轨道的一部分，从而“挤压”先前写入的轨道的数据，从而形成“带状数据轨道”（SDT）。通过使用与写入SDT的数据相关联的纠错位执行纠错检查，或通过将回读数据与存储在存储器中的数据进行比较来读取并校验每个SDT中的数据。如果数据回读未被验证，则写入错误计数器递增，并计算写入错误频率。可以执行一个或多个写入数据的尝试。如果在尝试重写后无法验证SDT中的数据，则会报告“重试失败”。

3. 发明授权

US07961416B2 Using readback signals to estimate radial location on a rotating storage device 有权
标题翻译：使用回读信号来估计旋转存储设备上的径向位置
公开(公告)号：US07961416B2
公开(公告)日：2011-06-14
申请号：US12539087
申请日：2009-08-11
申请人： Roger William Wood , Jonathan Darrel Coker
发明人： Roger William Wood , Jonathan Darrel Coker
IPC分类号： G11B5/09 , G11B21/02 , G11B5/596
CPC分类号： G11B5/09 , G11B5/59616
摘要： Approaches for estimating the operating radius of a head in a hard-disk drive. These approaches may be used in a constant or approximately constant density servo scheme. Statistics, which describe the proportion of high frequency values to low frequency values in a readback signal read by the read/write head of a persistent storage medium, such as a hard-disk drive (HDD), are maintained. An estimated location for the read/write head using the statistics is determined. The estimated location may be expressed as an estimated operating radius, which is an estimated distance from the center of the magnetic-recording medium to a current position of the read/write head. Based on the estimated location of the read/write head, an estimated clock frequency for a readback channel to use in reading the servo data stored on the magnetic recording medium is determined. The readback channel reads the servo data using the estimated clock frequency.
摘要翻译：估计硬盘驱动器中磁头运行半径的方法。这些方法可以以恒定或近似恒定的密度伺服方案使用。描述了由诸如硬盘驱动器（HDD）的持久存储介质的读/写头读取的回读信号中的高频值与低频值的比例的统计。确定使用统计信息的读/写头的估计位置。估计的位置可以表示为估计的操作半径，其是从磁记录介质的中心到读/写头的当前位置的估计距离。基于读/写头的估计位置，确定用于读取存储在磁记录介质上的伺服数据的回读通道的估计时钟频率。回读通道使用估计的时钟频率读取伺服数据。

4. 发明申请

US20110038073A1 Using Readback Signals to Estimate Radial Location on a Rotating Storage Device 有权
标题翻译：使用回读信号来估计旋转存储设备上的径向位置
公开(公告)号：US20110038073A1
公开(公告)日：2011-02-17
申请号：US12539087
申请日：2009-08-11
申请人： Roger William Wood , Jonathan Darrel Coker
发明人： Roger William Wood , Jonathan Darrel Coker
IPC分类号： G11B5/09
CPC分类号： G11B5/09 , G11B5/59616
摘要： Approaches for estimating the operating radius of a head in a hard-disk drive. These approaches may be used in a constant or approximately constant density servo scheme. Statistics, which describe the proportion of high frequency values to low frequency values in a readback signal read by the read/write head of a persistent storage medium, such as a hard-disk drive (HDD), are maintained. An estimated location for the read/write head using the statistics is determined. The estimated location may be expressed as an estimated operating radius, which is an estimated distance from the center of the magnetic-recording medium to a current position of the read/write head. Based on the estimated location of the read/write head, an estimated clock frequency for a readback channel to use in reading the servo data stored on the magnetic recording medium is determined. The readback channel reads the servo data using the estimated clock frequency.
摘要翻译：估计硬盘驱动器中磁头运行半径的方法。这些方法可以以恒定或近似恒定的密度伺服方案使用。描述了由诸如硬盘驱动器（HDD）的持久存储介质的读/写头读取的回读信号中的高频值与低频值的比例的统计。确定使用统计信息的读/写头的估计位置。估计的位置可以表示为估计的操作半径，其是从磁记录介质的中心到读/写头的当前位置的估计距离。基于读/写头的估计位置，确定用于读取存储在磁记录介质上的伺服数据的回读通道的估计时钟频率。回读通道使用估计的时钟频率读取伺服数据。

5. 发明申请

US20140036381A1 IMPLEMENTING TRACK FOLLOWING USING DATA CHARACTERISTICS FOR POSITIONAL INFORMATION 有权
标题翻译：使用数据特征实现位置信息的跟踪
公开(公告)号：US20140036381A1
公开(公告)日：2014-02-06
申请号：US13566772
申请日：2012-08-03
申请人： Richard Michael Brockie , Richard Leo Galbraith , Petrus Antonius Van Der Heijden , Roger William Wood
发明人： Richard Michael Brockie , Richard Leo Galbraith , Petrus Antonius Van Der Heijden , Roger William Wood
IPC分类号： G11B5/09
CPC分类号： G11B5/59644 , G11B5/012 , G11B5/5582 , G11B5/59627 , G11B20/10009
摘要： A method, apparatus and a data storage device are provided for implementing track following and data recovery with readback of shingled data written in overlapping shingled data tracks on a recordable surface of a storage device. Positional information is identified with data readback of shingled data written in overlapping shingled data tracks. The identified positional information is used to selectively modify at least one predefined channel parameter, for example, to provide enhanced track following and enhanced data recovery.
摘要翻译：提供了一种方法，装置和数据存储装置，用于通过对存储装置的可记录表面上的重叠带状数据轨迹中写入的带状数据进行回读来实现跟踪跟踪和数据恢复。使用以重叠的带状数据轨道写入的带状数据的数据回读来识别位置信息。所识别的位置信息用于选择性地修改至少一个预定义的信道参数，例如，以提供增强的跟踪跟踪和增强的数据恢复。

6. 发明授权

US08902534B2 Implementing track following using data characteristics for positional information 有权
标题翻译：使用位置信息的数据特征实现跟踪
公开(公告)号：US08902534B2
公开(公告)日：2014-12-02
申请号：US13566772
申请日：2012-08-03
申请人： Richard Michael Brockie , Richard Leo Galbraith , Petrus Antonius Van Der Heijden , Roger William Wood
发明人： Richard Michael Brockie , Richard Leo Galbraith , Petrus Antonius Van Der Heijden , Roger William Wood
IPC分类号： G11B21/02
CPC分类号： G11B5/59644 , G11B5/012 , G11B5/5582 , G11B5/59627 , G11B20/10009
摘要： A method, apparatus and a data storage device are provided for implementing track following and data recovery with readback of shingled data written in overlapping shingled data tracks on a recordable surface of a storage device. Positional information is identified with data readback of shingled data written in overlapping shingled data tracks. The identified positional information is used to selectively modify at least one predefined channel parameter, for example, to provide enhanced track following and enhanced data recovery.
摘要翻译：提供了一种方法，装置和数据存储装置，用于通过对存储装置的可记录表面上的重叠带状数据轨迹中写入的带状数据进行回读来实现跟踪跟踪和数据恢复。使用以重叠的带状数据轨道写入的带状数据的数据回读来识别位置信息。所识别的位置信息用于选择性地修改至少一个预定义的信道参数，例如，以提供增强的跟踪跟踪和增强的数据恢复。

7. 发明授权

US08094403B2 Correcting errors in position of an HDD write-head 有权
标题翻译：纠正HDD写入头位置的错误
公开(公告)号：US08094403B2
公开(公告)日：2012-01-10
申请号：US12435220
申请日：2009-05-04
申请人： Roger William Wood , James Terrence Olson , Zhen Jin , Michael Paul Salo
发明人： Roger William Wood , James Terrence Olson , Zhen Jin , Michael Paul Salo
IPC分类号： G11B21/02
CPC分类号： G11B5/012 , G11B5/5552 , G11B5/6005 , G11B5/6064 , G11B2005/001 , G11B2005/0021
摘要： A hard-disk drive (HDD) with a current adjustment component is provided. The current adjustment component changes an amount of current to a magnetic-recording head of the HDD to cause a change in the strength of a magnetic write field produced by the magnetic-recording head in response to a determination that a present position of the magnetic-head head is not in a desired position. To illustrate, in response to a determination that the present position of the magnetic-recording head is further away from an edge of a current track being written than a desired position of the magnetic-recording head, the current adjustment component increases the current to the magnetic-recording head to cause an increase in the strength of the magnetic write field. The change in the strength of the magnetic write field causes data, written by the magnetic-recording head, to be located at a desired location on the magnetic-recording disk.
摘要翻译：提供带有电流调节组件的硬盘驱动器（HDD）。电流调节部件将电流量改变到HDD的磁记录头，以响应于确定磁记录头的当前位置而导致磁记录头产生的磁写入场强度的变化，头部头部不在期望的位置。为了说明，响应于确定磁记录头的当前位置比正在写入的当前轨道的边缘比磁记录头的期望位置更远，则电流调节组件将电流增加到磁记录头导致磁写字段的强度增加。磁性写入场强度的变化导致由磁记录头写入的数据位于磁记录盘上的所需位置。

8. 发明申请

US20100277827A1 Correcting Errors in Position of an HDD Write-Head 有权
标题翻译：纠正HDD写入头位置的错误
公开(公告)号：US20100277827A1
公开(公告)日：2010-11-04
申请号：US12435220
申请日：2009-05-04
申请人： Roger William Wood , James Terrence Olson , Zhen Jin , Michael Paul Salo
发明人： Roger William Wood , James Terrence Olson , Zhen Jin , Michael Paul Salo
IPC分类号： G11B21/02
CPC分类号： G11B5/012 , G11B5/5552 , G11B5/6005 , G11B5/6064 , G11B2005/001 , G11B2005/0021
摘要： A hard-disk drive (HDD) with a current adjustment component is provided. The current adjustment component changes an amount of current to a magnetic-recording head of the HDD to cause a change in the strength of a magnetic write field produced by the magnetic-recording head in response to a determination that a present position of the magnetic-head head is not in a desired position. To illustrate, in response to a determination that the present position of the magnetic-recording head is further away from an edge of a current track being written than a desired position of the magnetic-recording head, the current adjustment component increases the current to the magnetic-recording head to cause an increase in the strength of the magnetic write field. The change in the strength of the magnetic write field causes data, written by the magnetic-recording head, to be located at a desired location on the magnetic-recording disk.
摘要翻译：提供带有电流调节组件的硬盘驱动器（HDD）。电流调节部件将电流量改变到HDD的磁记录头，以响应于确定磁记录头的当前位置而导致磁记录头产生的磁写入场强度的变化，头部头部不在期望的位置。为了说明，响应于确定磁记录头的当前位置比正在写入的当前轨道的边缘比磁记录头的期望位置更远，则电流调节组件将电流增加到磁记录头导致磁写字段的强度增加。磁性写入场强度的变化导致由磁记录头写入的数据位于磁记录盘上的所需位置。

9. 发明授权

US6104581A Dual coil rotary actuator 有权
标题翻译：双线圈旋转执行器
公开(公告)号：US6104581A
公开(公告)日：2000-08-15
申请号：US167127
申请日：1998-10-05
申请人： Fu-Ying Huang , Wayne Isami Imaino , Jiann-Chang Lo , Roger William Wood
发明人： Fu-Ying Huang , Wayne Isami Imaino , Jiann-Chang Lo , Roger William Wood
IPC分类号： G11B21/02 , G11B5/48 , G11B5/55 , G11B21/08
CPC分类号： G11B5/5521 , G11B5/4806
摘要： An actuator assembly having two coils disposed between the poles of a voice coil motor (VCM) magnet for improved dynamic performance during settling and tracking operations in a disk drive. The two coils in the VCM are connected to separate current sources to allow the current flow in the two coils to have the same sense (clockwise or counterclockwise) or the opposite sense with respect to each other. When the current flows in the two coils have the opposite sense, excitation of the principal in-plane bending mode resonance of the actuator assembly is suppressed allowing the use of an increased servo bandwidth for settling and tracking operations of the disk drive. During seek operations of the disk drive, where maximum torque on the actuator is desirable, the coil currents in the two coils are chosen to have the same sense so that the forces on the actuator from the two coils are additive.
摘要翻译：具有设置在音圈电机（VCM）磁体的极之间的两个线圈的致动器组件，用于在磁盘驱动器中的稳定和跟踪操作期间改善动态性能。 VCM中的两个线圈连接到单独的电流源，以允许两个线圈中的电流具有相同的感测（顺时针或逆时针）或相对于彼此的相反感。当两个线圈中的电流流动具有相反的感觉时，致动器组件的主要的平面内弯曲模式谐振的激励被抑制，从而可以使用增加的伺服带宽来进行磁盘驱动器的稳定和跟踪操作。在磁盘驱动器的寻道操作期间，在执行器上的最大扭矩是期望的，两个线圈中的线圈电流被选择为具有相同的感测，使得来自两个线圈的致动器上的力是相加的。

10. 发明授权

US07639450B2 Flux shunt structure for reducing return pole corner fields in a perpendicular magnetic recording head 有权
标题翻译：用于减小垂直磁记录头中返回极角场的磁通分流结构
公开(公告)号：US07639450B2
公开(公告)日：2009-12-29
申请号：US11116677
申请日：2005-04-27
申请人： Yimin Hsu , Quang Le , Roger William Wood
发明人： Yimin Hsu , Quang Le , Roger William Wood
IPC分类号： G11B5/127
CPC分类号： G11B5/315 , G11B5/1278 , G11B5/3116 , G11B5/3146
摘要： A magnetic head for use in a perpendicular recording system having a novel shield structure that provides exceptional magnetic shielding from extraneous magnetic fields such as from a write coil, shaping layer or return pole of the write head. The magnetic head includes a write pole, a return pole and a magnetic shield that is magnetically connected with the return pole near the ABS and extends toward the write pole. The shield is formed with a notch at its edge closest to the write pole. The notch assures adequate physical, magnetic, and electrical separation between the write pole and the shield, while allowing un-notched portions of the shield to provide additional magnetic shielding.
摘要翻译：一种用于垂直记录系统的磁头，其具有新的屏蔽结构，其提供例如来自写入磁头的写入线圈，成形层或返回磁极的外部磁场的卓越的磁屏蔽。磁头包括写入极，返回极和磁屏蔽，其与ABS附近的返回极磁性连接，并朝向写入极延伸。屏蔽件在其最靠近写入极的边缘处形成有凹口。凹口确保写磁极和屏蔽之间的充分的物理，磁性和电气分离，同时允许屏蔽层的未切口部分提供额外的磁屏蔽。

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