公开(公告)号：US08363348B2

公开(公告)日：2013-01-29

申请号：US12924880

申请日：2010-10-07

申请人： Toshiki Hirano ,  Jeffrey S. Lille ,  Tetsuo Semba

发明人： Toshiki Hirano ,  Jeffrey S. Lille ,  Tetsuo Semba

IPC分类号： G11B5/09 ,  G11B5/596

CPC分类号： G11B5/59655

摘要： Patterned magnetic media are described in which the servo sectors include at least two PES offset segments that can be used for the position error signal (PES) and identification of local track position. The two PES offset segments deviate from the track centerline in opposite directions. The lengths of the offset PES offset segments are systematically varied in a repeating pattern to provide a unique servo signal pattern for each track in a local group of adjacent tracks. The locally unique servo sector pattern allows the servo system to use the pattern of the signals generated from the offset and non-offset segments to determine the local track position, which is similar to information provided by the low order Gray code bits in prior art designs. Therefore, the number of bits in the track ID code can be reduced.

摘要翻译： 描述了图形磁介质，其中伺服扇区包括可用于位置误差信号（PES）和识别本地轨道位置的至少两个PES偏移段。 两个PES偏移片段在相反方向偏离轨道中心线。 偏移PES偏移段的长度以重复模式系统地改变，以为本地相邻轨道组中的每个轨道提供唯一的伺服信号模式。 本地唯一的伺服扇区模式允许伺服系统使用从偏移和非偏移段产生的信号的模式来确定本地轨道位置，其类似于现有技术设计中的低阶格雷码位提供的信息 。 因此，可以减少轨道ID码中的比特数。

公开(公告)号：US20120087037A1

公开(公告)日：2012-04-12

申请号：US12924880

申请日：2010-10-07

申请人： Toshiki Hirano ,  Jeffrey S. Lille ,  Tetsuo Semba

发明人： Toshiki Hirano ,  Jeffrey S. Lille ,  Tetsuo Semba

IPC分类号： G11B5/596

CPC分类号： G11B5/59655

摘要： Patterned magnetic media are described in which the servo sectors include at least two PES offset segments that can be used for the position error signal (PES) and identification of local track position. The two PES offset segments deviate from the track centerline in opposite directions. The lengths of the offset PES offset segments are systematically varied in a repeating pattern to provide a unique servo signal pattern for each track in a local group of adjacent tracks. The locally unique servo sector pattern allows the servo system to use the pattern of the signals generated from the offset and non-offset segments to determine the local track position, which is similar to information provided by the low order Gray code bits in prior art designs. Therefore, the number of bits in the track ID code can be reduced.

摘要翻译： 描述了图形磁介质，其中伺服扇区包括可用于位置误差信号（PES）和识别本地轨道位置的至少两个PES偏移段。 两个PES偏移片段在相反方向偏离轨道中心线。 偏移PES偏移段的长度以重复模式系统地改变，以为本地相邻轨道组中的每个轨道提供唯一的伺服信号模式。 本地唯一的伺服扇区模式允许伺服系统使用从偏移和非偏移段产生的信号的模式来确定本地轨道位置，其类似于现有技术设计中的低阶格雷码位提供的信息 。 因此，可以减少轨道ID码中的比特数。

公开(公告)号：US08724248B2

公开(公告)日：2014-05-13

申请号：US13306736

申请日：2011-11-29

申请人： Abhishek Dhanda ,  Toshiki Hirano ,  Tetsuo Semba ,  Zvonimir Z. Bandic

发明人： Abhishek Dhanda ,  Toshiki Hirano ,  Tetsuo Semba ,  Zvonimir Z. Bandic

IPC分类号： G11B21/02

CPC分类号： G11B5/59627 ,  G11B5/59694 ,  G11B20/1217 ,  G11B2020/1228 ,  G11B2020/1238 ,  G11B2220/2516

摘要： A method, apparatus and a data storage device are provided for implementing data track pitch adjustment for data written on a recordable surface of a storage device under operational vibration conditions. An operational vibration disturbance spectrum is detected during a write operation and the data track pitch is selectively adjusted based on the detected operational vibration disturbance spectrum. The adjusted track pitch information is saved and used during a read operation.

摘要翻译： 提供了一种方法，装置和数据存储装置，用于在操作的振动条件下为存储装置的可记录表面上写入的数据实现数据轨道间距调整。 在写入操作期间检测到操作的振动干扰频谱，并且基于检测到的操作振动干扰谱选择性地调整数据轨道间距。 调整后的音高信息在读取操作期间被保存和使用。

公开(公告)号：US08665549B2

公开(公告)日：2014-03-04

申请号：US13249041

申请日：2011-09-29

申请人： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

发明人： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

IPC分类号： G11B21/02 ,  G11B5/82

CPC分类号： G11B5/59688 ,  G11B5/59655

摘要： A magnetic data storage system having a magnetic disk having burst patterns for providing a position error signal (PES) wherein each magnetic burst pattern is offset from an adjacent burst pattern by ¼ track pitch. All of the magnetic bits of the burst patterns can be unipolar magnetized, and the bits of each burst pattern can be aligned with one another in radial and circumferential direction. The magnetic media can be a bit patterned media wherein the magnetic bits of the burst patterns are magnetically isolated portions separated by non-magnetic spaces or non-magnetic material.

摘要翻译： 一种磁数据存储系统，具有具有用于提供位置误差信号（PES）的脉冲串模式的磁盘，其中每个磁脉冲串模式从相邻脉冲串模式偏移1/4声道间距。 突发图案的所有磁位可以是单极磁化的，并且每个突发图案的位可以在径向和圆周方向上彼此对准。 磁介质可以是位图形介质，其中突发图案的磁位是被非磁性空间或非磁性材料隔开的磁隔离部分。

公开(公告)号：US07450335B2

公开(公告)日：2008-11-11

申请号：US11502069

申请日：2006-08-09

申请人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

发明人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

IPC分类号： G11B5/596

CPC分类号： G11B5/59627 ,  G11B5/6017

摘要： Methods and systems for reducing read/write head track misregistration are described. According to one embodiment, a first signal is received from a first capacitive sensor that faces a surface of a disk associated with a disk drive. A second signal is received from a second capacitive sensor that faces the surface of the disk. A determination is made as to whether the disk is being moved along its axis of rotation or whether the disk is tilting. Read/write head track misregistration is reduced based on the determination of whether the disk drive is being moved along an axis of rotation or whether the disk is tilting.

公开(公告)号：US07277258B2

公开(公告)日：2007-10-02

申请号：US11158445

申请日：2005-06-21

申请人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba ,  Matthew T. White

发明人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba ,  Matthew T. White

IPC分类号： G11B5/596 ,  G11B21/10 ,  G11B21/20

CPC分类号： G11B5/5552

摘要： A dual-stage actuator disk drive has both a rotary primary actuator and a rotary secondary actuator. When the primary actuator initiates a seek there are two torque components acting on the center of mass of the secondary actuator's moving portion. The center of rotation of the moving portion is located at an optimal location relative to the center of mass of the moving portion, which results in cancellation of the two torque components and a secondary actuator that has essentially no resonant frequency in response to a seek by the primary actuator. If the optimal location can not be achieved because of assembly tolerances, then the center of rotation is placed at a distance at least as great as the assembly tolerance from the optimal location.

摘要翻译： 双级致动器盘驱动器具有旋转主执行器和旋转次级致动器。 当主执行器启动寻道时，存在作用在辅助致动器的移动部分的质心的两个扭矩分量。 移动部分的旋转中心位于相对于移动部分的质心的最佳位置，这导致两个扭矩分量的消除，以及二次致动器，其基本上没有响应于寻道的共振频率 主执行器。 如果由于组装公差而无法实现最佳位置，则旋转中心的距离至少与最佳位置的组装公差一样大。

公开(公告)号：US08953266B2

公开(公告)日：2015-02-10

申请号：US13593991

申请日：2012-08-24

申请人： Abhishek Dhanda ,  Toshiki Hirano ,  Tetsuo Semba

发明人： Abhishek Dhanda ,  Toshiki Hirano ,  Tetsuo Semba

IPC分类号： G11B5/54

CPC分类号： G11B20/1252 ,  G11B5/09 ,  G11B5/5543 ,  G11B5/56 ,  G11B5/59694 ,  G11B2020/1238

摘要： A data storage device with improved data storage densities, coupled with lower hard error and write-inhibit events is described. A feed-forward write inhibit (FFWI) method enables data tracks to be written more densely. Alternatively, the FFWI method may reduce the hard error and write inhibit events to improve data storage performance. A concept of virtual tracks enables the FFWI method to be applied to the writing of circular data tracks with non-circular servo tracks, or to the writing of non-circular data tracks with PES data from circular servo tracks—in both cases, improvements to performance and/or storage densities are enabled. The FFWI method may also be applied to the case of both non-circular servo and data tracks.

摘要翻译： 描述了具有改进的数据存储密度以及更低的硬错误和禁止写入事件的数据存储设备。 前馈写禁止（FFWI）方法使数据轨道更加密集地写入。 或者，FFWI方法可以减少硬错误和写禁止事件以提高数据存储性能。 虚拟轨道的概念使得FFWI方法可以应用于用非圆形伺服轨迹写入圆形数据轨道，或者用于从圆形伺服轨迹写入具有PES数据的非圆形数据轨迹 - 在这两种情况下，改进 性能和/或存储密度启用。 FFWI方法也可以应用于非圆形伺服和数据轨道的情况。

公开(公告)号：US20130083420A1

公开(公告)日：2013-04-04

申请号：US13249041

申请日：2011-09-29

申请人： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

发明人： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

IPC分类号： G11B15/52 ,  G11B5/82

CPC分类号： G11B5/59688 ,  G11B5/59655

摘要： A magnetic data storage system having a magnetic disk having burst patterns for providing a position error signal (PES) wherein each magnetic burst pattern is offset from an adjacent burst pattern by ¼ track pitch. All of the magnetic bits of the burst patterns can be unipolar magnetized, and the bits of each burst pattern can be aligned with one another in radial and circumferential direction. The magnetic media can be a bit patterned media wherein the magnetic bits of the burst patterns are magnetically isolated portions separated by non-magnetic spaces or non-magnetic material.

摘要翻译： 一种磁数据存储系统，具有具有用于提供位置误差信号（PES）的脉冲串模式的磁盘，其中每个磁脉冲串模式从相邻脉冲串模式偏移1/4声道间距。 突发图案的所有磁位可以是单极磁化的，并且每个突发图案的位可以在径向和圆周方向上彼此对准。 磁介质可以是位图形介质，其中突发图案的磁位是被非磁性空间或非磁性材料隔开的磁隔离部分。

公开(公告)号：US07499243B2

公开(公告)日：2009-03-03

申请号：US11835309

申请日：2007-08-07

申请人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

发明人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

IPC分类号： G11B33/14

CPC分类号： G11B5/58 ,  G11B5/5582 ,  G11B5/596 ,  G11B33/08

摘要： A data recording disk drive has one or more capacitive sensors for sensing out-of-plane vibration of the disk or disks. The sensors are attached to a support structure that is attached to the disk drive housing. Each sensor is associated with a disk and faces a surface of the disk near the outer perimeter of the disk and close to the recording head. The support structure can be made of a metal or a high-strength plastic and can be a separate structure mounted to the housing, or integrated as part of the single-piece housing casting. If it is metallic, as would be the case if it were integrated with the housing, then layers of insulating material separate the sensors from the support structure. A support structure that serves other functions in the disk drive, such as a support for air dams that extend between the disks, can also function as the support structure for the capacitive sensors.

摘要翻译： 数据记录磁盘驱动器具有用于感测盘或盘的平面外振动的一个或多个电容传感器。 传感器连接到附接到磁盘驱动器外壳的支撑结构。 每个传感器与磁盘相关联并且面对靠近盘的外周边的盘的表面并且靠近记录头。 支撑结构可以由金属或高强度塑料制成，并且可以是安装到壳体的单独结构，或者作为单件式外壳铸件的一部分集成。 如果是金属的，如果将其与外壳结合在一起，则绝缘材料层将传感器与支撑结构分开。 用于磁盘驱动器中的其他功能的支撑结构（例如在盘之间延伸的气坝的支撑）也可以用作电容式传感器的支撑结构。

公开(公告)号：US20060285256A1

公开(公告)日：2006-12-21

申请号：US11158445

申请日：2005-06-21

申请人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba ,  Matthew White

发明人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba ,  Matthew White

IPC分类号： G11B5/56

CPC分类号： G11B5/5552

摘要： A dual-stage actuator disk drive has both a rotary primary actuator and a rotary secondary actuator. When the primary actuator initiates a seek there are two torque components acting on the center of mass of the secondary actuator's moving portion. The center of rotation of the moving portion is located at an optimal location relative to the center of mass of the moving portion, which results in cancellation of the two torque components and a secondary actuator that has essentially no resonant frequency in response to a seek by the primary actuator. If the optimal location can not be achieved because of assembly tolerances, then the center of rotation is placed at a distance at least as great as the assembly tolerance from the optimal location.

摘要翻译： 双级致动器盘驱动器具有旋转主执行器和旋转次级致动器。 当主执行器启动寻道时，存在作用在辅助致动器的移动部分的质心的两个扭矩分量。 移动部分的旋转中心位于相对于移动部分的质心的最佳位置，这导致两个扭矩分量的消除，以及二次致动器，其基本上没有响应于寻道的共振频率 主执行器。 如果由于组装公差而无法实现最佳位置，则旋转中心的距离至少与最佳位置的组装公差一样大。