公开(公告)号：US20090009904A1

公开(公告)日：2009-01-08

申请号：US12215260

申请日：2008-06-25

申请人： Kei Yasuna ,  Kohji Takasaki ,  Fuminori Sai ,  Makoto Takase ,  Tomoyuki Oyama

发明人： Kei Yasuna ,  Kohji Takasaki ,  Fuminori Sai ,  Makoto Takase ,  Tomoyuki Oyama

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59666

摘要： Embodiments of the present invention provide a method of forming an initial servo-pattern for self servowrite, insusceptible to constraints of an output resolution of a driver circuit for driving an actuator, and a dynamic range. According to one embodiment, a cluster pattern made up of pattern blocks, each including a burst pattern, is written by use of a write element by pressing a head-support mechanism to a crash-stop, and a pattern block is newly written with a read element in states of being positioned at an inner peripheral side edge of the cluster pattern, an outer peripheral side edge thereof, and the center of two burst patterns included in the cluster pattern, respectively, thereby increasing a width of the cluster patterns in stages, so that an initial servo pattern for use in a propagation action is formed.

摘要翻译： 本发明的实施例提供了一种形成用于自伺服驱动的初始伺服模式的方法，其不受用于驱动致动器的驱动器电路的输出分辨率的约束和动态范围的影响。 根据一个实施例，通过将头部支撑机构按压到紧急停止，使用写入元件来写入由图案块构成的每个包括突发图案的簇图案，并且新的图案块用 读取元件分别位于簇图案的内周侧边缘，其外周侧边缘和包括在簇图案中的两个突发图案的中心，从而分级地增加簇图案的宽度 ，从而形成用于传播动作的初始伺服模式。

公开(公告)号：US07646561B2

公开(公告)日：2010-01-12

申请号：US11895322

申请日：2007-08-23

申请人： Kohji Takasaki ,  Fuminori Sai ,  Kei Yasuna ,  Tomoyuki Oyama ,  Satoshi Yamamoto

发明人： Kohji Takasaki ,  Fuminori Sai ,  Kei Yasuna ,  Tomoyuki Oyama ,  Satoshi Yamamoto

IPC分类号： G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59666

摘要： Embodiments of the present invention efficiently perform servo correction for prevention of propagation of a position error in a radial direction in self servo write (SSW). According to one embodiment, in SSW, a target position of a reference track TO in writing a servo write track TN is corrected. The target position is represented as a target value of a position signal calculated from a signal read by a read element. A signal indicating a deviation (a position error) from the target position (the target value) is referred to as PES. The SSW in this example performs correction of target positions in respective tracks using an impulse response of a servo system. Consequently, it is possible to efficiently and effectively prevent the propagation of position error in the SSW.

摘要翻译： 本发明的实施例有效地进行伺服校正，以防止自伺服写入（SSW）中径向位置误差的传播。 根据一个实施例，在SSW中，校正写入伺服写磁道TN的参考磁道TO的目标位置。 目标位置被表示为根据由读取元件读取的信号计算出的位置信号的目标值。 指示与目标位置（目标值）的偏差（位置误差）的信号被称为PES。 该示例中的SSW使用伺服系统的脉冲响应来执行各轨道中的目标位置的校正。 因此，可有效且有效地防止SSW中的位置误差的传播。

公开(公告)号：US20080068741A1

公开(公告)日：2008-03-20

申请号：US11895322

申请日：2007-08-23

申请人： Kohji Takasaki ,  Fuminori Sai ,  Kei Yasuna ,  Tomoyuki Oyama ,  Satoshi Yamamoto

发明人： Kohji Takasaki ,  Fuminori Sai ,  Kei Yasuna ,  Tomoyuki Oyama ,  Satoshi Yamamoto

IPC分类号： G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59666

摘要： Embodiments of the present invention efficiently perform servo correction for prevention of propagation of a position error in a radial direction in self servo write (SSW). According to one embodiment, in SSW, a target position of a reference track TO in writing a servo write track TN is corrected. The target position is represented as a target value of a position signal calculated from a signal read by a read element. A signal indicating a deviation (a position error) from the target position (the target value) is referred to as PES. The SSW in this example performs correction of target positions in respective tracks using an impulse response of a servo system. Consequently, it is possible to efficiently and effectively prevent the propagation of position error in the SSW.

摘要翻译： 本发明的实施例有效地进行伺服校正，以防止自伺服写入（SSW）中径向位置误差的传播。 根据一个实施例，在SSW中，校正写入伺服写磁道TN的参考磁道TO的目标位置。 目标位置被表示为根据由读取元件读取的信号计算出的位置信号的目标值。 指示与目标位置（目标值）的偏差（位置误差）的信号被称为PES。 该示例中的SSW使用伺服系统的脉冲响应来执行各轨道中的目标位置的校正。 因此，可有效且有效地防止SSW中的位置误差的传播。

公开(公告)号：US20070121235A1

公开(公告)日：2007-05-31

申请号：US11605649

申请日：2006-11-28

申请人： Fuminori Sai ,  Makoto Takase ,  Kohji Takasaki ,  Hiroshi Yanagisawa

发明人： Fuminori Sai ,  Makoto Takase ,  Kohji Takasaki ,  Hiroshi Yanagisawa

IPC分类号： G11B5/09 ,  G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59666

摘要： Embodiments in accordance with the present invention relate to suppressing effects of the rotational jitter of a rotating medium during self-writing of patterns on the medium. In one embodiment, patterns are written on a track TE first. While a clock frequency is modulated using the difference between the readout time and target time of each pattern PE on the track TE, patterns PF are written on a track TF after a calculated delay time from the readout of each pattern PE. During pattern writing on the track TF, any timing errors of the patterns PE are stored into memory. While the target time for each pattern PF on the track TF is being corrected using the stored timing errors of the patterns PE and the clock frequency is being modulated using the difference between the readout time and corrected target time of each pattern PF, patterns PG are written on a track TG after a calculated delay time from the readout of each pattern PF.

摘要翻译： 根据本发明的实施例涉及在图案自写入介质时抑制旋转介质的旋转抖动的影响。 在一个实施例中，模式首先写在轨道TE上。 在使用轨道TE上的每个图案PE的读出时间和目标时间之间的差来调制时钟频率的情况下，在从每个图案PE的读出计算的延迟时间之后，在轨道TF上写入图案PF。 在轨道TF上的模式写入期间，模式PE的任何定时错误都被存储到存储器中。 虽然使用存储的图案PE的定时误差来校正轨道TF上的每个图案PF的目标时间，并且使用每个图案PF的读出时间和校正的目标时间之间的差来调制时钟频率，但是图案PG是 在从每个图案PF的读出计算的延迟时间之后，在轨道TG上写入。

公开(公告)号：US07486467B2

公开(公告)日：2009-02-03

申请号：US11605649

申请日：2006-11-28

申请人： Fuminori Sai ,  Makoto Takase ,  Kohji Takasaki ,  Hiroshi Yanagisawa

发明人： Fuminori Sai ,  Makoto Takase ,  Kohji Takasaki ,  Hiroshi Yanagisawa

IPC分类号： G11B21/12

CPC分类号： G11B5/59633 ,  G11B5/59666

摘要： Embodiments in accordance with the present invention relate to suppressing effects of the rotational jitter of a rotating medium during self-writing of patterns on the medium. In one embodiment, patterns are written on a track TE first. While a clock frequency is modulated using the difference between the readout time and target time of each pattern PE on the track TE, patterns PF are written on a track TF after a calculated delay time from the readout of each pattern PE. During pattern writing on the track TF, any timing errors of the patterns PE are stored into memory. While the target time for each pattern PF on the track TF is being corrected using the stored timing errors of the patterns PE and the clock frequency is being modulated using the difference between the readout time and corrected target time of each pattern PF, patterns PG are written on a track TG after a calculated delay time from the readout of each pattern PF.

摘要翻译： 根据本发明的实施例涉及在图案自写入介质时抑制旋转介质的旋转抖动的影响。 在一个实施例中，模式首先写在轨道TE上。 在使用轨道TE上的每个图案PE的读出时间和目标时间之间的差来调制时钟频率的情况下，在从每个图案PE的读出计算的延迟时间之后，在轨道TF上写入图案PF。 在轨道TF上的模式写入期间，模式PE的任何定时错误都被存储到存储器中。 虽然使用存储的图案PE的定时误差来校正轨道TF上的每个图案PF的目标时间，并且使用每个图案PF的读出时间和校正的目标时间之间的差来调制时钟频率，但是图案PG是 在从每个图案PF的读出计算的延迟时间之后，在轨道TG上写入。

公开(公告)号：US07286316B2

公开(公告)日：2007-10-23

申请号：US11437552

申请日：2006-05-19

申请人： Fuminori Sai ,  Yutaka Ozawa ,  Kohji Takasaki ,  Hiroshi Yanagisawa ,  Satoshi Yamamoto

发明人： Fuminori Sai ,  Yutaka Ozawa ,  Kohji Takasaki ,  Hiroshi Yanagisawa ,  Satoshi Yamamoto

IPC分类号： G11B21/02 ,  G11B5/596 ,  G11B5/55

CPC分类号： G11B5/59633

摘要： Embodiments of the invention efficiently conduct servo corrections for preventing error propagation during SSW. In an example of the present invention, a servo position signal generator generates a servo position signal indicative of the current position of a read element on the basis of a servo signal from a servo channel. A target position generator generates correction data from multiply and add operations between the PES generated when the track that the read element is following is written, and pre-registered correction coefficients. A correction target position is generated from the correction data and a reference target position, and then output to a position error calculator. The position error calculator generates a position error signal (PES) from the servo position signal and the target position signal, and outputs PES to a servo controller. The servo controller generates a control signal (DACOUT) in accordance with PES, and a motor driver unit supplies an electric current of a required value to a VCM in accordance with the control signal.

摘要翻译： 本发明的实施例有效地进行伺服校正，以防止SSW期间的错误传播。 在本发明的一个例子中，伺服位置信号发生器基于来自伺服通道的伺服信号产生指示读取元件的当前位置的伺服位置信号。 目标位置发生器在读取元件所追踪的轨迹被写入时产生的PES和预先登记的校正系数之间乘法生成校正数据并且在其之间添加操作。 从校正数据和参考目标位置产生校正目标位置，然后输出到位置误差计算器。 位置误差计算器从伺服位置信号和目标位置信号产生位置误差信号（PES），并将PES输出到伺服控制器。 伺服控制器根据PES生成控制信号（DACOUT），并且电动机驱动单元根据控制信号向VCM提供所需值的电流。

公开(公告)号：US20070247736A1

公开(公告)日：2007-10-25

申请号：US11788524

申请日：2007-04-19

申请人： Fuminori Sai ,  Kohji Takasaki ,  Yutaka Ozawa ,  Naoki Tajima

发明人： Fuminori Sai ,  Kohji Takasaki ,  Yutaka Ozawa ,  Naoki Tajima

IPC分类号： G11B5/09

CPC分类号： G11B5/59627 ,  G11B5/59688

摘要： Embodiments in accordance with the present invention suppress an adverse influence on a pattern of a magnetic disk due to its rotational jitter and write the pattern at more accurate timing. In accordance with one embodiment, a hard disk controller/microprocessing unit (HDC/MPU) controls a clock frequency of a data clock generation circuit so that a rotational jitter of the magnetic disk be compensated when writing and reading user data. The HDC/MPU expects a detection timing of next adjacent servo sector using an error between an actual detection timing and an expected detection timing of a servo sector which has already been detected. The HDC/MPU controls the clock frequency using the expected timing and writes and reads user data between current servo sector and next adjacent servo sector according to the clock signal.

摘要翻译： 根据本发明的实施例抑制由于其旋转抖动对磁盘的图案的不利影响并且以更准确的定时写入图案。 根据一个实施例，硬盘控制器/微处理单元（HDC / MPU）控制数据时钟产生电路的时钟频率，从而在写入和读取用户数据时补偿磁盘的旋转抖动。 HDC / MPU期望使用已经检测到的伺服扇区的实际检测定时和预期检测定时之间的误差来检测下一相邻伺服扇区的检测定时。 HDC / MPU使用预期定时控制时钟频率，并根据时钟信号在当前伺服扇区和下一个相邻伺服扇区之间写入和读取用户数据。

公开(公告)号：US20060262449A1

公开(公告)日：2006-11-23

申请号：US11437552

申请日：2006-05-19

申请人： Fuminori Sai ,  Yutaka Ozawa ,  Kohji Takasaki ,  Hiroshi Yanagisawa ,  Satoshi Yamamoto

发明人： Fuminori Sai ,  Yutaka Ozawa ,  Kohji Takasaki ,  Hiroshi Yanagisawa ,  Satoshi Yamamoto

IPC分类号： G11B19/02

CPC分类号： G11B5/59633

摘要： Embodiments of the invention efficiently conduct servo corrections for preventing error propagation during SSW. In an example of the present invention, a servo position signal generator generates a servo position signal indicative of the current position of a read element on the basis of a servo signal from a servo channel. A target position generator generates correction data from multiply and add operations between the PES generated when the track that the read element is following is written, and pre-registered correction coefficients. A correction target position is generated from the correction data and a reference target position, and then output to a position error calculator. The position error calculator generates a position error signal (PES) from the servo position signal and the target position signal, and outputs PES to a servo controller. The servo controller generates a control signal (DACOUT) in accordance with PES, and a motor driver unit supplies an electric current of a required value to a VCM in accordance with the control signal.

摘要翻译： 本发明的实施例有效地进行伺服校正，以防止SSW期间的错误传播。 在本发明的一个例子中，伺服位置信号发生器基于来自伺服通道的伺服信号产生指示读取元件的当前位置的伺服位置信号。 目标位置发生器在读取元件所追踪的轨迹被写入时产生的PES和预先登记的校正系数之间乘法生成校正数据并且在其之间添加操作。 从校正数据和参考目标位置产生校正目标位置，然后输出到位置误差计算器。 位置误差计算器从伺服位置信号和目标位置信号产生位置误差信号（PES），并将PES输出到伺服控制器。 伺服控制器根据PES生成控制信号（DACOUT），并且电动机驱动单元根据控制信号向VCM提供所需值的电流。

公开(公告)号：US07023638B2

公开(公告)日：2006-04-04

申请号：US10676639

申请日：2003-09-30

申请人： Nobuya Matsubara ,  Fuminori Sai ,  Kohji Takasaki ,  Noboru Yoshida

发明人： Nobuya Matsubara ,  Fuminori Sai ,  Kohji Takasaki ,  Noboru Yoshida

IPC分类号： G11B5/09

CPC分类号： H03L7/091 ,  G11B5/00 ,  G11B5/012 ,  G11B20/1403 ,  G11B2005/001

摘要： A correction mechanism for use in a data storage system that allows data to be read even if the recorded data has been phase shifted.

摘要翻译： 一种在数据存储系统中使用的校正机制，即使记录的数据已被相移也允许读取数据。

公开(公告)号：US07532424B2

公开(公告)日：2009-05-12

申请号：US11494684

申请日：2006-07-26

申请人： Fuminori Sai ,  Kohji Takasaki ,  Masahiro Shohda ,  Hiroshi Yanagisawa

发明人： Fuminori Sai ,  Kohji Takasaki ,  Masahiro Shohda ,  Hiroshi Yanagisawa

IPC分类号： G11B20/10 ,  G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59638

摘要： Embodiments of the invention reduce the effect of the rotational jitters to write a pattern in more accurate timing in self-writing a pattern on a magnetic disk. In an embodiment of the invention, respective patterns in N sectors are first written on an inner circumferential side track as reference patterns with a default clock frequency and a default clock number (a writing interval clock number between respective patterns). The respective reference patterns are then read out plural times for measuring intervals thereof to determine an average value of intervals between the respective sectors. Using the value, a target value is calculated in each sector, which is used in wiring new patterns on the outer circumferential side at even intervals. Then, the respective reference patterns on the inner circumferential side track are read out while the new patterns are written on the outer circumferential side. The respective outer circumferential side patterns are written with the modulated clock frequency after a delay time calculated for every sector has passed from the time when the reference patterns on the inner circumferential side track are detected.

摘要翻译： 本发明的实施例减少了旋转抖动在更精确的定时中写入图案以在自动写入磁盘上的图案的效果。 在本发明的一个实施例中，首先将N个扇区中的各个图案作为具有默认时钟频率和默认时钟数（各个图案之间的写入间隔时钟数）的参考图案写入内周侧磁道。 然后，多个参考图形被读出多次以测量其间隔，以确定各个扇区之间的间隔的平均值。 使用该值，在每个扇区中计算目标值，其用于以均匀间隔在外周侧布线新图案。 然后，在新的图案被写入外周侧时，读出内周侧轨道上的各个参考图案。 在从检测到内周侧轨迹上的基准图案的时刻开始经过每个扇区的延迟时间之后，各调制时钟频率被写入。