公开(公告)号：US08300351B2

公开(公告)日：2012-10-30

申请号：US13167671

申请日：2011-06-23

申请人： Hiroyuki Suzuki ,  Hiroshi Kubota ,  Masahide Yatsu

发明人： Hiroyuki Suzuki ,  Hiroshi Kubota ,  Masahide Yatsu

IPC分类号： G11B5/596 ,  G11B21/02 ,  G11B5/09

CPC分类号： G11B5/59672 ,  G11B5/59627

摘要： According to one embodiment, a magnetic recording apparatus includes a magnetic recording medium for perpendicular magnetic recording system, a magnetic head including a read head to read data from the magnetic recording medium, and an actuator to actuate the magnetic head on the magnetic recording medium. The magnetic recording medium includes a first magnetic pattern recorded in a servo area by applying a magnetic field horizontally to a disk surface, and the first magnetic pattern corresponding to positioning data used for positioning the magnetic head. The magnetic recording medium further includes a second magnetic pattern recorded in the servo area by applying a magnetic field perpendicularly to the disk surface, and the second magnetic pattern corresponding to position correction data used for correcting the positioning data. The position correction data is derived from modulated original position correction data. The original position correction data is created for correcting the positioning data.

摘要翻译： 根据一个实施例，磁记录装置包括用于垂直磁记录系统的磁记录介质，包括用于从磁记录介质读取数据的读头的磁头和用于致动磁记录介质上的磁头的致动器。 磁记录介质包括通过向盘表面水平施加磁场而记录在伺服区域中的第一磁图案，以及对应于用于定位磁头的定位数据的第一磁图案。 磁记录介质还包括通过垂直于盘表面施加磁场而记录在伺服区中的第二磁图，和与用于校正定位数据的位置校正数据相对应的第二磁图。 位置校正数据从调制的原始位置校正数据导出。 创建用于校正定位数据的原始位置校正数据。

公开(公告)号：US20110310506A1

公开(公告)日：2011-12-22

申请号：US13028775

申请日：2011-02-16

申请人： Atsushi SUZUKI ,  Masafumi Iwashiro ,  Masahide Yatsu

发明人： Atsushi SUZUKI ,  Masafumi Iwashiro ,  Masahide Yatsu

IPC分类号： G11B5/596

CPC分类号： G11B5/5582

摘要： According to one embodiment, a magnetic disk device includes a magnetic disk, a magnetic head, a position error signal output module, a vibration pattern detector, an adder, and a head positioning controller. The magnetic head moves over the magnetic disk. The position error signal output module outputs a position error signal based on a difference between a head position of the magnetic head over the magnetic disk and a target position on the magnetic disk. The vibration pattern detector detects a vibration pattern of the magnetic head caused by vibration. The adder adds the position error signal to an offset signal indicating amplitude of the vibration pattern. The head positioning controller moves the head position to the target position based on a result of addition by the adder.

摘要翻译： 根据一个实施例，磁盘装置包括磁盘，磁头，位置误差信号输出模块，振动模式检测器，加法器和磁头定位控制器。 磁头在磁盘上移动。 位置误差信号输出模块基于磁头的头部位置与磁盘上的目标位置之间的差异输出位置误差信号。 振动模式检测器检测由振动引起的磁头的振动模式。 加法器将位置误差信号加到表示振动模式振幅的偏移信号上。 头部定位控制器基于加法器的相加结果将头部位置移动到目标位置。

公开(公告)号：US07855850B2

公开(公告)日：2010-12-21

申请号：US12146622

申请日：2008-06-26

申请人： Toshitaka Matsunaga ,  Masahide Yatsu ,  Hideo Sado ,  Katsuki Ueda ,  Shouji Nakajima ,  Seiji Mizukoshi ,  Shinichirou Kouhara

发明人： Toshitaka Matsunaga ,  Masahide Yatsu ,  Hideo Sado ,  Katsuki Ueda ,  Shouji Nakajima ,  Seiji Mizukoshi ,  Shinichirou Kouhara

IPC分类号： G11B21/12

CPC分类号： G11B5/59627 ,  G11B5/59661 ,  G11B5/59688

摘要： According to one embodiment, a disk drive having a disk, a read head, a servo controller, and a CPU. In the disk, a multi-spiral servo pattern is recorded. The read head reproduces a hexagon-shaped detection signal from the multi-spiral servo pattern. The servo controller generates amplitudes values for respective frames, from the multi-spiral servo pattern. The CPU performs positional-error calculation by using the amplitude values for the frames. Upon detecting a positional change of the head is detected, the CPU performs the positional-error calculation by using the amplitude values generated at the time of replacing the frames with other frames, and corrects the positional error by adding an offset determined from the positional change of the head, to the result of the positional-error calculation.

摘要翻译： 根据一个实施例，具有盘，读头，伺服控制器和CPU的盘驱动器。 在盘中记录多螺旋伺服模式。 读取头再现来自多螺旋伺服模式的六边形检测信号。 伺服控制器从多螺旋伺服模式产生各个帧的振幅值。 CPU通过使用帧的振幅值来执行位置误差计算。 在检测到检测到头部的位置变化时，CPU通过使用在用其他帧替换帧时产生的振幅值来执行位置误差计算，并且通过将从位置变化确定的偏移相加来校正位置误差 的位置误差计算结果。

公开(公告)号：US07804659B2

公开(公告)日：2010-09-28

申请号：US11942486

申请日：2007-11-19

申请人： Toshitaka Matsunaga ,  Masahide Yatsu ,  Hideo Sado ,  Katsuki Ueda ,  Shouji Nakajima ,  Seiji Mizukoshi ,  Shinichirou Kouhara

发明人： Toshitaka Matsunaga ,  Masahide Yatsu ,  Hideo Sado ,  Katsuki Ueda ,  Shouji Nakajima ,  Seiji Mizukoshi ,  Shinichirou Kouhara

IPC分类号： G11B21/02

CPC分类号： G11B5/596 ,  G11B5/59638 ,  G11B5/59661

摘要： According to one embodiment, there is to provide a disk drive which calculates an error in the position of a head on the basis of concentric servo patterns. The disk drive has a disk medium on which spiral servo patterns are recorded and a read head which reads the spiral servo patterns from the disk medium. A servo controller reproduces a hexagonal burst signal from the spiral servo patterns read by the read head to generate position data associated with servo burst signals. The CPU uses the position data to perform a position error calculation.

摘要翻译： 根据一个实施例，提供一种盘驱动器，其基于同心伺服模式来计算头部位置的误差。 磁盘驱动器具有在其上记录有螺旋式伺服图案的磁盘介质和从盘介质读取螺旋式伺服图案的读取头。 伺服控制器再现来自读头读取的螺旋伺服模式的六角脉冲信号，以产生与伺服脉冲串信号相关联的位置数据。 CPU使用位置数据执行位置误差计算。

公开(公告)号：US07477472B2

公开(公告)日：2009-01-13

申请号：US11976822

申请日：2007-10-29

申请人： Hideo Sado ,  Masahide Yatsu ,  Katsuki Ueda ,  Toshitaka Matsunaga ,  Seiji Mizukoshi ,  Shouji Nakajima ,  Shinichirou Kouhara

发明人： Hideo Sado ,  Masahide Yatsu ,  Katsuki Ueda ,  Toshitaka Matsunaga ,  Seiji Mizukoshi ,  Shouji Nakajima ,  Shinichirou Kouhara

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59638 ,  G11B5/59661

摘要： According to one embodiment, a method of writing a target servo pattern constituting concentric servo tracks on a disk medium provided in a disk drive. In the method, a cumulative amplitude value of the waveform of each spiral servo pattern reproduced by the head of the disk drive is calculated, a slope of each spiral servo pattern is calculated from the cumulative amplitude value, and a pitch at which the head should be moved to write the target servo pattern is determined on the basis of the slopes of the spiral servo patterns.

摘要翻译： 根据一个实施例，一种将构成同心伺服磁道的目标伺服模式写入设置在磁盘驱动器中的磁盘介质上的方法。 在该方法中，计算由磁盘驱动器的磁头重放的每个螺旋伺服模式的波形的累积振幅值，根据累积振幅值计算每个螺旋伺服模式的斜率， 移动到写入，基于螺旋伺服模式的斜率来确定目标伺服模式。

公开(公告)号：US07221533B2

公开(公告)日：2007-05-22

申请号：US11262716

申请日：2005-11-01

申请人： Masafumi Iwashiro ,  Masahide Yatsu ,  Hideo Sado

发明人： Masafumi Iwashiro ,  Masahide Yatsu ,  Hideo Sado

IPC分类号： G11B21/02 ,  G11B5/596

CPC分类号： G11B5/59627 ,  G11B5/59633

摘要： A method of writing servo information for use in head positioning control on a disk medium incorporated in a disk drive, including executing the head positioning control based on original servo information recorded on the disk medium, producing positioning correction information to correct a positioning error, and recording the positioning correction information in a correction information recording buffer.

摘要翻译： 一种写入用于磁盘定位控制的伺服信息的方法，包括：根据记录在磁盘介质上的原始伺服信息执行磁头定位控制，产生定位校正信息以校正定位误差;以及 在校正信息记录缓冲器中记录定位校正信息。

公开(公告)号：US07106545B2

公开(公告)日：2006-09-12

申请号：US11017236

申请日：2004-12-21

申请人： Masahide Yatsu

发明人： Masahide Yatsu

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B27/36 ,  G11B2220/20

摘要： An additive self-servowriting method that records a servo pattern on a disk surface in a disk drive is disclosed. A servowriting method according to the present invention writes an initial servo pattern with a head moved to the inner circumference of the disk at the initial time. Then, additive servowriting operation is performed to write an additive servo pattern with the head positioned in the outer circumferential direction of the disk. When it is impossible to continue the additive servowriting operation in the middle of the operation, the head is set back to the previous additive servo pattern to resume the additive servowriting operation.

摘要翻译： 公开了一种在盘驱动器中的盘表面上记录伺服图案的附加自伺服驱动方法。 根据本发明的伺服驱动方法在初始时刻写入具有移动到盘的内圆周的头的初始伺服模式。 然后，进行附加伺服驱动操作，以将头部位于盘的外周方向上写入添加剂伺服图案。 当在操作中途不可能继续添加伺服驱动操作时，将磁头设置回到前一个添加剂伺服模式，以恢复附加伺服驱动操作。

公开(公告)号：US06738215B2

公开(公告)日：2004-05-18

申请号：US10102817

申请日：2002-03-22

申请人： Masahide Yatsu

发明人： Masahide Yatsu

IPC分类号： G11B2102

CPC分类号： G11B5/59655

摘要： The magnetic disk apparatus and methods for writing servo data in the magnetic disk drive apparatus detects a relative position between a magnetic head and a writing surface and performs a feedback on the detected relative position for determining the servo data writing position. Based on reference servo patterns that are preliminarily recorded on a portion of at least one surface of the disk, two pairs of head elements, arranged facing respective surfaces of the disk, alternately perform postscript operations of servo patterns while reducing a relative position error between the head and the disk in order to increase writing accuracy of the servo patterns writing operation.

摘要翻译： 磁盘装置和用于在磁盘驱动装置中写入伺服数据的方法检测磁头和写入面之间的相对位置，并且对检测到的相对位置执行反馈以确定伺服数据写入位置。 基于预先记录在盘的至少一个表面的一部分上的参考伺服图案，面对盘的各个表面布置的两对头部元件交替地执行伺服图案的后记操作，同时减小了相对位置误差 头和磁盘，以提高伺服模式写入操作的写入精度。

公开(公告)号：US06175465B1

公开(公告)日：2001-01-16

申请号：US09086529

申请日：1998-05-29

申请人： Hidetoshi Kawachi ,  Masahide Yatsu ,  Tatsuharu Kusumoto

发明人： Hidetoshi Kawachi ,  Masahide Yatsu ,  Tatsuharu Kusumoto

IPC分类号： G11B5596

CPC分类号： G11B5/59611 ,  G11B5/59655

摘要： A servo system uses a disk on which two pairs of burst data items A and B and burst data items C and D are prerecorded, and the servo system performs positioning control for positioning a head within a range of a track on a disk. The servo system sets a range of a track to be divided into a first area regarding the track center as a reference position, a second area regarding a boundary position between tracks as a reference position, and a third area regarding a middle position between the reference positions, as a reference position. In the first area, the servo system calculates position information of the head by a first calculation formula using the burst data items A and B. In the second area, the servo system calculates position information of the head by a second calculation formula using the burst data items C and D. Further, in the third area, the servo system calculates an average value of calculation results from the first and second calculation formulas, as position information.

摘要翻译： 伺服系统使用其上预先记录了两对突发数据项A和B以及突发数据项C和D的盘，并且伺服系统执行定位控制以将磁头定位在磁盘上的轨道的范围内。 伺服系统将要被分割成关于轨道中心的第一区域作为参考位置的轨道的范围，关于作为参考位置的轨道之间的边界位置的第二区域以及关于参考点之间的中间位置的第三区域 职位，作为参考。 在第一区域中，伺服系统使用突发数据项A和B以第一计算公式计算头部的位置信息。在第二区域中，伺服系统使用第二计算公式使用脉冲​​串来计算头部的位置信息 数据项C和D.此外，在第三区域中，伺服系统将来自第一和第二计算公式的计算结果的平均值计算为位置信息。

公开(公告)号：US07489468B2

公开(公告)日：2009-02-10

申请号：US11634960

申请日：2006-12-07

申请人： Yusuke Ohinata ,  Koji Osafune ,  Yuji Sakai ,  Masahide Yatsu

发明人： Yusuke Ohinata ,  Koji Osafune ,  Yuji Sakai ,  Masahide Yatsu

IPC分类号： G11B5/596

CPC分类号： G11B5/59627 ,  G11B5/5582 ,  G11B19/042

摘要： According to one embodiment, a disk drive is provided which corrects already existing offset information according to a variation of a disk runout amount caused by an occurrence of a disk shift. The disk drive effects a head position adjustment at a head positioning control time with the use of offset information stored in a memory. A CPU measures a variation in the disk runout amount and phase caused by an occurrence of a disk shift resulting from an external shock involved and updates the existing offset information with a correction offset information based on a result of measurement.

摘要翻译： 根据一个实施例，提供了一种磁盘驱动器，其根据由磁盘移位的发生引起的磁盘跳动量的变化来校正已经存在的偏移信息。 磁盘驱动器通过使用存储在存储器中的偏移信息来实现磁头定位控制时间的磁头位置调节。 CPU测量由于涉及的外部冲击导致的磁盘偏移的发生引起的磁盘跳动量和相位的变化，并且基于测量结果用修正偏移信息更新现有的偏移信息。