公开(公告)号：US5903411A

公开(公告)日：1999-05-11

申请号：US599808

申请日：1996-02-12

申请人： Isamu Tomita ,  Tatsuro Sasamoto ,  Yoshihiro Nakao

发明人： Isamu Tomita ,  Tatsuro Sasamoto ,  Yoshihiro Nakao

IPC分类号： G11B21/10 ,  G11B5/596

CPC分类号： G11B21/106

摘要： A storage device includes a predetermined number of disks on which servo information is recorded, and a predetermined number of heads. The heads are positioned on target cylinders on the basis of the servo information read from the disks through the heads, so that information recording/reproducing can be performed. The disks include outer guard band areas located further out than data areas and inner guard band areas located further in than the data area. Analysis information concerning disk surfaces are recorded on the outer guard band areas. Each of the outer guard band areas is segmented into first and second outer guard band areas in a radial direction. The analysis information is recorded on the first outer guard band area. The servo information for an off-track correction is recorded on the second outer guard band area.

摘要翻译： 存储装置包括其上记录有伺服信息的预定数量的盘和预定数量的头。 基于通过磁头从磁盘读取的伺服信息，磁头位于目标气缸上，从而可以执行信息记录/再生。 这些磁盘包括比数据区域更远的外部保护带区域和位于数据区域之外的内部保护带区域。 有关磁盘表面的分析信息被记录在外保护带区域上。 每个外部保护带区域沿径向分割成第一和第二外部保护带区域。 分析信息被记录在第一外保护带区域上。 用于偏离磁道校正的伺服信息被记录在第二外保护带区域上。

公开(公告)号：US6064541A

公开(公告)日：2000-05-16

申请号：US848138

申请日：1997-04-28

申请人： Tatsuro Sasamoto ,  Isamu Tomita ,  Keiji Aruga

发明人： Tatsuro Sasamoto ,  Isamu Tomita ,  Keiji Aruga

IPC分类号： G11B5/596 ,  G11B21/10

CPC分类号： G11B5/59688

摘要： Disclosed are a servo pattern writing method for magnetic disk drives making it possible to write a high-density and easily controllable servo pattern with high producibility, and a magnetic disk drive in which a servo pattern is written according to the method. The servo pattern writing method for magnetic disk drives in which a servo pattern is written on a plurality of surfaces in a magnetic disk drive having the plurality of surfaces comprises a step of writing a master servo pattern on a master surface that is one of the plurality of surfaces, and a step of writing a servo pattern on the surfaces other than the master surface while performing positioning on the basis of the master servo pattern. The master servo pattern contains a pattern identical to the servo pattern to be written on the surfaces other than the master surface. The master servo pattern is written before the master surface is incorporated in a main unit of the magnetic disk drive. Part of the master servo pattern other than the pattern identical to the servo pattern is deleted after the servo pattern is written on the surfaces other than the master surface.

摘要翻译： 公开了一种用于磁盘驱动器的伺服模式写入方法，其可以以高可生产性写入高密度且容易控制的伺服模式，以及根据该方法写入伺服模式的磁盘驱动器。 在具有多个表面的磁盘驱动器的多个表面上写入伺服图形的磁盘驱动器的伺服图案写入方法包括在主表面上写入主伺服图案的步骤，该主表面是多个 并且在基于主伺服模式执行定位的同时，在主表面以外的表面上写入伺服图案的步骤。 主伺服模式包含与要写在主表面以外的表面上的伺服模式相同的模式。 在将主表面并入磁盘驱动器的主单元之前，写入主伺服模式。 伺服模式写在主表面以外的表面上，删除与伺服模式相同的模式以外的主伺服模式的一部分。

公开(公告)号：US5636075A

公开(公告)日：1997-06-03

申请号：US329305

申请日：1994-10-26

申请人： Kazuo Nishimura ,  Tatsuro Sasamoto ,  Hideaki Tanaka ,  Hiroaki Etoh

发明人： Kazuo Nishimura ,  Tatsuro Sasamoto ,  Hideaki Tanaka ,  Hiroaki Etoh

IPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/55 ,  G11B20/12 ,  G11B21/08 ,  G11B27/10 ,  G11B5/09 ,  G11B5/00

CPC分类号： G11B20/1258 ,  G11B20/1252 ,  G11B5/012 ,  G11B5/5547 ,  G11B2020/10916 ,  G11B5/3967

摘要： There is used a disk medium in which tracks are divided into a plurality of zones in the radial direction and information is read and written with a constant linear density by using a clock signal of a different frequency every zone. A drive unit forms a dead space corresponding to at least one track at a zone boundary of the disk medium and reads or writes the information. In the case where it is judged that the head passes through the zone boundary by the seeking operation to the cylinder address position instructed from an upper apparatus, the cylinder address instructed from the upper apparatus is corrected on the basis of the number of boundary passing times and the seeking operation is performed.

摘要翻译： 使用磁盘介质，其中轨道被分成径向方向上的多个区域，并且通过使用每个区域的不同频率的时钟信号以恒定的线密度来读取和写入信息。 驱动单元形成与盘介质的区域边界处的至少一个轨道对应的死区，并读取或写入信息。 在判断头通过搜索操作的区域边界到从上位装置指示的气缸地址位置的情况下，根据边界通过次数来校正从上位装置指示的气缸地址 并执行寻道操作。

公开(公告)号：US5109502A

公开(公告)日：1992-04-28

申请号：US479968

申请日：1990-02-14

申请人： Tatsuro Sasamoto ,  Masamichi Suzuki

发明人： Tatsuro Sasamoto ,  Masamichi Suzuki

IPC分类号： G11B5/55 ,  G11B21/08

CPC分类号： G11B21/083 ,  G11B5/5534

摘要： A head exchange system for a disc drive system for controlling the position of a head so as to cancel, during a head exchange, the previously measured offset value between the head and a track of a recording disc. The head exchange system has a head exchanger for selecting one of a plurality of heads in response to a signal from the host controller for storage of the information to the selected track of the disc. The head exchange system also has a busy signal transmitting unit for transmitting, when changing the selected head, a busy signal to the host controller for a predetermined time when a difference between the offset value for a current selected head and the offset value for a next selected head is bigger than a predetermined value. The busy signal transmitting unit has a busy table for storing a plurality of flag information between each head and the other heads and transmits a busy signal to the host controller when the difference between the offset value for the current selected head and the offset value for the next selected head is bigger than the predetermined value.

公开(公告)号：US06239940B1

公开(公告)日：2001-05-29

申请号：US08982868

申请日：1997-12-02

申请人： Tatsuro Sasamoto ,  Tatsuhiko Kosugi ,  Kazunori Mori ,  Susumu Yoshida

发明人： Tatsuro Sasamoto ,  Tatsuhiko Kosugi ,  Kazunori Mori ,  Susumu Yoshida

IPC分类号： G11B555

CPC分类号： G11B21/083 ,  G11B5/5547 ,  G11B7/08505 ,  G11B11/10563

摘要： A disk device performs feedforward servo control for moving a head to a target track. The disk device includes a calibrating portion for updating feedforward information, for moving the head, into information dedicated to the specific disk device; and a feedforward information storing portion for storing the feedforward information.

摘要翻译： 磁盘装置执行用于将磁头移动到目标磁道的前馈伺服控制。 磁盘装置包括用于将用于移动磁头的前馈信息更新为专用于特定磁盘设备的信息的校准部分; 以及用于存储前馈信息的前馈信息存储部分。

公开(公告)号：US6034830A

公开(公告)日：2000-03-07

申请号：US789122

申请日：1997-01-27

申请人： Tatsuro Sasamoto

发明人： Tatsuro Sasamoto

IPC分类号： G11B20/10 ,  G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B20/12 ,  G11B21/08 ,  G11B21/10 ,  G11B27/30 ,  G11B5/09

CPC分类号： G11B5/012 ,  G11B20/1217 ,  G11B21/083 ,  G11B27/3027 ,  G11B2020/10916 ,  G11B2020/1232 ,  G11B2020/1265 ,  G11B2020/1292 ,  G11B2220/2516 ,  G11B5/5526 ,  G11B5/59655

摘要： The present invention relates to an information recording medium for a disk drive having improved recording efficiency. The information recording medium is provided with discrete servo and data areas, with servo information being recorded in the servo areas. Cylinder information included in one or more servo areas is used to locate particular data areas on a disk. In the present invention at least partial cylinder information in one servo area is used to locate more than one data area by dividing the cylinder information into different servo areas, or using the cylinder information in one servo area to locate a data area associated with another servo area. By recording the divided cylinder information in respective ones of the servo areas provided on a given cylinder on the disk, less disk space is needed for cylinder information, so the size of the data areas can be increased and recording efficiency can be improved.

摘要翻译： 本发明涉及一种具有提高的记录效率的盘驱动器的信息记录介质。 该信息记录介质设有离散的伺服和数据区，伺服信息被记录在伺服区中。 包含在一个或多个伺服区域中的气缸信息用于定位磁盘上的特定数据区域。 在本发明中，通过将一个伺服区域中的气缸信息分割成不同的伺服区域，或者使用一个伺服区域中的气缸信息来定位与另一个伺服区域相关联的数据区域，一个伺服区域中的至少部分气缸信息用于定位多于一个数据区域 区。 通过将设置在盘上的给定圆筒上的各个伺服区域中的分割圆筒信息记录在圆筒信息中，需要较少的盘空间，因此可以提高数据区域的大小并且可以提高记录效率。

公开(公告)号：US5541785A

公开(公告)日：1996-07-30

申请号：US122481

申请日：1993-09-27

申请人： Tatsuro Sasamoto ,  Kazunori Mori

发明人： Tatsuro Sasamoto ,  Kazunori Mori

IPC分类号： G11B21/10 ,  G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59622

摘要： A disk storage device includes at least one disk, a head for scanning a principal surface of the disk in a generally radial direction thereof for reproducing a servo control signal in response to a servo pattern that is recorded on the principal surface, a rotary mechanism for moving the head along the principal surface of the disk generally in the radial direction, an amplifier supplied with the servo signal reproduced at the head for amplifying the same with a predetermined gain, a signal processing circuit for extracting first and second positional control signals each having a phase that is offset with respect to the phase of the other positional control signal by 90 degrees, from the servo control signal, a level detection circuit for detecting a head position at which the first and second positional control signals have simultaneously an identical level and further for detecting the level of the first and second positional control signals at the detected head position, a gain control circuit for controlling the gain of the amplifier such that an absolute value of the foregoing level is set to a predetermined value, and a head position control circuit for controlling a driving circuit in response to a combination of the first and second positional control signals, the head position control circuit locating the head on a predetermined recording track based upon a head position in which the first and second positional control signals have the same level simultaneously.

摘要翻译： 磁盘存储装置包括至少一个磁盘，用于沿其大致径向的方向扫描磁盘的主表面的磁头，用于响应于记录在主表面上的伺服模式再现伺服控制信号;旋转机构， 大致沿径向沿着盘的主表面移动头部，放大器，其提供有在头部再现的伺服信号，用于以预定的增益对其进行放大;信号处理电路，用于提取第一和第二位置控制信号，每个具有 相对于另一位置控制信号的相位相对于伺服控制信号偏移90度的相位，用于检测第一和第二位置控制信号同时具有相同电平的磁头位置的电平检测电路，以及 进一步用于检测在检测到的头位置处的第一和第二位置控制信号的电平，增益con 控制电路，用于控制放大器的增益，使得上述电平的绝对值被设置为预定值;以及磁头位置控制电路，用于响应于第一和第二位置控制信号的组合来控制驱动电路， 头部位置控制电路基于头部位置将头部定位在预定的记录轨道上，其中第一和第二位置控制信号同时具有相同的水平。

公开(公告)号：US20080158717A1

公开(公告)日：2008-07-03

申请号：US11901403

申请日：2007-09-17

申请人： Tatsuro Sasamoto

发明人： Tatsuro Sasamoto

IPC分类号： G11B5/596

CPC分类号： G11B5/59627

摘要： There is provided a technique capable of eliminating the need to create data for compensating the displacement of a servo pattern occurring at the time of writing the servo pattern using an amplitude method and thereby of significantly reducing the production time of a disk medium.A servo pattern writing apparatus that uses a write head to write a servo pattern on a recording medium according to an amplitude method, comprises: a position sensor 8 that detects the displacement amount of the write head with respect to its reference position in the track crossing direction; and a delay amount adjustment circuit 10 that writes a servo pattern in correspondence with a servo pattern write phase amount which is set for compensating the displacement amount detected by the position sensor 8 at the time of demodulation of the servo pattern.

摘要翻译： 提供了一种技术，其能够消除创建用于补偿使用振幅方法写入伺服模式时发生的伺服模式的位移的数据的需要，从而显着减少磁盘介质的生产时间。 一种伺服模式写入装置，其使用写入头根据振幅方法将伺服模式写入记录介质上，包括：位置传感器8，其检测写入头相对于轨道交叉中的其参考位置的位移量 方向; 以及延迟量调整电路10，其对与在解调伺服模式时补偿由位置传感器8检测到的位移量设定的伺服模式写入相位量相对应地写入伺服模式。

公开(公告)号：US06721122B2

公开(公告)日：2004-04-13

申请号：US09735055

申请日：2000-12-11

申请人： Koichi Aikawa ,  Tatsuro Sasamoto ,  Susumu Yoshida ,  Akihide Jinzenji

发明人： Koichi Aikawa ,  Tatsuro Sasamoto ,  Susumu Yoshida ,  Akihide Jinzenji

IPC分类号： G11B5596

CPC分类号： G11B5/59627

摘要： A disk drive unit includes acceleration sensors mounted thereon. A sequence for calculating an amount by which a head actuator is adjusted during recording and readout operations is changed based on an output from the acceleration sensors.

摘要翻译： 磁盘驱动单元包括安装在其上的加速度传感器。 用于计算在记录和读出操作期间调节头致动器的量的顺序根据来自加速度传感器的输出而改变。

公开(公告)号：US5784220A

公开(公告)日：1998-07-21

申请号：US810726

申请日：1997-03-04

申请人： Kazuo Nishimura ,  Tatsuro Sasamoto ,  Hideaki Tanaka ,  Hiroaki Etoh

发明人： Kazuo Nishimura ,  Tatsuro Sasamoto ,  Hideaki Tanaka ,  Hiroaki Etoh

IPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/55 ,  G11B20/12 ,  G11B21/08 ,  G11B27/10 ,  G11B5/596

CPC分类号： G11B20/1258 ,  G11B20/1252 ,  G11B5/012 ,  G11B5/5547 ,  G11B2020/10916 ,  G11B5/3967

摘要： There is used a disk medium in which tracks are divided into a plurality of zones in the radial direction and information is read and written with a constant linear density by using a clock signal of a different frequency every zone. A drive unit forms a dead space corresponding to at least one track at a zone boundary of the disk medium and reads or writes the information. In the case where it is judged that the head passes through the zone boundary by the seeking operation to the cylinder address position instructed from an upper apparatus, the cylinder address instructed from the upper apparatus is corrected on the basis of the number of boundary passing times and the seeking operation is performed.

摘要翻译： 使用磁盘介质，其中轨道被分成径向方向上的多个区域，并且通过使用每个区域的不同频率的时钟信号以恒定的线密度来读取和写入信息。 驱动单元形成与盘介质的区域边界处的至少一个轨道对应的死区，并读取或写入信息。 在判断头通过搜索操作的区域边界到从上位装置指示的气缸地址位置的情况下，根据边界通过次数来校正从上位装置指示的气缸地址 并执行寻道操作。