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。

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：US5796546A

公开(公告)日：1998-08-18

申请号：US661592

申请日：1996-06-11

申请人： Tatsuro Sasamoto ,  Hideyuki Watanabe

发明人： Tatsuro Sasamoto ,  Hideyuki Watanabe

IPC分类号： G11B21/08 ,  G11B5/012 ,  G11B5/48 ,  G11B5/55 ,  G11B19/04 ,  G11B20/18 ,  G11B21/10 ,  G11B27/10 ,  G11B5/516

CPC分类号： G11B5/5547 ,  G11B19/04 ,  G11B20/1816 ,  G11B27/105 ,  G11B5/012 ,  G11B2020/10916 ,  G11B5/4886

摘要： A disk apparatus in which a seek operation of one of a plurality of heads to a target position on one of a plurality of recording disks is performed by using location data on the one of the recording disks, includes a memory unit in which at least defect location data is stored, the defect location data indicating a location of a defect on the recording disks. A defect location determining unit determines a seek path of one of the heads from a present position to the target position prior to performing the seek operation, and detects whether the defect location is included in the seek path. A seek control unit performs the seek operation of the one of the heads by using the location data on the one of the recording disks, and inhibits using the location data at the defect location when the defect location determining unit detects that the defect location is included in the seek path.

摘要翻译： 一种磁盘装置，其中通过使用所述记录盘之一上的位置数据来执行多个磁头之一到目标位置的搜索操作，所述存储单元至少存在缺陷 存储位置数据，缺陷位置数据指示记录盘上缺陷的位置。 缺陷位置确定单元在执行搜索操作之前，从当前位置到目标位置确定其中一个头部的寻道，并检测缺陷位置是否包括在寻道路径中。 搜索控制单元通过使用记录盘上的一个记录盘上的位置数据来执行一个磁头的寻道操作，并且当缺陷位置确定单元检测到缺陷位置被包括时，禁止在缺陷位置使用位置数据 在追求的道路上。

公开(公告)号：US07589929B2

公开(公告)日：2009-09-15

申请号：US11901403

申请日：2007-09-17

申请人： Tatsuro Sasamoto

发明人： Tatsuro Sasamoto

IPC分类号： G11B21/02

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 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 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 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，其检测写入头相对于其在轨道交叉方向上的基准位置的位移量 ; 以及延迟量调整电路，其对与在解调伺服模式时补偿由位置传感器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：US06522488B2

公开(公告)日：2003-02-18

申请号：US09728366

申请日：2000-11-30

申请人： Tatsuro Sasamoto ,  Masakazu Hirano

发明人： Tatsuro Sasamoto ,  Masakazu Hirano

IPC分类号： G11B2736

CPC分类号： G11B5/59605 ,  G11B5/4886 ,  G11B5/596 ,  G11B27/3027 ,  G11B27/36 ,  G11B2220/20

摘要： In a magnetic disk apparatus in which heads integrally having write heads and read heads are arranged correspondingly to data surfaces of plural media, servo information including phase servo patterns is written discretely in a track direction onto the data surfaces of the plural media. For this reason, at first, displacement amounts of the read heads with respect to the write heads are measured in each head and each cylinder position of the media. Next, phases of the phase servo patterns are adjusted so that relative displacement amounts between the reads heads are eliminated in each head and each cylinder position of the media, and the phase servo patterns are written.

摘要翻译： 在其中一体地具有写入头和读取头的磁头相对于多个介质的数据表面布置的磁盘装置中，包括相位伺服模式的伺服信息在磁道方向上离散地写入到多个介质的数据表面上。 为此，首先，读取头相对于写入头的位移量在介质的每个头部和每个气缸位置被测量。 接下来，调整相位伺服图案的相位，使得读取头之间的相对位移量在介质的每个头部和每个气缸位置被消除，并且相位伺服模式被写入。

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：US5623379A

公开(公告)日：1997-04-22

申请号：US384959

申请日：1995-02-07

申请人： Kazuo Nishimura ,  Tatsuro Sasamoto

发明人： Kazuo Nishimura ,  Tatsuro Sasamoto

IPC分类号： G11B19/20 ,  G11B19/22 ,  G11B19/28 ,  H02P6/20 ,  G11B15/48

CPC分类号： H02P6/20 ,  G11B19/20

摘要： A method of controlling start-up of a sensorless spindle motor used in a disk apparatus reduces time spent on start-up of a spindle motor with high reliability. The motor is used for rotating a disk on which information is recorded, and no sensor is provided in the motor for sensing an angular position of a rotor relative to a stator of the motor. The motor is operated at a steady rotational speed and is stopped by supplying a stop command. An aligning operation is performed immediately after the motor is stopped. The aligning operation is performed to rotate the rotor to a predetermined angular position relative to the stator of said motor. The motor is operated at a steady speed by a synchronization control when operation of the motor is started by supplying a start command.

摘要翻译： 在盘装置中使用的无传感器主轴电机的启动控制方法可以节省高可靠性的主轴电动机起动时间。 电动机用于旋转记录有信息的盘，并且在电动机中没有传感器用于感测转子相对于电动机的定子的角位置。 电机以稳定的转速工作，并通过提供停止指令而停止。 在电机停止后立即执行对准操作。 执行对准操作以使转子相对于所述电动机的定子旋转到预定的角位置。 当通过提供启动命令启动电动机的运行时，电动机通过同步控制以稳定的速度运行。

公开(公告)号：US5592347A

公开(公告)日：1997-01-07

申请号：US347516

申请日：1994-11-30

申请人： Kazunori Mori ,  Tatsuro Sasamoto

发明人： Kazunori Mori ,  Tatsuro Sasamoto

IPC分类号： G11B21/10 ,  G11B5/09 ,  G11B5/596 ,  G11B20/10

CPC分类号： G11B5/09 ,  G11B5/59627 ,  G11B20/10009

摘要： In a disk medium, as servo patterns for offset detection, a pattern which is offset to the inner side, a pattern which is offset to the outer side, and a polarity pattern of a size exceeding a width of pattern as necessary are recorded in the track direction at specific cylinder positions of each data surface. In the case where only one of the read signals of the patterns which are offset to the inner side and outer side is obtained, the head is returned in such a direction as to eliminate the offset, and an offset measuring section measures the offset again. In this case, the offset measurement value is set to the total value of the head return amount and the last offset amount obtained from the read signals V1 and V2. When both of the two pattern read signals V1 and V2 are not obtained, the presence or absence of the read signal of the polarity pattern is judged. When the read signal of the polarity pattern exists, the head is offset to the side opposite to the polarity pattern by a predetermined amount and the offset is again measured. When the read signal of the polarity pattern doesn't exist, the head is offset by only the predetermined amount to the side on which the polarity pattern is not recorded and the offset is subsequently measured again.

摘要翻译： 在磁盘介质中，作为用于偏移检测的伺服图案，偏移到内侧的图案，偏移到外侧的图案以及尺寸超过必要的图案宽度的极性图案被记录在 在每个数据表面的特定气缸位置处的轨迹方向。 在仅获得偏移到内侧和外侧的图案的读取信号之一的情况下，头部以消除偏移的方向返回，并且偏移测量部分再次测量偏移。 在这种情况下，将偏移测量值设置为从读取信号V1和V2获得的磁头返回量和最后一个偏移量的总值。 当两个图案读取信号V1和V2均未被获得时，判断极性图案的读出信号的存在与否。 当存在极性图案的读取信号时，头部偏移到与极性图案相反的一侧预定量，并再次测量偏移。 当极性图案的读取信号不存在时，头部仅偏移预定量到没有记录极性图案的一侧，并且随后再次测量偏移量。