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1. 发明授权

US06476997B2 Disk device, track positioning method and method for generating a position error signal 失效
标题翻译：磁盘设备，轨道定位方法和产生位置误差信号的方法
公开(公告)号：US06476997B2
公开(公告)日：2002-11-05
申请号：US09120906
申请日：1998-07-22
申请人： Yukio Fukushima , Tetsuo Ueda , Toshio Kakihara , Hideo Asano
发明人： Yukio Fukushima , Tetsuo Ueda , Toshio Kakihara , Hideo Asano
IPC分类号： G11B5596
CPC分类号： G11B5/59627
摘要： A disk device, track positioning method, and method for generating a position error signal in which the occurrence of a wrong correction operation can be prevented by creating an appropriate PES without using a burst pattern having a defect, and reassign sectors can be decreased by decreasing defective sectors thereby to reduce the performance degradation is disclosed. In the disk device and track positioning method, the defect of a burst pattern read out from a disk is detected, and if a defect is detected in the burst pattern, a data value corresponding to the sum data of the burst pattern pair having the defect detected is obtained by measuring the maximum amplitude value of the burst pattern pairing with the burst pattern having the defect detected, and a PES is created according to the amplitude of the burst pattern having the defect detected and the maximum amplitude value.
摘要翻译：一种磁盘装置，轨道定位方法以及用于产生位置误差信号的方法，其中可以通过在不使用具有缺陷的脉冲串模式的情况下创建适当的PES来防止出现错误的校正操作，并且可以通过减少重新分配扇区来减少重新分配扇区缺陷扇区，从而降低性能下降。在盘装置和轨迹定位方法中，检测从盘读出的脉冲串模式的缺陷，并且如果在脉冲串模式中检测到缺陷，则与具有缺陷的脉冲串模式对的和数据相对应的数据值通过测量与检测到缺陷的脉冲串模式匹配的脉冲串模式的最大幅度值，并且根据具有检测到的缺陷的脉冲串模式的幅度和最大振幅值来创建PES来获得检测到的。

2. 发明授权

US06289416B1 Disk drive device and a method for controlling the same 失效
标题翻译：磁盘驱动装置及其控制方法
公开(公告)号：US06289416B1
公开(公告)日：2001-09-11
申请号：US09139933
申请日：1998-08-26
申请人： Yukio Fukushima , Toshio Kakihara , Kazushige Okutsu , Tetsuo Ueda
发明人： Yukio Fukushima , Toshio Kakihara , Kazushige Okutsu , Tetsuo Ueda
IPC分类号： G06F1208
CPC分类号： G06F3/0607 , G06F3/0659 , G06F3/0676 , G06F12/0866
摘要： The present invention provides a disk drive device containing a cache memory having K queue entries (K is an integer) to operate in a write cache mode and a method for controlling the disk drive device. The number of the queue entries to be used in the write cache mode can be gradually decreased from the number K to a decreased number by a predetermined number, and the number of the queue entries to be used in the write cache mode can be gradually increased from the decreased number towards the number K by a predetermined number, in response to values of parameters, such as an error rate and Non Repeatable Run Out or Repeatable Run Out of the rotating data recording disk at writing of data from the cache memory to a rotating data recording disk.
摘要翻译：本发明提供了一种包含具有以写入高速缓存模式操作的K个队列条目（K为整数）的高速缓冲存储器的磁盘驱动器装置以及用于控制磁盘驱动器件的方法。在写入高速缓存模式中要使用的队列条目的数量可以从数量K逐渐减少到减少的数量预定的数量，并且可以逐渐增加在写入高速缓存模式中使用的队列条目的数量响应于数据从高速缓冲存储器写入到旋转数据记录盘的参数值，例如错误率和不可重复运行或可重复运行的数据从数量减少预定数量旋转数据记录盘。

3. 发明授权

US06721844B1 Data storage unit and method for starting data storage unit 失效
标题翻译：用于启动数据存储单元的数据存储单元和方法
公开(公告)号：US06721844B1
公开(公告)日：2004-04-13
申请号：US09114584
申请日：1998-07-13
申请人： Kazushige Okutsu , Tetsuo Ueda , Yukio Fukushima , Toshio Kakihara
发明人： Kazushige Okutsu , Tetsuo Ueda , Yukio Fukushima , Toshio Kakihara
IPC分类号： G06F1200
CPC分类号： G11B19/20 , G11B19/2054
摘要： To provide a method of starting a data storage unit which allows a computer system to be used as early as possible. The present invention relates to a method for starting up a computer system having a data storage unit equipped with an actuator arm which supports a flexible cable. The method allows a command from the host computer to be processed before generation of corrected tension data for the flexible cable. The method includes the steps of turning on power; executing a start operation, excluding generation of corrected tension data of the flexible cable; causing an access command from a host computer to be in an executable state, following the step of executing a start operation; and executing generation of corrected tension data of the flexible cable, following the step of causing an access command from a host computer to be in an executable state.
摘要翻译：提供启动能够尽可能早地使用计算机系统的数据存储单元的方法。本发明涉及一种用于启动具有数据存储单元的计算机系统的方法，所述数据存储单元配备有支撑柔性电缆的致动器臂。该方法允许在生成用于柔性电缆的校正张力数据之前处理来自主计算机的命令。该方法包括打开电源的步骤; 执行开始操作，不包括产生柔性电缆的校正张力数据; 在执行开始操作的步骤之后，使来自主计算机的访问命令处于可执行状态; 以及执行所述柔性电缆的校正张力数据的产生，其中所述步骤是使来自主计算机的访问命令处于可执行状态。

4. 发明授权

US06441982B1 Dummy write method for a magnetic head and drive unit for carrying out the method 失效
标题翻译：用于执行该方法的磁头和驱动单元的虚拟写入方法
公开(公告)号：US06441982B1
公开(公告)日：2002-08-27
申请号：US09448234
申请日：1999-11-24
申请人： Yukio Fukushima , Tetsuo Ueda , Hideo Asano
发明人： Yukio Fukushima , Tetsuo Ueda , Hideo Asano
IPC分类号： G11B509
CPC分类号： G11B5/00 , G11B5/012 , G11B2005/0008 , G11B2005/0013 , G11B2005/0021
摘要： A drive unit which recovers from write instability by heating the magnetic head prior to performing a dummy write operation is described. In the preferred embodiments, once write instability has been detected the head may be heated by friction with the rotating disk or by an external heater. In the friction method the head is moved to a safe area of the disk such as a textured landing zone while the disk rotation is continued. In drives using unload ramps, a heater is preferably placed at the the ramp so that the head can be heated while parked on the ramp. In each of these embodiments dummy write operations are performed while the head is in a thermally excited state due to the heating. The combination of heating and the dummy write operation aids in restoring write stability.
摘要翻译：描述通过在执行虚拟写入操作之前加热磁头而从写入不稳定性恢复的驱动单元。在优选实施例中，一旦检测到写入不稳定性，头部可以通过与旋转盘的摩擦或外部加热器的摩擦来加热。在摩擦方法中，当盘旋转持续时，头移动到盘的安全区域，例如纹理着陆区。在使用卸载斜坡的驱动器中，优选地将加热器放置在斜坡处，使得头部可以在停放在斜坡上时被加热。在这些实施例的每一个中，由于加热，头部处于热激发状态时执行伪写入操作。加热和虚拟写入操作的组合有助于恢复写入稳定性。

5. 发明授权

US06496315B1 Disk drive with off-track write prevention 失效
标题翻译：磁盘驱动器，具有非磁道写入防止功能
公开(公告)号：US06496315B1
公开(公告)日：2002-12-17
申请号：US09448233
申请日：1999-11-24
申请人： Tetsuo Ueda , Yukio Fukushima , Tatsuya Sakai
发明人： Tetsuo Ueda , Yukio Fukushima , Tatsuya Sakai
IPC分类号： G11B1504
CPC分类号： G11B5/59627 , G11B5/59688
摘要： A disk drive with the capability to prevent off-track writing with reduced false triggering is described. An improved method of predicting the position of a head is used to determine whether the head is on or off-track. A position error signal at an nth servo position Pn and a velocity Vn at the nth servo position (Vn=Pn−Pn−1) are calculated using values read at the nth and n−1 head positions. Based on these Pn and Vn and on the output of the servo controller at the nth servo position Un, the predicted PESn+1 is calculated as: Predicted PESn+1=Pn+Vn+kUn where k is a constant. Data is inhibited from being written between the nth servo position and the (n+1) servo position, when absolute values of the calculated Pn, Vn, and predicted PESn+1 meet any condition of the following conditions (1) through (3): (1) |Pn|>C1, (2) |Vn|>C2, and (3) |Predicted PESn+1>C3 where C1, C2, and C3 are constants determined for the embodiment.
摘要翻译：描述了一种能够以减少错误触发来防止偏离写入的能力的磁盘驱动器。使用预测头部位置的改进方法来确定头部是开启还是离开轨迹。使用在第n和第n-1个头部位置读取的值来计算第n个伺服位置Pn处的位置误差信号和第n个伺服位置处的速度Vn（Vn = Pn-Pn-1）。基于这些Pn和Vn以及在第n个伺服位置Un处的伺服控制器的输出，预测的PESn + 1被计算为：其中k是常数。禁止数据写入第n个伺服位置和（ n + 1）伺服位置，当计算的Pn，Vn和预测的PESn + 1的绝对值满足以下条件（1）至（3）的任何条件时：（1）| Pn |> C1，（2）| Vn |> C2和（3）|预测的PESn + 1> C3，其中C1，C2和C3是为实施例确定的常数。

6. 发明授权

US06671110B2 Method and apparatus for detecting abnormal magnetic head fly height 失效
标题翻译：用于检测异常磁头飞高的方法和装置
公开(公告)号：US06671110B2
公开(公告)日：2003-12-30
申请号：US09776360
申请日：2001-02-02
申请人： Sachiyo Baba , Yukio Fukushima , Hidetsugu Tanka , Tetsuo Ueda
发明人： Sachiyo Baba , Yukio Fukushima , Hidetsugu Tanka , Tetsuo Ueda
IPC分类号： G11B2736
CPC分类号： G11B21/21 , G11B5/012 , G11B5/6029
摘要： A method and apparatus for detecting an abnormal fly height of a magnetic head. The method includes reproducing a servo signal recorded on a magnetic disk in advance by the magnetic head when a write operation for writing data on the magnetic disk by the magnetic head is initiated. Next, the gain of the servo signal based on the head part of the servo signal reproduced by the magnetic head is determined. The gain of the servo signal is then compared with a reference value to detect an abnormal fly height of the magnetic head. In an advantageous embodiment, the reference value is the gain of a servo signal determined when the fly height of the magnetic head is normal. Alternatively, in other advantageous embodiments, the reference value is based on the gain of a previous servo signal.
摘要翻译：一种用于检测磁头的异常飞行高度的方法和装置。该方法包括当通过磁头写入磁盘上的数据的写入操作时，由磁头预先再现记录在磁盘上的伺服信号。接下来，确定基于由磁头再现的伺服信号的头部的伺服信号的增益。然后将伺服信号的增益与参考值进行比较，以检测磁头的异常飞行高度。在有利的实施例中，参考值是当磁头的飞行高度正常时确定的伺服信号的增益。或者，在其他有利的实施例中，参考值基于先前伺服信号的增益。

7. 发明授权

US06574065B1 Method and apparatus for adaptive resonance mode cancellation servo in a rotating storage system 失效
标题翻译：旋转存储系统中自适应共振模式消除伺服的方法和装置
公开(公告)号：US06574065B1
公开(公告)日：2003-06-03
申请号：US09311307
申请日：1999-05-14
申请人： Sri M. Sri-Jayantha , Arun Sharma , Hien Dang , Tetsuo Ueda , Kenji Okada , Hideo Asano , Tatsuya Endoh , Masayuki Takeuchi
发明人： Sri M. Sri-Jayantha , Arun Sharma , Hien Dang , Tetsuo Ueda , Kenji Okada , Hideo Asano , Tatsuya Endoh , Masayuki Takeuchi
IPC分类号： G11B2102
CPC分类号： G11B21/083 , G11B5/59605
摘要： A method and apparatus for adaptive resonance cancellation in a rotating storage system, includes designing a set of digitally selectable optimum resonance cancellation filters, generating a series of excitation signals for injection into the filters, generating a characteristic resonance frequency based on the excitation signals, and computing an address pointer corresponding to the resonance frequency, to select an optimum resonance cancellation filter.
摘要翻译：一种用于旋转存储系统中自适应共振消除的方法和装置，包括设计一组数字可选择的最佳共振消除滤波器，产生一系列用于注入滤波器的激励信号，基于激励信号产生特征谐振频率，以及计算对应于谐振频率的地址指针，以选择最佳谐振消除滤波器。

8. 发明授权

US06914745B2 Head movement controlling based on servo generated speed control values 失效
标题翻译：基于伺服发生速度控制值的头部运动控制
公开(公告)号：US06914745B2
公开(公告)日：2005-07-05
申请号：US10222049
申请日：2002-08-16
申请人： Masayuki Takeuchi , Yuzo Nakagawa , Yukio Fukushima , Tetsuo Ueda
发明人： Masayuki Takeuchi , Yuzo Nakagawa , Yukio Fukushima , Tetsuo Ueda
IPC分类号： G11B21/12 , G11B5/55 , G11B21/08 , G11B5/596
CPC分类号： G11B5/5526
摘要： The hard disk drive comprises: a magnetic disk 2 having servo information stored; magnetic heads 4 seeking on the magnetic disk 2 and staying at a predetermined position to read or write data; a voice coil motor 6 moving the magnetic heads 4 to the predetermined position of the magnetic disk 2; a position controller supplying a driving current to the voice coil motor 6 based on the servo information read by the magnetic heads 4. The position controller includes: a CPU 12 outputting a speed control value based on the servo information; a DAC 7 and a VCM driver 8 converting the speed control value into the driving current; and a controller 10 limiting a driving speed of the voice coil motor 6 in a case that an output timing of the speed control value is shifted.
摘要翻译：硬盘驱动器包括：具有存储伺服信息的磁盘2; 在磁盘2上寻求并停留在预定位置以读取或写入数据的磁头4; 将磁头4移动到磁盘2的预定位置的音圈电动机6; 基于由磁头4读取的伺服信息，向音圈马达6提供驱动电流的位置控制器。位置控制器包括：CPU 12，根据伺服信息输出速度控制值; 将速度控制值转换为驱动电流的DAC7和VCM驱动器8; 以及在速度控制值的输出定时偏移的情况下限制音圈电动机6的驱动速度的控制器10。

9. 发明授权

US06981205B2 Data storage apparatus, read data processor, and read data processing method 有权
标题翻译：数据存储装置，读数据处理器和读数据处理方法
公开(公告)号：US06981205B2
公开(公告)日：2005-12-27
申请号：US10279305
申请日：2002-10-23
申请人： Yukio Fukushima , Katsuhiko Katoh , Shunsuke Kobayashi , Takashi Kuroda , Yuzo Nakagawa , Fuminori Sai , Emi Shimono , Tetsuya Tamura , Tetsuo Ueda
发明人： Yukio Fukushima , Katsuhiko Katoh , Shunsuke Kobayashi , Takashi Kuroda , Yuzo Nakagawa , Fuminori Sai , Emi Shimono , Tetsuya Tamura , Tetsuo Ueda
IPC分类号： G06F11/08 , G06F3/06 , G11B20/10 , G11B20/18 , H03M13/43
CPC分类号： G11B20/1809
摘要： To improve the probability of error correction, thereby generating correct read data. Data is read from the same sector by a number of times and a majority decision is done in the same address, thereby the most frequently read value is regarded as the true data value in the address. For example, for an address 00, “00” is handled as a true data value.
摘要翻译：为了提高纠错的概率，从而产生正确的读取数据。数据从同一扇区读取多次，多数决定在相同的地址中完成，从而将最常读取的值视为地址中的真实数据值。例如，对于地址00，将“00”作为真实数据值处理。

10. 发明授权

US06597530B2 Method and apparatus for disk drive seek control 失效
公开(公告)号：US06597530B2
公开(公告)日：2003-07-22
申请号：US09935272
申请日：2001-08-22
申请人： Hideo Asano , Kenji Okada , Tetsuo Ueda , Koichi Arai , Hideki Ohzeki
发明人： Hideo Asano , Kenji Okada , Tetsuo Ueda , Koichi Arai , Hideki Ohzeki
IPC分类号： G11B5596
CPC分类号： G11B5/5547
摘要： A disk drive seek control system device to reduce track pitch. When data is recorded, an offset value is added to the position of a read head element along the width of a track corresponding to an offset &Dgr;w between the read head element and a write head element. The value of the offset depends on the yaw angle &thgr; of the head. When data is read, the position of the read head element is chosen to be either the position of the write head element during write operations, or the midpoint between the position of the write head element and the read head element during write operations, or the center of a track.

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