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    Recording method, unload method, and magnetic disk
    1.
    发明授权
    Recording method, unload method, and magnetic disk 失效
    记录方法，卸载方法和磁盘

    公开(公告)号：US07636218B2

    公开(公告)日：2009-12-22

    申请号：US11881436

    申请日：2007-07-27

    申请人： Sumie Takeda ,  Katsumoto Onoyama ,  Iwao Oshimi ,  Hiroyuki Oosawa

    发明人： Sumie Takeda ,  Katsumoto Onoyama ,  Iwao Oshimi ,  Hiroyuki Oosawa

    IPC分类号： G11B15/04

    CPC分类号： G11B19/04 ,  G11B21/12

    摘要： Embodiments of the present invention prevent occurrence of a write pole erasure in the event of a power failure within a magnetic disk apparatus of a perpendicular magnetic recording system. According to one embodiment of the present invention, a recording current is flowed through a magnetic head to record data in a magnetic disk. An occurrence of a power failure in the magnetic disk apparatus is detected. When a power failure has occurred, the recording head is demagnetized with power in case of a power failure. The recording head is unloaded after the recording head has been demagnetized. For the power in case of a power failure, back electromotive force of a spindle motor can be utilized. As a result, effects exerted on data recorded in the magnetic disk due to residual magnetism remaining in the recording head can be eliminated.

    摘要翻译： 本发明的实施例防止在垂直磁记录系统的磁盘装置内的电源故障的情况下发生写磁头擦除。 根据本发明的一个实施例，记录电流流过磁头以将数据记录在磁盘中。 检测到磁盘装置发生电力故障。 当发生电源故障时，在断电的情况下，记录头被电力消磁。 在记录头退磁之后，记录头被卸载。 对于断电的电源，可以利用主轴电机的反电动势。 结果，可以消除由于记录头中剩余磁性而记录在磁盘上的数据所产生的影响。

    Disk storage device and control method for the same
    2.
    发明申请
    Disk storage device and control method for the same 有权
    磁盘存储设备和控制方法相同

    公开(公告)号：US20070153412A1

    公开(公告)日：2007-07-05

    申请号：US11588863

    申请日：2006-10-27

    申请人： Sumie Takeda ,  Katsumoto Onoyama ,  Yosuke Hamada ,  Hiroyuki Oosawa

    发明人： Sumie Takeda ,  Katsumoto Onoyama ,  Yosuke Hamada ,  Hiroyuki Oosawa

    IPC分类号： G11B19/02 ,  G11B15/04

    CPC分类号： G11B19/04 ,  G11B5/40

    摘要： Embodiments in accordance with the present invention provide a disk storage device and a control method for the disk storage device, which are capable of precluding an off-track write resulted from stick-slip caused by thermal distortion. A magnetic disk device is provided with a magnetic disk, a head that makes a writing to the magnetic disk, and a temperature sensor that detects the temperature inside of the magnetic disk device. Moreover, the magnetic disk device 1 changes determination requirements for use to make a determination whether or not to prohibit the writing by the head to the magnetic disk based on a measurement temperature detected by the temperature sensor and an amount of temperature change calculated using the measurement temperature.

    摘要翻译： 根据本发明的实施例提供一种用于盘存储装置的盘存储装置和控制方法，其能够排除由热失真引起的粘滑现象造成的偏离轨迹写入。 磁盘装置设置有磁盘，对磁盘进行写入的磁头以及检测磁盘装置内的温度的温度传感器。 此外，磁盘装置1改变用于确定是否基于由温度传感器检测的测量温度和使用该测量计算的温度变化量来禁止磁头对磁盘的写入的确定要求 温度。

    Disk storage device and control method for the same
    3.
    发明授权
    Disk storage device and control method for the same 有权
    磁盘存储设备和控制方法相同

    公开(公告)号：US07872826B2

    公开(公告)日：2011-01-18

    申请号：US11588863

    申请日：2006-10-27

    申请人： Sumie Takeda ,  Katsumoto Onoyama ,  Yosuke Hamada ,  Hiroyuki Oosawa

    发明人： Sumie Takeda ,  Katsumoto Onoyama ,  Yosuke Hamada ,  Hiroyuki Oosawa

    IPC分类号： G11B19/02 ,  G11B15/04

    CPC分类号： G11B19/04 ,  G11B5/40

    摘要： Embodiments in accordance with the present invention provide a disk storage device and a control method for the disk storage device, which are capable of precluding an off-track write resulted from stick-slip caused by thermal distortion. A magnetic disk device is provided with a magnetic disk, a head that makes a writing to the magnetic disk, and a temperature sensor that detects the temperature inside of the magnetic disk device. Moreover, the magnetic disk device 1 changes determination requirements for use to make a determination whether or not to prohibit the writing by the head to the magnetic disk based on a measurement temperature detected by the temperature sensor and an amount of temperature change calculated using the measurement temperature.

    摘要翻译： 根据本发明的实施例提供一种用于盘存储装置的盘存储装置和控制方法，其能够排除由热失真引起的粘滑现象造成的偏离轨迹写入。 磁盘装置设置有磁盘，对磁盘进行写入的磁头以及检测磁盘装置内的温度的温度传感器。 此外，磁盘装置1改变用于确定是否基于由温度传感器检测的测量温度和使用该测量计算的温度变化量来禁止磁头对磁盘的写入的确定要求 温度。

    Disk device having a function to confirm that a selected head is proper for a disk surface
    4.
    发明授权
    Disk device having a function to confirm that a selected head is proper for a disk surface 失效
    具有确定所选择的磁头适用于磁盘表面的功能的磁盘设备

    公开(公告)号：US07154688B2

    公开(公告)日：2006-12-26

    申请号：US10365394

    申请日：2003-02-13

    申请人： Iwao Oshimi ,  Kiyotada Itou ,  Katsumoto Onoyama ,  Yosuke Hamada

    发明人： Iwao Oshimi ,  Kiyotada Itou ,  Katsumoto Onoyama ,  Yosuke Hamada

    IPC分类号： G11B5/09

    CPC分类号： G11B5/012 ,  G11B5/4886 ,  G11B5/5521 ,  G11B5/58 ,  G11B5/59627 ,  G11B20/10 ,  G11B27/3027 ,  G11B2020/1234 ,  G11B2220/20

    摘要： In a disk device in which heads are positioned by a servo mechanism, the object of the present invention is to prevent data from being destroyed by incorrect selection of a head and to improve reliability in recording or reproducing information and to prevent format efficiency from being decreased thereby.For this object, a SAM pattern in a servo information region is changed for each head and recorded. Then, the SAM pattern is read to determine which head makes access to a disk surface and the head is compared with a head to which a direction of making access is given thereby to make an error check. Moreover, by the use of a marker pattern of rotational synchronization compensating data added to the servo information, an error check of the head making access to the disc surface is conducted.

    摘要翻译： 在其中磁头由伺服机构定位的磁盘装置中，本发明的目的是防止数据被不正确的磁头选择所破坏，并提高记录或再现信息的可靠性，并防止格式效率降低 从而。 为此目的，针对每个磁头改变伺服信息区域中的SAM模式并进行记录。 然后，读取SAM模式以确定哪个磁头访问磁盘表面，并且将磁头与提供访问方向的磁头进行比较以进行错误检查。 此外，通过使用添加到伺服信息的旋转同步补偿数据的标记图案，进行对盘表面的访问的磁头的错误检查。

    Recording method, unload method, and magnetic disk
    6.
    发明申请
    Recording method, unload method, and magnetic disk 失效
    记录方法，卸载方法和磁盘

    公开(公告)号：US20080024897A1

    公开(公告)日：2008-01-31

    申请号：US11881436

    申请日：2007-07-27

    申请人： Sumie Takeda ,  Katsumoto Onoyama ,  Iwao Oshimi ,  Hiroyuki Oosawa

    发明人： Sumie Takeda ,  Katsumoto Onoyama ,  Iwao Oshimi ,  Hiroyuki Oosawa

    IPC分类号： G11B15/04

    CPC分类号： G11B19/04 ,  G11B21/12

    摘要： Embodiments of the present invention prevent occurrence of a write pole erasure in the event of a power failure within a magnetic disk apparatus of a perpendicular magnetic recording system. According to one embodiment of the present invention, a recording current is flowed through a magnetic head to record data in a magnetic disk. An occurrence of a power failure in the magnetic disk apparatus is detected. When a power failure has occurred, the recording head is demagnetized with power in case of a power failure. The recording head is unloaded after the recording head has been demagnetized. For the power in case of a power failure, back electromotive force of a spindle motor can be utilized. As a result, effects exerted on data recorded in the magnetic disk due to residual magnetism remaining in the recording head can be eliminated.

    摘要翻译： 本发明的实施例防止在垂直磁记录系统的磁盘装置内的电源故障的情况下发生写磁头擦除。 根据本发明的一个实施例，记录电流流过磁头以将数据记录在磁盘中。 检测到磁盘装置发生电力故障。 当发生电源故障时，在断电的情况下，记录头被电力消磁。 在记录头退磁之后，记录头被卸载。 对于断电的电源，可以利用主轴电机的反电动势。 结果，可以消除由于记录头中剩余磁性而记录在磁盘上的数据所产生的影响。

    Magnetic disk drive and control method thereof
    7.
    发明授权
    Magnetic disk drive and control method thereof 失效
    磁盘驱动器及其控制方法

    公开(公告)号：US06909575B2

    公开(公告)日：2005-06-21

    申请号：US10199233

    申请日：2002-07-19

    申请人： Yoshio Soyama ,  Yuji Hata ,  Katsumoto Onoyama

    发明人： Yoshio Soyama ,  Yuji Hata ,  Katsumoto Onoyama

    IPC分类号： G11B21/02 ,  G11B5/55 ,  G11B21/08 ,  G11B33/14 ,  G11B5/596

    CPC分类号： G11B33/1406 ,  G11B5/5534 ,  G11B5/5547 ,  G11B5/5565

    摘要： In a magnetic disk drive that performs the seek operation of a magnetic head by a VCM, a characteristic that is excellent in fault tolerance that will not generate a fault in severe environment, such as a high temperature and the issue of high frequency command without requiring a special device and special operation and without deteriorating access performance.For this purpose, a VCM current and a VCM voltage are measured and VCM back electromotive force is calculated based on both results. At seek operation, position information located on a magnetic disk is sampled and a traveling velocity is detected from the difference of the sampled result. VCM coil temperature is estimated from the difference between the traveling velocity and the VCM back electromotive force. The magnetic disk drive moves low velocity seek mode when the estimated value of this VCM coil temperature exceeded a specified value.

    摘要翻译： 在通过VCM执行磁头的寻道操作的磁盘驱动器中，具有优异的容错性能的特性，在恶劣的环境（例如高温）和高频命令的问题下不会产生故障，而不需要 专用设备和特殊操作，不会恶化访问性能。 为此，测量VCM电流和VCM电压，并基于两个结果计算VCM反电动势。 在寻道操作中，对位于磁盘上的位置信息进行采样，并根据采样结果的差异来检测行驶速度。 VCM线圈温度由行进速度与VCM反电动势的差值估算。 当该VCM线圈温度的估计值超过规定值时，磁盘驱动器移动低速寻道模式。

    Apparatus for positioning magnetic head and method of the same
    9.
    发明授权
    Apparatus for positioning magnetic head and method of the same 失效
    磁头定位装置及其方法

    公开(公告)号：US5986845A

    公开(公告)日：1999-11-16

    申请号：US823837

    申请日：1997-03-25

    申请人： Takashi Yamaguchi ,  Katsuhiro Tsuneta ,  Katsumoto Onoyama ,  Tsuyoshi Arai ,  Yoshikatsu Fujii ,  Hidehiko Numasato ,  Yosuke Hamada ,  Masahito Kobayashi

    发明人： Takashi Yamaguchi ,  Katsuhiro Tsuneta ,  Katsumoto Onoyama ,  Tsuyoshi Arai ,  Yoshikatsu Fujii ,  Hidehiko Numasato ,  Yosuke Hamada ,  Masahito Kobayashi

    IPC分类号： G11B21/10 ,  G11B5/596 ,  G11B19/04 ,  G11B21/02

    CPC分类号： G11B5/59605 ,  G11B19/04

    摘要： An apparatus for positioning a magnetic head includes a servo signal detection circuit for detecting a servo signal recorded on a magnetic disk in a predetermined first period, an acceleration measuring portion which is fitted to a part of a mechanism for mounting a magnetic head, outputs an acceleration signal in a direction of positioning the magnetic head, and samples the acceleration signal in a second period shorter than the first period, a comparison processing portion for comparing a deviation value computed from at least either one of the acceleration signal and the servo signal with a predetermined value, a write inhibit signal generating portion for generating a signal inhibiting write of data on a magnetic disk in accordance with the result of comparison in the comparison processing portion, and a manipulated variable compensation portion for generating manipulated variable for adjusting the position of the magnetic head from at least either one of the servo signal and the acceleration signal and a target value of the position of the magnetic head, whereby to prevent erroneous write operation of data onto a magnetic disk due to unsteady positioning error of the magnetic head.

    摘要翻译： 用于定位磁头的装置包括：伺服信号检测电路，用于在预定的第一时段内检测记录在磁盘上的伺服信号;加速度测量部分，其安装在用于安装磁头的机构的一部分上， 加速度信号，并且在比第一期间短的第二期间对加速度信号进行采样，比较处理部，将从加速度信号和伺服信号中的至少一个计算的偏差值与 写入禁止信号产生部分，用于根据比较处理部分中的比较结果产生禁止在磁盘上写入数据的信号;以及操作变量补偿部分，用于产生用于调整位置的位置的调节变量 来自伺服信号和a中的至少一个的磁头 加速信号和磁头的位置的目标值，由此由于磁头的不稳定的定位误差而导致数据在磁盘上的错误写入操作。