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    Write quality of HDD heads experiencing temporary fly-height problems
    1.
    发明授权
    Write quality of HDD heads experiencing temporary fly-height problems 有权
    写入硬盘头的质量遇到临时飞高问题

    公开(公告)号：US08068306B2

    公开(公告)日：2011-11-29

    申请号：US12637408

    申请日：2009-12-14

    申请人： Lakshmi Ramamoorthy ,  David Jen ,  Douglas Zuercher ,  Masayoshi Shimokoshi ,  Kris Schouterden

    发明人： Lakshmi Ramamoorthy ,  David Jen ,  Douglas Zuercher ,  Masayoshi Shimokoshi ,  Kris Schouterden

    IPC分类号： G11B21/02 ,  G11B15/04

    CPC分类号： G11B5/6064 ,  G11B5/6005

    摘要： Approaches for improving the write quality of a hard-disk drive (HDD) head experiencing temporary fly-height problem. When the hard-disk drive is idle and heads are parked on the ramp, fluid, such as a lubricant or the condensation of vapor, may collect between the surface of a platter and the head or a slider, thereby causing the head to temporarily fly higher than normal. An HDD may include electronic component(s) configured to (a) determine whether it is likely that fluid is interposed between the surface of a magnetic-recording disk and the slider or the head, and (b) temporarily adjust one or more of (i) a thermal fly height control setting of the head and (ii) a write parameter of the head to compensate for the head flying higher than normal as a result of the fluid being interposed between the surface of the disk and the slider or the head.

    摘要翻译： 提高硬盘驱动器（HDD）头部经历暂时飞高问题的写入质量的方法。 当硬盘驱动器空闲并且头部停放在斜坡上时，流体（例如润滑剂或蒸气冷凝）可以在盘片的表面与头部或滑块之间收集，从而导致头部暂时飞行 高于正常 HDD可以包括被配置为（a）确定在磁记录盘的表面和滑块或头之间是否存在流体的电子部件，以及（b）暂时调整一个或多个 i）头部的热飞行高度控制设置和（ii）头部的写入参数，以补偿头部飞行高于正常，这是因为流体插入在盘的表面和滑块或头部之间 。

    Write Quality of HDD Heads Experiencing Temporary Fly-Height Problems
    2.
    发明申请
    Write Quality of HDD Heads Experiencing Temporary Fly-Height Problems 有权
    写硬盘头的质量遇到临时飞高问题

    公开(公告)号：US20110141607A1

    公开(公告)日：2011-06-16

    申请号：US12637408

    申请日：2009-12-14

    申请人： Lakshmi Ramamoorthy ,  David Jen ,  Douglas Zuercher ,  Masayoshi Shimokoshi ,  Kris Schouterden

    发明人： Lakshmi Ramamoorthy ,  David Jen ,  Douglas Zuercher ,  Masayoshi Shimokoshi ,  Kris Schouterden

    IPC分类号： G11B21/02

    CPC分类号： G11B5/6064 ,  G11B5/6005

    摘要： Approaches for improving the write quality of a hard-disk drive (HDD) head experiencing temporary fly-height problem. When the hard-disk drive is idle and heads are parked on the ramp, fluid, such as a lubricant or the condensation of vapor, may collect between the surface of a platter and the head or a slider, thereby causing the head to temporarily fly higher than normal. An HDD may include electronic component(s) configured to (a) determine whether it is likely that fluid is interposed between the surface of a magnetic-recording disk and the slider or the head, and (b) temporarily adjust one or more of (i) a thermal fly height control setting of the head and (ii) a write parameter of the head to compensate for the head flying higher than normal as a result of the fluid being interposed between the surface of the disk and the slider or the head.

    摘要翻译： 提高硬盘驱动器（HDD）头部经历暂时飞高问题的写入质量的方法。 当硬盘驱动器空闲并且头部停放在斜坡上时，流体（例如润滑剂或蒸气冷凝）可以在盘片的表面与头部或滑块之间收集，从而导致头部暂时飞行 高于正常 HDD可以包括被配置为（a）确定在磁记录盘的表面和滑块或头之间是否存在流体的电子部件，以及（b）暂时调整一个或多个 i）头部的热飞行高度控制设置和（ii）头部的写入参数，以补偿头部飞行高于正常，这是因为流体插入在盘的表面和滑块或头部之间 。

    Magnetic disk drive improved in a reliability of data retrieve
    5.
    发明授权
    Magnetic disk drive improved in a reliability of data retrieve 失效

    公开(公告)号：US07110203B2

    公开(公告)日：2006-09-19

    申请号：US10231268

    申请日：2002-08-30

    申请人： Masayoshi Shimokoshi

    发明人： Masayoshi Shimokoshi

    IPC分类号： G11B27/36 ,  G11B5/09

    CPC分类号： G11B27/3027 ,  G11B5/012 ,  G11B20/10 ,  G11B27/36 ,  G11B2020/10898 ,  G11B2220/20

    摘要： A magnetic disk drive improved in reliability of data retrieve. This invention prevents the drive from decoding already-written old data. The failure decoding is caused by a deviation in a write operation, by a malfunction of a writing head and so on. When data in a sector is renewed, the sector's location and renewal frequency information are saved not only in the sector of the disk media but also in a temporary memory. When the magnetic disk drive is in an idle mode, those renewal information written in the sector and stored in the temporary memory, are checked. If both renewal information match, the data is regarded “not old” and the information about the sector in the temporary memory is deleted. In the deleting operation, check mark information indicating that the written data has been checked is written in the sector of the magnetic disk medium.

    Recording current control method and magnetic disk drive
    6.
    发明授权
    Recording current control method and magnetic disk drive 失效
    记录电流控制方法和磁盘驱动器

    公开(公告)号：US07023641B2

    公开(公告)日：2006-04-04

    申请号：US10671806

    申请日：2003-09-26

    申请人： Takeshi Doi ,  Masayoshi Shimokoshi ,  Hitoshi Yoshida

    发明人： Takeshi Doi ,  Masayoshi Shimokoshi ,  Hitoshi Yoshida

    IPC分类号： G11B5/02

    CPC分类号： G11B5/09

    摘要： In a magnetic disk drive, a writing element and its surrounding area thermally expand due to the heat generated by a write head coil. The transient phenomenon of such thermal expansion may invoke the transient phenomenon of inadequate writing capacity, thereby causing a writing error at an early stage of a write operation. Control is provided which increases/decreases either or both the write current to be applied to a write head and the amount of its overshoot on an individual sector basis during a writing sequence.

    摘要翻译： 在磁盘驱动器中，写入元件及其周围区域由于写入头部线圈产生的热而热膨胀。 这种热膨胀的瞬态现象可能引起写入能力不足的瞬态现象，从而在写入操作的早期引起写入错误。 提供了控制，其在写入序列期间增加/减少要施加到写入头的写入电流和其在每个扇区上的过冲量的一个或两个。

    Magnetic disk drive and read/write method to reduce read error rate
    7.
    发明授权
    Magnetic disk drive and read/write method to reduce read error rate 失效
    磁盘驱动器和读/写方式降低读错误率

    公开(公告)号：US07369351B2

    公开(公告)日：2008-05-06

    申请号：US11286182

    申请日：2005-11-22

    申请人： Kazuyuki Date ,  Masayoshi Shimokoshi

    发明人： Kazuyuki Date ,  Masayoshi Shimokoshi

    IPC分类号： G11B5/596 ,  G11B5/09

    CPC分类号： G11B5/59627 ,  G11B5/455 ,  G11B19/04 ,  G11B2005/001

    摘要： Embodiments of the invention reduce the error rate of a read error that is caused by a spacing interval between a write head and a read head, which are formed on a slider. In one embodiment, a write head writes user data, which is placed at a position, on a magnetic disk when a read head is placed at a target position in accordance with a head spacing interval and yaw angle. DHO adjustment data is written at a second position, which is obtained by subjecting the read head to DHO correction in order to read the user data written at the target position. When the user data is to be read, a processor reads the DHO adjustment data, changes the read head position to the first position, and controls the operation of a magnetic disk drive to read the user data.

    摘要翻译： 本发明的实施例降低了由在滑块上形成的写入头和读取头之间的间隔间隔引起的读取错误的错误率。 在一个实施例中，当根据磁头间隔间隔和偏航角将读取头放置在目标位置时，写入头将放置在一个位置的用户数据写入磁盘上。 将DHO调整数据写入第二位置，该第二位置通过对读取头进行DHO校正而获得，以便读取写入目标位置的用户数据。 当读取用户数据时，处理器读取DHO调整数据，将读取头位置改变到第一位置，并控制磁盘驱动器的操作以读取用户数据。

    Magnetic disk drive and read/write method to reduce read error rate
    8.
    发明申请
    Magnetic disk drive and read/write method to reduce read error rate 失效
    磁盘驱动器和读/写方式降低读错误率

    公开(公告)号：US20060139791A1

    公开(公告)日：2006-06-29

    申请号：US11286182

    申请日：2005-11-22

    申请人： Kazuyuki Date ,  Masayoshi Shimokoshi

    发明人： Kazuyuki Date ,  Masayoshi Shimokoshi

    IPC分类号： G11B5/596

    CPC分类号： G11B5/59627 ,  G11B5/455 ,  G11B19/04 ,  G11B2005/001

    摘要： Embodiments of the invention reduce the error rate of a read error that is caused by a spacing interval between a write head and a read head, which are formed on a slider. In one embodiment, a write head writes user data, which is placed at a position, on a magnetic disk when a read head is placed at a target position in accordance with a head spacing interval and yaw angle. DHO adjustment data is written at a second position, which is obtained by subjecting the read head to DHO correction in order to read the user data written at the target position. When the user data is to be read, a processor reads the DHO adjustment data, changes the read head position to the first position, and controls the operation of a magnetic disk drive to read the user data.

    摘要翻译： 本发明的实施例降低了由在滑块上形成的写入头和读取头之间的间隔间隔引起的读取错误的错误率。 在一个实施例中，当根据磁头间隔间隔和偏航角将读取头放置在目标位置时，写入头将放置在一个位置的用户数据写入磁盘上。 将DHO调整数据写入第二位置，该第二位置通过对读取头进行DHO校正而获得，以便读取写入目标位置的用户数据。 当读取用户数据时，处理器读取DHO调整数据，将读取头位置改变到第一位置，并控制磁盘驱动器的操作以读取用户数据。

    Magnetic disk drive with a head oscillation function and the control method thereof
    9.
    发明授权
    Magnetic disk drive with a head oscillation function and the control method thereof 失效
    具有磁头振荡功能的磁盘驱动器及其控制方法

    公开(公告)号：US06747833B2

    公开(公告)日：2004-06-08

    申请号：US09887064

    申请日：2001-06-25

    申请人： Masayoshi Shimokoshi ,  Takeshi Doi

    发明人： Masayoshi Shimokoshi ,  Takeshi Doi

    IPC分类号： G11B5596

    CPC分类号： G11B5/012 ,  G11B5/5547 ,  G11B21/083

    摘要： The position information of the magnetic head is generated also from the data area to improve the positioning accuracy. The magnetic disk drive has a function of oscillating the magnetic head in the radial direction in the data area at a specific frequency and a function of detecting a read signal during the execution of the oscillation function and detects position information of the magnetic head from the detected read signal. The magnetic head position control can be performed in the data area. The magnetic head position signal not dependent on the frequency of a sampling signal generated from the servo information area can be generated. This in turn improves the data recording density and allows a highly precise position control of the magnetic head, thus improving the reliability of the magnetic disk drive.

    摘要翻译： 也可以从数据区域生成磁头的位置信息，以提高定位精度。 磁盘驱动器具有以特定频率在数据区域中径向振荡磁头的功能，以及在执行振荡功能期间检测读取信号的功能，并且从检测到的磁头驱动器检测磁头的位置信息 读信号。 可以在数据区域中执行磁头位置控制。 可以生成不依赖于从伺服信息区域产生的采样信号的频率的磁头位置信号。 这又提高了数据记录密度，并且允许磁头的高精度位置控制，从而提高了磁盘驱动器的可靠性。