Method and apparatus for partial self-servo writing using servo wedge propagation
    1.
    发明授权
    Method and apparatus for partial self-servo writing using servo wedge propagation 有权
    使用伺服楔形传播的部分自伺服写入的方法和装置

    公开(公告)号:US07050260B1

    公开(公告)日:2006-05-23

    申请号:US10293904

    申请日:2002-11-12

    IPC分类号: G11B21/02

    CPC分类号: G11B5/59633 G11B5/59666

    摘要: A method and apparatus for partial self-servo writing a disk surface in a disk drive using servo wedge propagation is provided. In one embodiment, servo information is written by a servo track writer near an outer diameter of the disk surface. The servo information is grouped into a 1× set of servo information and a 2× set of servo information. The disk drive's read head is used to read the 1× set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 2× set of servo information. Then, the disk drive's read head is used to read the 2× set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 1× set of servo information. The process is repeated on a track-by-track basis until servo information is written from the outer diameter of the disk surface to the inner diameter of the disk surface, as if it was entirely written by a servo track writer.

    摘要翻译: 提供了一种使用伺服楔形传播将部分自伺服写入盘驱动器中的盘表面的方法和装置。 在一个实施例中,伺服信息由靠近盘表面的外径的伺服轨迹写入器写入。 伺服信息分为1组伺服信息和2组伺服信息。 磁盘驱动器的读取头用于读取1x组伺服信息,以便将磁盘驱动器的写入头定位成与2组伺服信息径向对齐的伺服信息。 然后,磁盘驱动器的读取头用于读取2组伺服信息,以便将磁盘驱动器的写入头定位成写入与1组伺服信息径向对齐的伺服信息。 在逐个轨道的基础上重复该过程,直到从盘表面的外径到盘表面的内径写入伺服信息为止,就好像完全由伺服记录器写入。

    Method and apparatus for partial self-servo writing using servo wedge propagation
    2.
    发明授权
    Method and apparatus for partial self-servo writing using servo wedge propagation 有权
    使用伺服楔形传播的部分自伺服写入的方法和装置

    公开(公告)号:US07355808B1

    公开(公告)日:2008-04-08

    申请号:US11439731

    申请日:2006-05-23

    IPC分类号: G11B21/02

    CPC分类号: G11B5/59633 G11B5/59666

    摘要: A method and apparatus for partial self-servo writing a disk surface in a disk drive using servo wedge propagation is provided. In one embodiment, servo information is written by a servo track writer near an outer diameter of the disk surface. The servo information is grouped into a 1x set of servo information and a 2x set of servo information. The disk drive's read head is used to read the 1x set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 2x set of servo information. Then, the disk drive's read head is used to read the 2x set of servo information in order to position the disk drive's write head to write servo information which is radially-aligned with the 1x set of servo information. The process is repeated on a track-by-track basis until servo information is written from the outer diameter of the disk surface to the inner diameter of the disk surface, as if it was entirely written by a servo track writer.

    摘要翻译: 提供了一种使用伺服楔形传播将部分自伺服写入盘驱动器中的盘表面的方法和装置。 在一个实施例中,伺服信息由靠近盘表面的外径的伺服轨迹写入器写入。 伺服信息分为1组伺服信息和2组伺服信息。 磁盘驱动器的读取头用于读取1 x组伺服信息,以便将磁盘驱动器的写入头定位成写入与2 x伺服信息集径向对齐的伺服信息。 然后,磁盘驱动器的读取头用于读取2 x组伺服信息,以便将磁盘驱动器的写入头定位成写入与1 x伺服信息集径向对齐的伺服信息。 在逐个轨道的基础上重复该过程,直到从盘表面的外径到盘表面的内径写入伺服信息为止,就好像完全由伺服记录器写入。

    Disk drive head touchdown detection with improved discrimination
    4.
    发明授权
    Disk drive head touchdown detection with improved discrimination 有权
    磁盘驱动头触地得分检测具有改进的辨别力

    公开(公告)号:US07158325B1

    公开(公告)日:2007-01-02

    申请号:US10984559

    申请日:2004-11-08

    IPC分类号: G11B15/18

    CPC分类号: G11B5/59627 G11B5/6076

    摘要: A disk drive detects head touchdown based on a magnitude of a position error signal at a discrete frequency. The discrete frequency is one-half the disk rotation frequency or an integral multiple of the disk rotation frequency. The head is heated by turning on a heater at the discrete frequency, thereby injecting bias into a servo system that increases the PES magnitude. In addition, the servo system has a first transfer function for tracking the head during read and write operations and a second transfer function for tracking the head during head touchdown detection. The second transfer function has smaller vibration rejection than the first transfer function so that the disk drive is less sensitive to vibration during read and write operations than during head touchdown detection.

    摘要翻译: 磁盘驱动器基于离散频率处的位置误差信号的大小来检测磁头触地。 离散频率是磁盘旋转频率的一半或磁盘旋转频率的整数倍。 通过以离散频率打开加热器来加热头部,从而将偏压注入到增加PES量值的伺服系统中。 此外,伺服系统具有用于在读取和写入操作期间跟踪头部的第一传递功能,以及用于在头部触地检测期间跟踪头部的第二传递功能。 第二传递函数具有比第一传递函数更小的振动抑制,使得磁盘驱动器在读取和写入操作期间比在头部触地检测期间对振动较不敏感。

    Method and apparatus for determining embedded runout correction values when self-servo writing or partial self-servo writing a disk drive
    6.
    发明授权
    Method and apparatus for determining embedded runout correction values when self-servo writing or partial self-servo writing a disk drive 失效
    当自动伺服写入或部分自动伺服写入磁盘驱动器时,确定嵌入式跳动校正值的方法和装置

    公开(公告)号:US07106542B1

    公开(公告)日:2006-09-12

    申请号:US10318315

    申请日:2002-12-11

    IPC分类号: G11B21/02

    摘要: A method and apparatus for determining embedded runout correction values when self-servo writing or partial self-servo writing is disclosed. In one embodiment, a disk surface, which has servo information written thereon, is provided. The servo information is grouped into 1x servo sectors and 2x servo sectors, and the 1x servo sectors and the 2x servo sectors form a plurality of tracks. A read head servos on the 1x servo sectors associated with a track. Both position error signals due to repeatable runout for the 1x servo sectors and information related to position error signals due to repeatable runout for the 2x servo sectors are determined, while servoing on the 1x servo sectors. Embedded runout correction values for the 1x servo sectors and the 2x servo sectors are calculated.

    摘要翻译: 一种当自动伺服写入或部分自伺服写入时确定嵌入的跳动校正值的方法和装置。 在一个实施例中,提供了其上写有伺服信息的盘表面。 伺服信息被分组为1×伺服扇区和2×伺服扇区,1×伺服扇区和2×伺服扇区形成多个轨道。 与磁道相关的1个伺服扇区上的读头伺服。 由于1 x伺服扇区的可重复跳动和由于2 x伺服扇区的可重复跳动引起的与位置误差信号相关的信息,确定了两个位置误差信号,同时在1个伺服扇区上进行伺服。 计算1 x伺服扇区和2 x伺服扇区的嵌入式跳动校正值。

    Methods and structure for improved disk head switching to avoid zipper zones
    7.
    发明授权
    Methods and structure for improved disk head switching to avoid zipper zones 有权
    改善磁头切换以避免拉链区域的方法和结构

    公开(公告)号:US07679851B1

    公开(公告)日:2010-03-16

    申请号:US11122838

    申请日:2005-05-05

    IPC分类号: G11B5/09

    CPC分类号: G11B5/59616 G11B5/012

    摘要: Methods and structure for switching heads on a multiple recording surface disk drive that uses bi-directional radial writing toward a zipper zone at a middle diameter. When switching from a first head to a second head, features and aspects hereof assure that the second head will not be positioned in the zipper zone of the corresponding second surface and hence will not lose track following servo synchronization and control. In one aspect, added buffer or guard tracks having valid servo information but no data are added on either side of the zipper zone to assure that under the worst-case misalignment of surfaces the second head will not be positioned in its corresponding zipper zone when switching from the first head.

    摘要翻译: 在多个记录表面磁盘驱动器上切换磁头的方法和结构,其使用向中间直径的拉链区域进行双向径向书写。 当从第一头切换到第二头部时,其特征和方面确保第二头部不会被定位在相应的第二表面的拉链区域中,因此在伺服同步和控制之后不会失去跟踪。 在一个方面,在拉链区域的任一侧添加了具有有效的伺服信息而没有数据的附加的缓冲器或保护轨道,以确保在最差的表面未对准的情况下,当切换时,第二头部将不位于相应的拉链区域 从第一个头。

    Method and apparatus for performing a self-servo write operation in a disk drive using spiral servo information
    8.
    发明授权
    Method and apparatus for performing a self-servo write operation in a disk drive using spiral servo information 有权
    在使用螺旋伺服信息的磁盘驱动器中执行自伺服写入操作的方法和装置

    公开(公告)号:US07230789B1

    公开(公告)日:2007-06-12

    申请号:US11102467

    申请日:2005-04-08

    IPC分类号: G11B21/02

    CPC分类号: G11B5/59633 G11B5/59661

    摘要: The present invention is directed to a method and apparatus for performing a self-servo write operation in a disk drive. In one embodiment, the disk drive includes a disk surface having a read head and a write head associated therewith. Spiral servo information is written onto the disk surface using a servo track writer. The read head reads the spiral servo information and is used to position the write head, which writes a small band of final servo information onto the disk surface. The small band of final servo information may be embedded servo information. Importantly, the small band of final servo information is not written using the servo track writer. The write head is also used to write self-servo write instructions into the small band of final servo information. Subsequently, the self-servo write instructions are read and a self-servo write operation is performed using the spiral servo information.

    摘要翻译: 本发明涉及一种用于在磁盘驱动器中执行自伺服写入操作的方法和装置。 在一个实施例中,盘驱动器包括具有读头的盘表面和与其相关联的写头。 使用伺服记录器将螺旋伺服信息写入磁盘表面。 读头读取螺旋伺服信息,并用于将写入头定位在磁盘表面上,将写入磁头写入最小伺服信息的一小段。 最终伺服信息的小带可以是嵌入式伺服信息。 重要的是,最终的伺服信息的小带没有使用伺服记录器写入。 写头还用于将自伺服写指令写入最终伺服信息的小波段。 随后,读取自伺服写指令,并使用螺旋伺服信息执行自伺服写操作。

    Method and apparatus for determining embedded runout correction values
    10.
    发明授权
    Method and apparatus for determining embedded runout correction values 有权
    确定嵌入式跳动校正值的方法和装置

    公开(公告)号:US07054096B1

    公开(公告)日:2006-05-30

    申请号:US10338047

    申请日:2003-01-06

    IPC分类号: G11B5/596

    摘要: A method and apparatus for compensating for non-linearities due to pivot bearing friction when determining embedded runout correction values during partial self-servo write of a disk drive is disclosed. In one embodiment, the disk drive includes a disk surface having a track written thereon and the track has some written-in runout. The written-in runout that is associated with high-frequencies is determined using a first technique. The written-in runout for the track that is associated with low frequencies is determined using a second technique. Results from the two techniques are combined in order to determine embedded runout correction values for the track when partial self-servo writing, in order to reduce error propagation when writing additional tracks.

    摘要翻译: 公开了一种在磁盘驱动器的部分自伺服写入期间确定嵌入的跳动校正值时补偿由于枢转轴承摩擦导致的非线性的方法和装置。 在一个实施例中,盘驱动器包括具有写在其上的轨道的盘表面,并且轨道具有一些写入的跳动。 使用第一技术确定与高频相关联的写入跳动。 使用第二种技术确定与低频相关的轨道的写入跳动。 组合两种技术的结果,以便在部分自伺服写入时确定轨道的嵌入式跳动校正值,以便在写入附加轨道时减少误差传播。