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61. 发明授权

US6002540A Method and apparatus for rotary actuator arc compensation correction in a direct access storage device 失效
标题翻译：直接存取存储装置中的旋转执行器电弧补偿校正方法和装置
公开(公告)号：US6002540A
公开(公告)日：1999-12-14
申请号：US87825
申请日：1998-05-29
申请人： Earl Albert Cunningham , Kevin Jack Erickson , Hal Hjalmar Ottesen
发明人： Earl Albert Cunningham , Kevin Jack Erickson , Hal Hjalmar Ottesen
IPC分类号： G11B5/596 , G11B21/10
CPC分类号： G11B5/59644 , G11B21/106 , G11B5/59605 , G11B5/59655 , G11B5/59688
摘要： Rotary actuator arc compensation correction method and apparatus are provided for a direct access storage device (DASD). A reference feedforward correction signal is generated at each of a plurality of sectors around a predetermined track on a disk surface. A specific selected track is identified, and both magnitude and phase of the generated reference feedforward correction signal are modified to correct for the arced trajectory caused by the rotary actuator at the specific selected track. Improved actuator servo control is provided by using pseudo sector compensation to interpolate the feedforward correction signal between servo sectors.
摘要翻译：为直接存取存储设备（DASD）提供旋转执行器电弧补偿校正方法和装置。在盘表面上的预定轨道周围的多个扇区中的每一个处产生参考前馈校正信号。识别特定的所选轨道，并且修改所生成的参考前馈校正信号的幅度和相位，以校正由特定所选轨道处的旋转致动器引起的弧形轨迹。通过使用伪扇区补偿来在伺服扇区之间内插前馈校正信号来提供改进的致动器伺服控制。

62. 发明授权

US5995317A Method and apparatus for real-time filtering of a position error signal for a disk drive servo system 有权
公开(公告)号：US5995317A
公开(公告)日：1999-11-30
申请号：US235719
申请日：1999-01-22
申请人： Hal Hjalmar Ottesen
发明人： Hal Hjalmar Ottesen
IPC分类号： G11B5/55 , G11B5/596 , G11B21/08 , G11B21/10
CPC分类号： G11B21/083 , G11B21/106 , G11B5/5526 , G11B5/59622
摘要： A method and apparatus for real-time filtering of a position error signal in a servo system of a disk drive. Pre-calculated periodic components of the position error signal (PES) are used as future values in a real-time filter, preferably a real-time recursive median filter. This minimizes the amount of time-lag between obtaining the raw PES measurement from the disk surface and the providing the corresponding filtered PES output. This reduced time-lag minimizes the effect on the phase margin (PM) and results in improved servo stability. The invention can be used not only in servo systems in disk drives, but also in servo systems of other mechanical moving storage devices and in servo systems of rotating mechanical machinery in general, where the signal to be filtered may be a position error, velocity error, acceleration error, and the like.

63. 发明授权

US5920441A Method and apparatus for controlling a multiple-stage actuator for a disk drive 失效
公开(公告)号：US5920441A
公开(公告)日：1999-07-06
申请号：US532340
申请日：1995-09-22
申请人： Earl Albert Cunningham , Long-Sheng Fan , Hal Hjalmar Ottesen , Timothy Clark Reiley
发明人： Earl Albert Cunningham , Long-Sheng Fan , Hal Hjalmar Ottesen , Timothy Clark Reiley
IPC分类号： G11B5/55 , G11B5/596 , G11B7/085 , G11B7/09 , G11B21/08
CPC分类号： G11B7/0901 , G11B21/085 , G11B5/5552 , G11B5/5556 , G11B5/59605 , G11B5/59627 , G11B7/08505 , G11B7/08576 , G11B7/0937 , G11B7/0945
摘要： A method and apparatus for controlling a multiple-stage actuator for a disk drive which does not require an additional sensor for measuring the relative position between adjacent actuator stages. In a two-stage actuator system, a position-type secondary actuator (SA) rides piggyback on a primary actuator (PA). The repeatable runout is measured and used as a feedforward signal to the PA. If the PA is a rotary actuator, the feedforward signal is preferably arc corrected for the arc that the head transverses from the inner radius to the outer radius of the disk. Added to the feedforward signal is the moving average of the drive signal applied to the SA. Because the SA is of the position-type having a neutral position, this moving average is proportional to the time cumulative drift present in the two-stage actuator system, and forces the PA in a direction that minimizes deviation of the SA from its neutral position. This minimizes the range requirement for the SA, the main purpose of which is to reduce non-repeatable runout.

64. 发明授权

US5732215A System for equalizing operating temperature by allocating infrequently accessed data to the high temperature DASD and allocating frequently accessed data to the low temperature DASD 失效
标题翻译：通过将不常访问的数据分配给高温DASD并将经常访问的数据分配给低温DASD来均衡操作温度的系统
公开(公告)号：US5732215A
公开(公告)日：1998-03-24
申请号：US482821
申请日：1995-06-07
申请人： Zine-Eddine Boutaghou , Hal Hjalmar Ottesen
发明人： Zine-Eddine Boutaghou , Hal Hjalmar Ottesen
IPC分类号： G06F1/20 , G06F3/06 , G11B25/04 , G11B33/14 , G06F13/00
CPC分类号： G06F3/0616 , G06F3/0647 , G06F3/0689
摘要： An array of direct access storage devices (DASD's) such as disk drive units includes a temperature sensor for sensing the operating temperature of each DASD. The operating temperatures of the DASD's of the array are equalized by allocating frequently accessed data to drives with relatively low operating temperature and allocating infrequently accessed data to drives with relatively high operating temperatures. Operating temperature information is used to identify a DASD that has a high probability of failure and the DASD can be shut down for replacement prior to actual failure by moving all data from that DASD to one or more other DASD's of the array.
摘要翻译：诸如磁盘驱动器单元的直接访问存储设备（DASD）阵列包括用于感测每个DASD的工作温度的温度传感器。通过将经常访问的数据分配到具有较低工作温度的驱动器并将不常访问的数据分配给具有较高工作温度的驱动器，来平衡阵列的DASD的工作温度。工作温度信息用于识别具有高故障概率的DASD，并且可以通过将该DASD中的所有数据移动到阵列的一个或多个其他DASD来在实际故障之前关闭DASD进行更换。

65. 发明授权

US07694224B2 Location predicative restoration of compressed images stored on a hard disk drive with soft and hard errors 失效
标题翻译：存储在具有软和硬错误的硬盘驱动器上的压缩图像的位置谓词恢复
公开(公告)号：US07694224B2
公开(公告)日：2010-04-06
申请号：US09870803
申请日：2001-05-31
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G06F3/00 , G06F12/00
CPC分类号： G06F17/30017
摘要： Method, apparatus and signal bearing medium for processing multimedia data which improve server performance in rendering multimedia data. In one aspect, a method is provided for processing multimedia data without requiring utilization of the hard disk drive's data recovery procedure when soft or hard errors are encountered in connection with reading of the multimedia data from the hard disk drive. The method for processing multimedia data comprises: indexing the multimedia data to an i by j matrix; storing the i by j matrix in a data storage device utilizing odd/even index sequencing of the i by j matrix; retrieving data from the data storage device; and reconstructing the i by j matrix utilizing odd/even index sequencing of retrieved data.
摘要翻译：用于处理多媒体数据的方法，装置和信号承载介质，其提高了呈现多媒体数据的服务器性能。在一方面，提供了一种用于处理多媒体数据的方法，而不需要在从硬盘驱动器读取多媒体数据时遇到软或硬错误时利用硬盘驱动器的数据恢复过程。用于处理多媒体数据的方法包括：将多媒体数据索引到i乘j矩阵; 将i乘i矩阵存储在利用i乘j矩阵的奇数/偶数索引排序的数据存储装置中; 从数据存储设备检索数据; 并利用检索数据的奇数/偶数索引序列重建i个矩阵。

66. 发明授权

US06785079B2 Method and apparatus for estimating the flyheight of an airbearing slider in a storage device 失效
标题翻译：用于估计存储装置中的气动滑块的飞行高度的方法和装置
公开(公告)号：US06785079B2
公开(公告)日：2004-08-31
申请号：US09811287
申请日：2001-03-16
申请人： James Hammond Brannon , Hal Hjalmar Ottesen , Gordon James Smith
发明人： James Hammond Brannon , Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B2102
CPC分类号： G11B21/21 , G11B5/60 , G11B33/10
摘要： A method and apparatus for estimating the flyheight of an airbearing slider in a storage device. The slider floats on an airbearing over a rotating storage disk. The storage disk includes a washboard-sequence having washboard-sections each comprising surface profile variations having a different pitch. The pitches are selected from within a range of values likely to excite an airbearing resonance of the slider as the storage disk rotates at a rated storage disk velocity. For each of the washboard-sections, a maximum amplitude of flyheight modulation of the slider resulting from the slider floating over that washboard-section is measured. A determination is made of which washboard-section caused the largest measured flyheight modulation. The washboard-section having a pitch that provides an excitation frequency (when the disk is rotated at the rated storage disk velocity) that is closest to the actual airbearing resonance frequency of the slider will produce the largest flyheight modulation. The result of this determination is used to estimate the flyheight of the slider. For example, the flyheight may be estimated using an empirical formula that relates the flyheight and the resonance frequency. Once the flyheight is estimated, a determination may be made of whether the flyheight is unsatisfactory, e.g., below a minimum flyheight or decreasing. Appropriate action may be taken when the flyheight is unsatisfactory, such as notifying the user and/or scrubbing the slider. Accordingly, catastrophic head-crash may be avoided and the useful life of the storage device extended.
摘要翻译：一种用于估计存储装置中的气垫滑块的飞行高度的方法和装置。滑块浮动在旋转存储盘上的空气轴上。存储盘包括具有洗衣板部分的洗衣板顺序，每个部分包括具有不同间距的表面轮廓变化。在存储盘以额定的存储盘速度旋转时，从可能激发滑块的空气轴承共振的值的范围内选择间距。对于每个洗衣板部分，测量滑块浮动在该搓板板部分上的由滑块产生的飞行高度调制的最大振幅。确定哪个搓板部分导致最大测量的飞行高度调制。具有提供最接近滑块的实际空气轴承共振频率的激励频率（当盘以额定存储盘速度旋转）的间距的洗衣板部分将产生最大的高密度调制。该确定的结果用于估计滑块的高度。例如，可以使用关于飞行高度和共振频率的经验公式估计飞行高度。一旦估计飞行高度，可以确定飞行高度是否不令人满意，例如低于最小飞行高度或减小。当飞行高度不能令人满意时，例如通知用户和/或擦洗滑块，可以采取适当的动作。因此，可以避免灾难性的头部碰撞，并延长存储装置的使用寿命。

67. 发明授权

US06765745B2 Method and apparatus for in situ detection of high-flying sliders over customer data 失效
标题翻译：用于在客户数据上快速滑动的原位检测方法和装置
公开(公告)号：US06765745B2
公开(公告)日：2004-07-20
申请号：US10034798
申请日：2001-12-28
申请人： Gordon James Smith , Hal Hjalmar Ottesen
发明人： Gordon James Smith , Hal Hjalmar Ottesen
IPC分类号： G11B2102
CPC分类号： G11B5/6005 , G11B5/012 , G11B20/10009 , G11B20/10037 , G11B21/21 , G11B27/36 , G11B2220/20
摘要： A method and apparatus are provided for in situ detection of high-flying sliders over customer data. A sampled and digitized readback sequence x(n) from a logical data block of customer data is received. Bandpass filtered data of the readback sequence x(n) is generated and processed for generating a predefined harmonic ratio. The generated predefined harmonic ratio is compared with a predefined threshold value to identify a high-flying slider. Bandpass filtered data of the readback sequence x(n) is generated with a digital comb filter and a digital resonator. The bandpass filtered data of the readback sequence x(n) is either squared or the absolute value is taken for a predefined number of samples and then accumulatively summed for the predefined number of samples and the harmonic ratio is calculated. The generated predefined harmonic ratio is compared with a predefined threshold value that is determined as a function of head and disk parameters. During a read operation, an equalizer high-frequency boost is generated responsive to identifying a high-flying slider. During a write operation to a selected write location, the write operation is aborted responsive to identifying a high-flying slider near the selected write location.
摘要翻译：提供了一种方法和装置，用于通过客户数据原位检测高飞行滑块。接收来自客户数据的逻辑数据块的采样和数字化的回读序列x（n）。生成并处理回读序列x（n）的带通滤波数据，以产生预定谐波比。将所产生的预定义谐波比与预定阈值进行比较，以识别高飞行滑块。利用数字梳状滤波器和数字谐振器产生回读序列x（n）的带通滤波数据。回读序列x（n）的带通滤波数据是平方的，或者对于预定数量的采样采用绝对值，然后对于预定数量的采样累积相加，并且计算谐波比。将产生的预定义谐波比与作为磁头和磁盘参数的函数确定的预定阈值进行比较。在读取操作期间，响应于识别高飞行滑块而产生均衡器高频提升。在对所选择的写入位置的写入操作期间，响应于识别所选择的写入位置附近的高飞行滑块，写入操作被中止。

68. 发明授权

US06717763B2 Power savings method and apparatus for disk drives 失效
标题翻译：磁盘驱动器的节能方法和装置
公开(公告)号：US06717763B2
公开(公告)日：2004-04-06
申请号：US09859622
申请日：2001-05-16
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B2102
CPC分类号： G11B19/20 , G11B5/5521
摘要： A disk drive includes at least one disk having a disk surface and at least one transducer head for writing and/or reading data from the disk surface. The disk drive performs a power-saving idle operation including reducing a rotational speed of the disk, and continuously moving the transducer head at varying radial velocity components relative to the disk surface in a repeating sweeping pattern between a selected inner disk diameter and a selected outer disk diameter. The radial velocity components are varied as a function of the transducer head's radial position in relation to the disk surface, such as with a radial velocity idle sweep profile representing a relationship between the radial velocity component of the transducer head and its radial location relative to the disk surface that optimizes head-disk interaction (HDI) when the disk is rotating at a given reduced rotational speed.
摘要翻译：磁盘驱动器包括具有盘表面的至少一个盘和用于从盘表面写入和/或读取数据的至少一个换能器头。磁盘驱动器执行省电怠速操作，包括减小磁盘的转速，并以相对于磁盘表面的变化的径向速度分量以选定的内磁盘直径和所选外部之间的重复扫描模式连续移动换能器头部盘直径。径向速度分量作为换能器头相对于盘表面的径向位置的函数而变化，例如具有表示换能器头部的径向速度分量与其径向位置之间的关系的径向速度空转扫描轮廓磁盘表面，当磁盘以给定的减小的转速旋转时，可以优化磁头 - 磁盘交互（HDI）。

69. 发明授权

US06683737B2 Method and apparatus for predictive failure analysis technique for head crashes in hard drives using position error signal 有权
标题翻译：用于使用位置误差信号的硬盘驱动器中的头部崩溃的预测故障分析技术的方法和装置
公开(公告)号：US06683737B2
公开(公告)日：2004-01-27
申请号：US09909294
申请日：2001-07-19
申请人： Karl Gong , Hal Hjalmar Ottesen , Gordon James Smith
发明人： Karl Gong , Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B2736
CPC分类号： G11B27/36 , G11B5/59611 , G11B5/59627 , G11B2220/20
摘要： A position error signal indicative of the distance between an expected position of a magnetic head relative to the track centerline of a magnetic data storage and retrieval system and an actual position of the magnetic head relative to the track centerline is detected. An absolute value of the position error signal is determined and stored. The detection, determination, and storage is repeated over several revolutions of the magnetic data storage and retrieval system. A maximum of the absolute values of the position error signals is then determined and compared to a threshold value. If the maximum of the absolute values of the position error signals exceeds the threshold value, a warning signal is propagated. An alternative embodiment similarly predicts the possibility of head-disk crash on the basis of the maximum value of several samples of the squares of the position error signals.
摘要翻译：检测指示磁头相对于磁数据存储和检索系统的轨道中心线的预期位置与磁头相对于轨道中心线的实际位置之间的距离的位置误差信号。确定并存储位置误差信号的绝对值。在磁数据存储和检索系统的几圈内重复检测，确定和存储。然后确定位置误差信号的绝对值的最大值并将其与阈值进行比较。如果位置误差信号的绝对值的最大值超过阈值，则传播警告信号。替代实施例类似地基于位置误差信号的平方的几个样本的最大值来预测头盘碰撞的可能性。

70. 发明授权

US06678108B2 Method and apparatus for identifying spindle imbalance in a hard disk drive 失效
标题翻译：用于识别硬盘驱动器中的主轴不平衡的方法和装置
公开(公告)号：US06678108B2
公开(公告)日：2004-01-13
申请号：US09854637
申请日：2001-05-14
申请人： Gordon James Smith , Hal Hjalmar Ottesen
发明人： Gordon James Smith , Hal Hjalmar Ottesen
IPC分类号： G11B5596
CPC分类号： G11B5/59627
摘要： A method and apparatus are provided for identifying spindle imbalance in a hard disk drive. Position error signal (PES) samples are received from a plurality of sectors of a predefined cylinder for a plurality of disk surfaces. The PES samples are measured and stored for a defined number of revolutions for each of the plurality of disk surfaces. For each of the plurality of disk surfaces, a repeatable runout (RRO) of the PES is computed for the defined number of revolutions. A first harmonic discrete Fourier transform (DFT) and a first harmonic phase of the RRO are computed. Then a mean repeatable runout (MRRO) is computed. A first harmonic DFT and a first harmonic overall phase of the MRRO are computed. For each of the plurality of disk surfaces, cross-correlation coefficients are computed and summed to identify a spindle imbalance factor. The identified spindle imbalance factor is compared with a predefined threshold value to identify spindle imbalance in the hard disk drive. An available controller in the disk drive can perform the method to identify spindle imbalance. In a Redundant Arrays of Inexpensive Disks (RAID) system, the RAID controller performs the method to identify spindle imbalance.
摘要翻译：提供了一种用于识别硬盘驱动器中的主轴不平衡的方法和装置。从多个盘表面的预定圆筒的多个扇区接收位置误差信号（PES）样本。对于多个盘表面中的每一个，PES样品被测量并存储一定数量的转数。对于多个盘表面中的每一个，针对确定的转数计算PES的可重复跳动（RRO）。计算RRO的一次谐波离散付里叶变换（DFT）和一次谐波相位。然后计算平均可重复跳动（MRRO）。计算MRRO的一次谐波DFT和一次谐波整体相位。对于多个盘表面中的每一个，计算互相关系数并求和以识别主轴不平衡系数。将所识别的主轴不平衡因子与预定义的阈值进行比较，以识别硬盘驱动器中的主轴不平衡。磁盘驱动器中的可用控制器可以执行识别主轴不平衡的方法。在冗余磁盘阵列（RAID）系统中，RAID控制器执行识别主轴不平衡的方法。

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