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1. 发明授权

US5625508A Method and apparatus for servo demodulation in a direct access storage device 失效
标题翻译：一种直接存取存储装置伺服解调方法及装置
公开(公告)号：US5625508A
公开(公告)日：1997-04-29
申请号：US491103
申请日：1995-06-16
申请人： Dana H. Brown , Hal H. Ottesen , Gordon J. Smith
发明人： Dana H. Brown , Hal H. Ottesen , Gordon J. Smith
IPC分类号： G11B5/596
CPC分类号： G11B5/59611 , G11B5/59616
摘要： A method and apparatus are provided for servo demodulation in a direct access storage device. A readback signal is sensed from at least one disk surface and locations of positive and negative peaks in the sensed readback signal are detected for providing a detected peak signal. A square wave signal having a period variable with distance between detected locations of positive and negative peaks is generated using the detected peak signal and applied to a servo demodulator in the direct access storage device.
摘要翻译：提供了一种在直接存取存储装置中用于伺服解调的方法和装置。从至少一个盘表面感测回读信号，并检测感测的回读信号中的正峰值和负峰值的位置以提供检测到的峰值信号。使用所检测的峰值信号产生具有正值和负峰值的检测位置之间的距离的周期变化的方波信号，并将其应用于直接存取存储装置中的伺服解调器。

2. 发明授权

US5619387A Disk storage device with spiral data track and incremental error offsets in angularly spaced imbedded concentric servo patterns 失效
标题翻译：具有螺旋数据轨迹的磁盘存储设备和以角度间隔嵌入的同心伺服模式的增量误差偏移
公开(公告)号：US5619387A
公开(公告)日：1997-04-08
申请号：US689582
申请日：1996-08-12
申请人： Hal H. Ottesen , Earl A. Cunningham , Richard Greenberg , Dana H. Brown
发明人： Hal H. Ottesen , Earl A. Cunningham , Richard Greenberg , Dana H. Brown
IPC分类号： G11B5/012 , G11B5/55 , G11B5/596 , G11B7/0037 , G11B19/20 , G11B19/247 , G11B20/12 , G11B21/00 , G11B21/02 , G11B21/04 , G11B27/00 , G11B27/10 , H04N7/173
CPC分类号： G11B5/5965 , G11B19/20 , G11B19/2009 , G11B19/247 , G11B20/12 , G11B20/1258 , G11B21/00 , G11B21/02 , G11B21/04 , G11B27/002 , G11B27/105 , G11B5/012 , G11B5/5521 , G11B5/5526 , H04N7/17336 , G11B2020/10916 , G11B2220/20 , G11B2220/41 , G11B2220/415 , G11B7/0037
摘要： A disk drive stores multimedia data in long spiral data tracks. The tracks on opposite surfaces of the disk spiral in opposite directions, so that a track on one surface can be read as the actuator sweeps in, and a track on the opposite surface can be read as the actuator sweeps out. Because the actuator only follows spiral tracks without performing long seek operations, the actuator motor can be reduced in size and stresses on actuator bearings and other parts are reduced. Additionally, due to reduced disturbances associated with seeks, it is possible to follow tracks more closely and therefore reduce the width of individual tracks. Further cost reductions are accomplished by spinning the disks at a slower speed and reducing the size of the spin motor accordingly. Finally, data density can be increased simply because multimedia data does not require the same low error rate as conventional data. Preferably, a group of disk drives optimized for multimedia data is used to form a video-on-demand system. Compressed, interleaved portions of a video presentation, such as a motion picture, are stored in blocks on the spiral tracks. The drives read the blocks on one spiral track at a time from beginning to end, placing the data from these blocks in a set of buffers corresponding to different short time intervals. Video signals are output from the buffers. Any short time interval of the presentation can be accessed on demand by switching to the appropriate buffer.
摘要翻译：磁盘驱动器将多媒体数据存储在长螺旋数据轨道中。盘的相对表面上的轨迹以相反的方向螺旋，使得当致动器扫过时可以读取一个表面上的轨道，并且当致动器扫过时可以读取相对表面上的轨道。由于执行器只能沿着螺旋轨道进行，而不需要执行长时间的寻道操作，所以致动器马达的尺寸和致动器轴承的应力减小，其他部件也减少。另外，由于与寻找相关联的干扰减少，可以更紧密地跟踪轨道，并因此减小各个轨道的宽度。通过以较慢的速度旋转盘并相应地减小旋转马达的尺寸来实现进一步的成本降低。最后，数据密度可以简单地增加，因为多媒体数据不需要与传统数据相同的低错误率。优选地，使用针对多媒体数据优化的一组磁盘驱动器来形成视频点播系统。诸如运动图像的视频呈现的压缩的交错部分被存储在螺旋轨道上的块中。驱动器从开始到结束一次读取一个螺旋轨道上的块，将来自这些块的数据放置在对应于不同短时间间隔的一组缓冲器中。视频信号从缓冲器输出。通过切换到适当的缓冲区，可以根据需要访问演示的任何短时间间隔。

3. 发明授权

US5392290A System and method for preventing direct access data storage system data loss from mechanical shock during write operation 失效
标题翻译：用于防止在写入操作期间直接访问数据存储系统数据丢失的机械冲击的系统和方法
公开(公告)号：US5392290A
公开(公告)日：1995-02-21
申请号：US922453
申请日：1992-07-30
申请人： Dana H. Brown , Kevin J. Erickson , Daniel L. Good , Richard Greenberg , Peter M. Herman , Hal H. Ottesen
发明人： Dana H. Brown , Kevin J. Erickson , Daniel L. Good , Richard Greenberg , Peter M. Herman , Hal H. Ottesen
IPC分类号： G06F3/06 , G06F12/16 , G11B19/04 , G11B19/12 , G11B20/10 , G11B20/18 , G06F11/08 , G06F11/14
CPC分类号： G11B20/1803 , G11B19/04 , G11B19/12 , G11B20/1833 , G11B2020/1282 , G11B2020/1284
摘要： A secondary data storage system for a host computer system includes a disk drive system having a device controller, at least a first magnetic disk and a read/write magnetic transducer positionable with respect to a recording surface of each magnetic disk. A write operation exposes data on adjacent tracks to potential damage if an off track condition occurs to the transducer during a write. A method for controlling write operations through the device controller provides backup of data in tracks adjacent to a target track for the write operation prior to the write operation occurring. The method detects occurrence of events resulting in an off track condition of the magnetic transducer relative to a target track. Occurrence of such an event triggers a determination of damage to the contents of tracks adjacent to the target track and restoration of those tracks. Write operations to the target track are blocked until shock events discontinue.
摘要翻译：用于主计算机系统的辅助数据存储系统包括具有设备控制器，至少第一磁盘和可相对于每个磁盘的记录表面定位的读/写磁换能器的磁盘驱动器系统。如果在写入期间传感器发生偏离轨迹条件，则写入操作将相邻轨道上的数据暴露于潜在的损坏。用于通过设备控制器控制写入操作的方法在写入操作发生之前提供与用于写入操作的目标轨道相邻的轨道中的数据的备份。该方法检测导致磁换能器相对于目标轨道偏离轨迹的事件的发生。这种事件的发生触发确定与目标轨道相邻的轨道的内容的损坏以及这些轨道的恢复。对目标轨道的写入操作将被阻止，直到冲击事件停止为止。

4. 发明授权

US5377131A Digital amplitude estimator 失效
标题翻译：数字振幅估计器
公开(公告)号：US5377131A
公开(公告)日：1994-12-27
申请号：US999047
申请日：1992-12-31
申请人： Hal H. Ottesen , Gordon J. Smith
发明人： Hal H. Ottesen , Gordon J. Smith
IPC分类号： G01R19/25 , G06F17/00 , G06F17/18 , G06F15/31
CPC分类号： G06F17/18 , G01R19/25 , G01R19/2506
摘要： Amplitude information is derived from a periodic waveform by digitally sampling the periodic waveform, filtering a digital harmonic signal out of the digital sample sequence of the periodic waveform, and computing the root mean square of the digital Mth harmonic signal over a predetermined number of successive samplings of the periodic waveform. The digital sampling is done at a rate such that there will be an integer number of samples "L" over the period of the first harmonic component of the digital sample sequence of the waveform signal. The root mean square value computation is simplified by selecting the sampling window width N and the harmonic M so that there is a predetermined relationship to a critical sampling number L given by the expression, L=(4MN)/(2j+1) where j=0, 1, 2, . . . . As long as this relationship is satisfied, the RMS value can be computed by summing the absolute value of selected digital amplitude values of the selected harmonic component of the digitized signal. Further, the RMS values may be averaged by nesting a number of successive indexed RMS value computations.
摘要翻译：通过对周期性波形进行数字采样，从周期波形的数字采样序列中滤出数字谐波信号，并在预定数量的连续取样中计算数字M次谐波信号的均方根，从周期波形中得到振幅信息的周期性波形。数字采样以使得在波形信号的数字采样序列的一次谐波分量的周期内将存在整数个采样“L”的速率进行。通过选择采样窗口宽度N和谐波M来简化均方根值计算，使得与表达式L =（4MN）/（2j + 1）给出的关键采样数L有预定关系，其中j = 0，1，2，... 。。。只要满足该关系，可以通过将数字化信号的所选择的谐波分量的所选数字振幅值的绝对值求和来计算RMS值。此外，可以通过嵌套多个连续索引的RMS值计算来平均RMS值。

5. 发明授权

US5630104A Apparatus and method for providing multimedia data 失效
标题翻译：用于提供多媒体数据的装置和方法
公开(公告)号：US5630104A
公开(公告)日：1997-05-13
申请号：US444116
申请日：1995-05-18
申请人： Hal H. Ottesen , Gordon J. Smith , George W. Van Leeuwen
发明人： Hal H. Ottesen , Gordon J. Smith , George W. Van Leeuwen
IPC分类号： G11B5/012 , G11B5/55 , G11B5/596 , G11B7/0037 , G11B19/20 , G11B19/247 , G11B20/12 , G11B21/00 , G11B21/02 , G11B21/04 , G11B27/00 , G11B27/10 , H04N7/173 , G06F17/00 , G06F9/455
CPC分类号： G11B5/5965 , G11B19/20 , G11B19/2009 , G11B19/247 , G11B20/12 , G11B20/1258 , G11B21/00 , G11B21/02 , G11B21/04 , G11B27/002 , G11B27/105 , G11B5/012 , G11B5/5521 , G11B5/5526 , H04N7/17336 , G11B2020/10916 , G11B2220/20 , G11B2220/41 , G11B2220/415 , G11B7/0037
摘要： A disk drive stores multimedia data in long spiral data tracks. The tracks on opposite surfaces of the disk spiral in opposite directions, so that a track on one surface can be read as the actuator sweeps in, and a track on the opposite surface can be read as the actuator sweeps out. Because the actuator only follows spiral tracks without performing long seek operations, the actuator motor can be reduced in size and stresses on actuator bearings and other parts are reduced. Additionally, due to reduced disturbances associated with seeks, it is possible to follow tracks more closely and therefore reduce the width of individual tracks. Further cost reductions are accomplished by spinning the disks at a slower speed and reducing the size of the spin motor accordingly. Finally, data density can be increased simply because multimedia data does not require the same low error rate as conventional data. Preferably, a group of disk drives optimized for multimedia data is used to form a video-on-demand system. Compressed, interleaved portions of a video presentation, such as a motion picture, are stored in blocks on the spiral tracks. The drives read the blocks on one spiral track at a time from beginning to end, placing the data from these blocks in a set of buffers corresponding to different short time intervals. Video signals are output from the buffers. Any short time interval of the presentation can be accessed on demand by switching to the appropriate buffer.
摘要翻译：磁盘驱动器将多媒体数据存储在长螺旋数据轨道中。盘的相对表面上的轨迹以相反的方向螺旋，使得当致动器扫过时可以读取一个表面上的轨道，并且当致动器扫过时可以读取相对表面上的轨道。由于执行器只能沿着螺旋轨道进行，而不需要执行长时间的寻道操作，所以致动器马达的尺寸和致动器轴承的应力减小，其他部件也减少。另外，由于与寻找相关联的干扰减少，可以更紧密地跟踪轨道，并因此减小各个轨道的宽度。通过以较慢的速度旋转盘并相应地减小旋转马达的尺寸来实现进一步的成本降低。最后，数据密度可以简单地增加，因为多媒体数据不需要与传统数据相同的低错误率。优选地，使用针对多媒体数据优化的一组磁盘驱动器来形成视频点播系统。诸如运动图像的视频呈现的压缩的交错部分被存储在螺旋轨道上的块中。驱动器从开始到结束一次读取一个螺旋轨道上的块，将来自这些块的数据放置在对应于不同短时间间隔的一组缓冲器中。视频信号从缓冲器输出。通过切换到适当的缓冲区，可以根据需要访问演示的任何短时间间隔。

6. 发明授权

US5594924A Multiple user multimedia data server with switch to load time interval interleaved data to plurality of time interval assigned buffers 失效
标题翻译：多用户多媒体数据服务器，具有切换以将时间间隔交织的数据加载到多个时间间隔分配的缓冲器
公开(公告)号：US5594924A
公开(公告)日：1997-01-14
申请号：US443838
申请日：1995-05-18
申请人： Hal H. Ottesen , Gordon J. Smith , George W. Van Leeuwen
发明人： Hal H. Ottesen , Gordon J. Smith , George W. Van Leeuwen
IPC分类号： G11B5/012 , G11B5/55 , G11B5/596 , G11B7/0037 , G11B19/20 , G11B19/247 , G11B20/12 , G11B21/00 , G11B21/02 , G11B21/04 , G11B27/00 , G11B27/10 , H04N7/173 , G06F9/312
CPC分类号： G11B5/5965 , G11B19/20 , G11B19/2009 , G11B19/247 , G11B20/12 , G11B20/1258 , G11B21/00 , G11B21/02 , G11B21/04 , G11B27/002 , G11B27/105 , G11B5/012 , G11B5/5521 , G11B5/5526 , H04N7/17336 , G11B2020/10916 , G11B2220/20 , G11B2220/41 , G11B2220/415 , G11B7/0037
摘要： A disk drive stores multimedia data in long spiral data tracks. The tracks on opposite surfaces of the disk spiral in opposite directions, so that a track on one surface can be read as the actuator sweeps in, and a track on the opposite surface can be read as the actuator sweeps out. Because the actuator only follows spiral tracks without performing long seek operations, the actuator motor can be reduced in size and stresses on actuator bearings and other parts are reduced. Additionally, due to reduced disturbances associated with seeks, it is possible to follow tracks more closely and therefore reduce the width of individual tracks. Further cost reductions are accomplished by spinning the disks at a slower speed and reducing the size of the spin motor accordingly. Finally, data density can be increased simply because multimedia data does not require the same low error rate as conventional data. Preferably, a group of disk drives optimized for multimedia data is used to form a video-on-demand system. Compressed, interleaved portions of a video presentation, such as a motion picture, are stored in blocks on the spiral tracks. The drives read the blocks on one spiral track at a time from beginning to end, placing the data from these blocks in a set of buffers corresponding to different short time intervals. Video signals are output from the buffers. Any short time interval of the presentation can be accessed on demand by switching to the appropriate buffer.
摘要翻译：磁盘驱动器将多媒体数据存储在长螺旋数据轨道中。盘的相对表面上的轨迹以相反的方向螺旋，使得当致动器扫过时可以读取一个表面上的轨道，并且当致动器扫过时可以读取相对表面上的轨道。由于执行器只能沿着螺旋轨道进行，而不需要执行长时间的寻道操作，所以致动器马达的尺寸和致动器轴承的应力减小，其他部件也减少。另外，由于与寻找相关联的干扰减少，可以更紧密地跟踪轨道，并因此减小各个轨道的宽度。通过以较慢的速度旋转盘并相应地减小旋转马达的尺寸来实现进一步的成本降低。最后，数据密度可以简单地增加，因为多媒体数据不需要与传统数据相同的低错误率。优选地，使用针对多媒体数据优化的一组磁盘驱动器来形成视频点播系统。诸如运动图像的视频呈现的压缩的交错部分被存储在螺旋轨道上的块中。驱动器从开始到结束一次读取一个螺旋轨道上的块，将来自这些块的数据放置在对应于不同短时间间隔的一组缓冲器中。视频信号从缓冲器输出。通过切换到适当的缓冲区，可以根据需要访问演示的任何短时间间隔。

7. 发明授权

US5633767A Adaptive and in-situ load/unload damage estimation and compensation 失效
标题翻译：自适应和原位装载/卸载损伤估计和补偿
公开(公告)号：US5633767A
公开(公告)日：1997-05-27
申请号：US469253
申请日：1995-06-06
申请人： Zine-Eddine Boutaghou , Hal H. Ottesen , Gordon J. Smith
发明人： Zine-Eddine Boutaghou , Hal H. Ottesen , Gordon J. Smith
IPC分类号： G11B19/04 , G06F11/00 , G11B5/09 , G11B5/54 , G11B20/18 , G11B21/02 , G11B21/12 , G11B21/22
CPC分类号： G11B5/54 , G11B19/04 , G11B20/1816 , G11B20/1879 , G11B21/12 , G11B21/22
摘要： The present invention overcomes the problems that accompany the use of ramps to load and unload transducer carrying sliders in rigid magnetic disk data storage devices. The tracks in the region where the slider loads and unloads are read and the errors recorded following each slider loading operation. One technique is to track the error increase and identify imminent device failure when the rate of error increase during a given number of the most recent slider load cycles exceeds a threshold value. In another mode, a dedicated sequence of tracks is recorded at an increased linear density to assure that read errors occur to enable a more effective comparative evaluation. This makes possible a two stage evaluation, a first threshold number of errors indicative of degrading performance which initiates lower actuator velocity to inhibit further degradation and a second threshold error quantity that indicates imminent catastrophic failure and triggers a warning to the system user. To make the analysis more meaningful, certain errors may be ignored, such as simpler errors or the full number of errors in a cluster that may be the result of a single event.
摘要翻译：本发明克服了使用斜坡在刚性磁盘数据存储装置中装载和卸载传感器携带滑块的问题。读取滑块加载和卸载的区域中的轨迹，并在每个滑块加载操作之后记录错误。一种技术是在给定数量的最近的滑块加载循环中的错误增加率超过阈值时跟踪错误增加并识别即将发生的设备故障。在另一种模式中，以增加的线性密度记录专用的磁道序列，以确保发生读取错误以实现更有效的比较评估。这使得可以进行两阶段评估，指示降级性能的第一阈值数量的错误，其启动较低的致动器速度以抑制进一步劣化，以及指示即将发生的灾难性故障并触发对系统用户的警告的第二阈值误差量。为了使分析更有意义，可能会忽略某些错误，例如可能是单个事件的结果的更简单的错误或集群中的完整数量的错误。

8. 发明授权

US5410439A Disk file with clearance and glide measurement and early head crash warning 失效
标题翻译：磁盘文件具有清除和滑动测量和早期的头部碰撞警告
公开(公告)号：US5410439A
公开(公告)日：1995-04-25
申请号：US200838
申请日：1994-02-22
申请人： Gary T. Egbert , Hal H. Ottesen , Gordon J. Smith
发明人： Gary T. Egbert , Hal H. Ottesen , Gordon J. Smith
IPC分类号： G06F11/22 , G11B19/04 , G11B19/20 , G11B20/18 , G11B21/21 , G11B33/10 , G11B15/46
CPC分类号： G11B19/20 , G11B19/04 , G11B20/1816 , G11B33/10 , G06F11/2205 , G06F11/2273
摘要： The invention produces and maintains clearance and glide test results for a disk file, stores these results, and monitors head clearance and disk asperities over the useful life of the file using native disk file electronics. The disk file includes a predictive failure analysis component which utilizes clearance and glide test results to predict impending failure of a disk in the disk file.
摘要翻译：本发明产生并保持磁盘文件的清除和滑动测试结果，存储这些结果，并使用本机磁盘文件电子器件在文件的使用寿命内监视磁头间隙和磁盘粗糙度。磁盘文件包括预测故障分析组件，其利用间隙和滑动测试结果来预测磁盘文件中磁盘的即将发生的故障。

9. 发明授权

US5327298A Noise minimization for magnetic data storage drives using oversampling techniques 失效
标题翻译：使用过采样技术的磁数据存储驱动器的噪声最小化
公开(公告)号：US5327298A
公开(公告)日：1994-07-05
申请号：US943270
申请日：1992-09-10
申请人： Hal H. Ottesen , Gordon J. Smith
发明人： Hal H. Ottesen , Gordon J. Smith
IPC分类号： G11B5/09 , G11B20/10
CPC分类号： G11B20/10527 , G11B20/10009
摘要： A method and apparatus for minimizing the effects of non-stationary high-energy noise sources in magnetic data storage channel through the use of an oversampling and post-sampling filtering anti-aliasing procedure. The initial analog data is sampled at a rate sufficiently above the Nyquist rate to avoid aliasing. The high-frequency sampling stream is then digitally filtered to produce a lower-rate digital data stream having a reduced Nyquist rate introduced by the post-sampling digital filter. Because the anti-aliasing post-sampling filter is digital, no phase distortion is introduced in the readback data signal. Because the post-sampling digital filter lowers the Nyquist rate, late digital processing and decoding is accomplished without aliasing at a data rate below the initial Nyquist rate. High-energy noise pulses are preserved without smearing and can be simply removed by the usual error-correction method.
摘要翻译：一种用于通过使用过采样和后采样滤波抗锯齿程序来最小化磁数据存储信道中的非固定高能噪声源的影响的方法和装置。初始模拟数据以足以高于奈奎斯特速率的速率进行采样，以避免混叠。然后对高频采样流进行数字滤波以产生具有由采样后数字滤波器引入的降低的奈奎斯特速率的较低速率数字数据流。因为抗混叠后采样滤波器是数字的，所以在回读数据信号中不引入相位失真。由于后采样数字滤波器降低了奈奎斯特速率，所以在数据速率低于初始奈奎斯特速率的情况下，可以实现后期数字处理和解码，而不会出现混叠。高能量噪声脉冲被保留而不会拖尾，并且可以通过通常的纠错方法简单地去除。

10. 发明授权

US5301080A Bias servo loop for magneto-resistive read/write head 失效
标题翻译：用于磁阻读/写头的偏置伺服环
公开(公告)号：US5301080A
公开(公告)日：1994-04-05
申请号：US999628
申请日：1992-12-31
申请人： Hal H. Ottesen , Gordon J. Smith
发明人： Hal H. Ottesen , Gordon J. Smith
IPC分类号： G11B5/00 , G11B5/02 , G11B5/035 , G11B5/09 , G11B5/39 , G11B27/36 , G11B5/127 , G11B5/03
CPC分类号： G11B27/36 , G11B5/02 , G11B5/035 , G11B2005/0018
摘要： A bias current servo loop for a magneto-resistive recording head detects distortion in the read signal from the MR head, and adjusts the operating point for the head to minimize the distortion. The distortion is detected by monitoring the second harmonic of a digitized sample of the read signal. A running average of the digitized amplitude of the second harmonic is generated by a digital bandpass filter. The root mean square of the running average of the digitized amplitude of the second harmonic is estimated. The estimated RMS value is compared against a reference value indicative of minimum distortion and the difference between the estimated RMS value and the reference value is used to adjust the bias current.
摘要翻译：用于磁阻记录头的偏置电流伺服环路检测来自MR磁头的读取信号中的失真，并且调节磁头的操作点以最小化失真。通过监视读取信号的数字化采样的二次谐波来检测失真。数字带通滤波器产生二次谐波的数字化幅度的平均运行。估计二次谐波的数字化幅度的运行平均值的均方根。将估计的RMS值与表示最小失真的参考值进行比较，并且使用估计的RMS值和参考值之间的差来调整偏置电流。

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