公开(公告)号：US5381282A

公开(公告)日：1995-01-10

申请号：US779438

申请日：1991-10-18

申请人： Koichi Arai ,  Hal H. Ottesen ,  Arun Sharma ,  Muthuthamby Sri-Jayantha ,  Michael C. Stich

发明人： Koichi Arai ,  Hal H. Ottesen ,  Arun Sharma ,  Muthuthamby Sri-Jayantha ,  Michael C. Stich

IPC分类号： G11B21/08 ,  G11B5/596

CPC分类号： G11B5/596

摘要： A direct access storage device and a method of operation thereof where the output of the circuit which controls energy to the position actuator for the head may be changed at times between receipt of sequential position error signals from the medium. Instead of waiting for the next position error signal, a computation is done based on at least the current position and the desired position of the head as to when the head velocity will be equal to a desired velocity. The optimum time to switch is estimated, the energy required to achieve a predetermined velocity and a predetermined offset with respect to the desired position are computed, and operation is conducted accordingly. The amount of energy may again be changed at a time subsequent to the estimated time. The predetermined velocity and the predetermined offset may be zero or may have values other than zero in accordance with the requirements of the track following controller.

摘要翻译： 一种直接存取存储装置及其操作方法，其中可以在接收到来自介质的连续位置误差信号之间的时候改变控制头部位置致动器的能量的电路的输出。 代替等待下一个位置误差信号，至少基于头部的当前位置和期望位置来计算关于头部速度将等于期望速度的时间。 估计最佳切换时间，计算实现预定速度所需的能量和相对于期望位置的预定偏移量，并相应地进行操作。 在估计时间之后的时间，能量的量再次可以改变。 预定速度和预定偏移可以为零，或者可以根据跟踪跟踪控制器的要求具有除零之外的值。

公开(公告)号：US5270880A

公开(公告)日：1993-12-14

申请号：US866687

申请日：1992-04-10

申请人： Hal H. Ottesen ,  Arun Sharma ,  Muthuthamby Sri-Jayantha

发明人： Hal H. Ottesen ,  Arun Sharma ,  Muthuthamby Sri-Jayantha

IPC分类号： G11B5/09 ,  G11B19/02 ,  G11B19/04 ,  G11B20/10 ,  G11B20/18 ,  G11B21/10 ,  G11B15/04

CPC分类号： G11B19/02 ,  G11B19/04

摘要： A method for predicting and avoiding data errors by predicting disk drive read-write inhibit requirements in response to at least two parameters including a head position error and velocity with respect to the track centerline. A write or read inhibit signal is generated in response to selected combinations of these parameters to minimize soft read errors arising from track misregistration and to avoid hard errors arising from overwriting data recorded in an adjacent track. The read and write inhibit strategy is described as a pair of linguistic control rules suitable for implementation in a Fuzzy Logic Controller.

公开(公告)号：US5267110A

公开(公告)日：1993-11-30

申请号：US672161

申请日：1991-03-19

申请人： Hal H. Ottesen ,  Muthuthamby Sri-Jayantha

发明人： Hal H. Ottesen ,  Muthuthamby Sri-Jayantha

IPC分类号： G11B21/02 ,  G11B5/55 ,  G11B5/596

CPC分类号： G11B5/5521

摘要： A rotary actuator head driver for a direct access storage device includes a transducer head moving in a radial direction across a disk surface for reading and/or writing data on a plurality of tracks for storing data. A support arm supports the transducer head relative to the disk surface. The support arm is connected to a pivot defining an axis of rotation spaced from the transducer head. A head driver positions the transducer head over one track in a track following mode or moves the transducer head from one track to another track in a seek mode. The head driver generates oppositely directed forces to produce a net torque applied to the support arm through the pivot. The oppositely directed forces have a line of action orthogonal a dominant motion of the transducer head. As a result, any parasitic force is orthogonal to the dominant motion and does not contribute to track misregistration errors. When the oppositely directed forces have an equal magnitude for force cancellation, the effect parasitic forces are eliminated. The head driver includes a pair of miniature voice coil motors or an in-the-hub motor.

摘要翻译： 用于直接存取存储装置的旋转执行机构头驱动器包括一个换能器头沿径向方向跨越盘表面移动，用于在用于存储数据的多个轨道上读取和/或写入数据。 支撑臂相对于盘表面支撑换能器头。 支撑臂连接到限定与换能器头部间隔开的旋转轴线的枢轴。 头驱动器将传感器头定位在跟踪模式下的一个轨道上，或者以寻道模式将换能器头从一个轨道移动到另一个轨道。 头部驱动器产生相反方向的力，以产生通过枢轴施加到支撑臂的净扭矩。 相反方向的力具有与换能器头的主要运动正交的作用线。 结果，任何寄生力与主要运动正交，并且不会导致跟踪错位。 当相反方向的力具有相等的力消除大小时，消除了影响寄生力。 头驱动器包括一对微型音圈电机或内嵌式电机。

公开(公告)号：US5422761A

公开(公告)日：1995-06-06

申请号：US979110

申请日：1992-11-20

申请人： Nathaniel C. Anderson ,  Mohammed A. Hajji ,  Hal H. Ottesen ,  Michael J. Ross

发明人： Nathaniel C. Anderson ,  Mohammed A. Hajji ,  Hal H. Ottesen ,  Michael J. Ross

IPC分类号： G11B20/12 ,  G11B20/18 ,  H03M13/35 ,  G11B5/09

CPC分类号： G11B20/1803 ,  H03M13/35

摘要： A magnetic disk drive includes redundant data written at a plurality of out of phase angular locations to reduce the latency and enhance performance during a read operation. The loss of recording capacity is reduced by increasing the data density to achieve the same soft error rate standard required for single recording. Dual recording also allows different recording codes to be used at the duplicated locations to thereby have the more highly stressed code words occur at different locations in the data to further reduce the possibility of an error. The redundant recording can be used in one portion of the media and normal recording used in another media portion to enable selection of the recording technique in accordance with the type of data being stored. The size of the normal and redundant recording portions can be controlled by the format operation and the user of the disk drive can intervene to designate the size of the redundant and normal media recording portions effected during the format operation.

摘要翻译： 磁盘驱动器包括写入多个异相角位置的冗余数据，以减少在读取操作期间的延迟并增强性能。 通过增加数据密度来实现单记录所需的相同的软错误率标准，可以减少记录容量的损失。 双重记录还允许在复制位置使用不同的记录代码，从而在数据中的不同位置处产生更高压力的代码字，以进一步降低错误的可能性。 冗余记录可以用于媒体的一部分和在另一媒体部分中使用的正常记录，以使得能够根据所存储的数据类型选择记录技术。 可以通过格式化操作来控制正常和冗余的记录部分的大小，并且磁盘驱动器的用户可以介入以指定在格式化操作期间实现的冗余和通常的媒体记录部分的大小。

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。

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。

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。

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。

公开(公告)号：US5369533A

公开(公告)日：1994-11-29

申请号：US998278

申请日：1992-12-30

申请人： Hal H. Ottesen ,  Gregory G. Floryance

发明人： Hal H. Ottesen ,  Gregory G. Floryance

IPC分类号： G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B5/09

CPC分类号： G11B20/10222 ,  G11B20/10009 ,  G11B20/1403 ,  G11B20/1258

摘要： In a storage device, such as a magnetic rigid disk drive, data is stored at varying linear densities in the user data storage portions to increase the effective storage capacity of the device as a function of the differences in soft error rate tolerance associated with the various types of data being stored and the ability of non-alphanumeric data to be enhanced by reconstruction or smoothing rather than by an error correction code. A data type signal included with incoming data dictates the recording frequency and a control signal associated with the recorded data block is read when data is addressed to appropriately adjust the clock frequency for reading such addressed stored data.

摘要翻译： 在诸如磁性刚性盘驱动器的存储装置中，在用户数据存储部分中以变化的线性密度存储数据，以增加作为与各种不同的软错误率容差的差异的装置的有效存储容量 正在存储的数据类型以及通过重构或平滑而不是纠错码增强非字母数字数据的能力。 包含在输入数据中的数据类型信号指示记录频率，并且当寻址数据时读取与记录数据块相关联的控制信号，以适当地调整用于读取这样寻址的存储数据的时钟频率。

公开(公告)号：US5574604A

公开(公告)日：1996-11-12

申请号：US416938

申请日：1995-04-04

申请人： Lowell J. Berg ,  Zine-Eddine Boutaghou ,  Thomas S. Larson ,  Dallas W. Meyer ,  Jay M. Mosbrucker ,  Jerry L. Neubauer ,  Hal H. Ottesen

发明人： Lowell J. Berg ,  Zine-Eddine Boutaghou ,  Thomas S. Larson ,  Dallas W. Meyer ,  Jay M. Mosbrucker ,  Jerry L. Neubauer ,  Hal H. Ottesen

IPC分类号： G11B5/54 ,  G11B21/12 ,  G11B21/22

CPC分类号： G11B5/54

摘要： A load/unload device to remove the slider from the proximity of the magnetic recording surface of a disk in a disk drive whenever the disk is to be stopped. The load/unload device is a ramp-like wedge which extends generally radially from the center of the magnetic disk and to the magnetic recording surface of the magnetic disk. When the slider is moved toward the center of the disk by an actuator mechanism, the end of the load arm supporting the slider, referred to as a tang, will engage the inclined plane of the wedge and lift the slider from the surface of the magnetic disk as the slider is translated closer to the center of the disk. Once the slider has been removed from close proximity of the disk, the tang may engage a trough-like surface on the structure supporting the wedge and will effectively detent the position of the slider through the forces exerted on the tang by the load beam of the actuator. Thus the disk will be protected from undesirable and damaging impacts of the slider against the magnetic recording surface of the disk thereby prolonging disk utility.

摘要翻译： 每当磁盘停止时，装载/卸载装置从磁盘驱动器中磁盘的磁记录表面的附近移除滑块。 装载/卸载装置是从磁盘的中心大致径向延伸到磁盘的磁记录表面的斜坡形楔形物。 当滑块通过致动器机构朝向盘的中心移动时，支撑滑块的负载臂的端部（被称为柄脚）将接合楔形物的倾斜平面并且从磁体的表面提起滑块 磁盘作为滑块更靠近磁盘的中心。 一旦滑块从盘的紧密附近被移除，则柄脚可以接合支撑楔的结构上的槽形表面，并且将有效地通过施加在柄脚上的作用力来使滑块的位置通过 执行器。 因此，该盘将被保护免受滑块抵靠磁盘的磁记录表面的不利影响，从而延长磁盘的使用效率。