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1. 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。

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

US5343340A Digital servo signal demodulation method and apparatus utilizing a partial-response maximum-likelihood (PRML) channel in a disk file 失效
标题翻译：利用磁盘文件中的部分响应最大似然（PRML）信道的数字伺服信号解调方法和装置
公开(公告)号：US5343340A
公开(公告)日：1994-08-30
申请号：US999309
申请日：1992-12-31
申请人： Zine-Eddine Boutaghou , Dana H. Brown , Kevin J. Erickson , Richard Greenberg
发明人： Zine-Eddine Boutaghou , Dana H. Brown , Kevin J. Erickson , Richard Greenberg
IPC分类号： G11B21/10 , G11B5/596 , G11B20/10 , G11B21/08
CPC分类号： G11B5/59622 , G11B20/10009 , G11B21/083
摘要： Apparatus and method are provided for servo signal demodulation using a servo processor and a partial-response maximum-likelihood (PRML) data channel in a disk file. A servo burst timing window is identified. Then a plurality of digital samples are detected with the PRML data channel responsive to identifying the servo burst timing window. Sequential sets of the detected digital samples are accumulated by the PRML data channel and transmitted to the servo processor. The digital samples are processed by the servo processor for providing servo phase information that is used to provide servo position information.
摘要翻译：提供了使用伺服处理器和磁盘文件中的部分响应最大似然（PRML）数据信道进行伺服信号解调的装置和方法。识别伺服突发定时窗口。然后响应于识别伺服突发定时窗口，用PRML数据信道检测多个数字样本。检测到的数字样本的顺序集由PRML数据信道累加并传送到伺服处理器。数字样本由伺服处理器处理，用于提供用于提供伺服位置信息的伺服相位信息。

4. 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。

5. 发明授权

US5570247A Self servo writing file 失效
标题翻译：自动伺服写入文件
公开(公告)号：US5570247A
公开(公告)日：1996-10-29
申请号：US456973
申请日：1995-06-01
申请人： Dana H. Brown , Thomas C. Christensen , Earl A. Cunningham , Wayne A. Rogelstad
发明人： Dana H. Brown , Thomas C. Christensen , Earl A. Cunningham , Wayne A. Rogelstad
IPC分类号： G11B5/596 , G11B27/32 , G11B27/19
CPC分类号： G11B5/59633 , G11B27/322
摘要： A self servo writing file and method for writing servo patterns in a direct access storage device are provided. First servo information is written on a data storage media at a first crash stop. The transducer heads are moved offset from the written servo information while reading the last written servo information until the detected servo signal equals a predetermined value. Then servo information is written on the data storage media responsive to the detected servo signal equal to the predetermined value. The moving and writing steps are sequentially repeated until a second crash stop is reached. A quad-burst servo amplitude pattern or phase pattern can be used for the servo information. The servo writing method is adapted easily for many different servo options. When the file uses a hybrid servo or sector servo, the other surfaces can be written by duplicating the servo bursts with a high bandwidth servo system of the file. Alternatively, the servo writing steps can be repeated for each of the other surfaces for providing head dependent pitch. Variable track pitch can be provided by selectively varying the predetermined value compared with the detected servo signal.
摘要翻译：提供一种用于在直接存取存储装置中写入伺服模式的自伺服写入文件和方法。第一伺服信息在第一次碰撞停止时被写入数据存储介质。当读取最后写入的伺服信息直到检测到的伺服信号等于预定值时，传感器头与写入的伺服信息偏移。然后根据检测到的等于预定值的伺服信号将伺服信息写入数据存储介质上。顺序重复移动和写入步骤，直到达到第二次碰撞停止。伺服信息可以使用四脉冲串伺服幅度模式或相位模式。伺服写入方式适用于许多不同的伺服选项。当文件使用混合伺服或扇区伺服时，其他表面可以通过用文件的高带宽伺服系统复制伺服脉冲串来写入。或者，可以针对每个其他表面重复伺服写入步骤，以提供与头部相关的音调。可以通过与检测到的伺服信号相比选择性地改变预定值来提供可变轨道间距。

6. 发明授权

US5794056A System for automatic buffering of commands for DASD units 失效
标题翻译：用于自动缓冲DASD单元命令的系统
公开(公告)号：US5794056A
公开(公告)日：1998-08-11
申请号：US707095
申请日：1996-09-03
申请人： Dana H. Brown
发明人： Dana H. Brown
IPC分类号： G06F3/06 , G11B5/55 , G11B5/596 , G11B19/02 , G11B23/50 , G06F9/00 , G06F13/00
CPC分类号： G06F3/0607 , G06F3/0659 , G06F3/0674 , G11B19/02 , G06F3/0653 , G11B23/507 , G11B5/5534 , G11B5/59644
摘要： A direct access storage device may handle various disk drive management functions without contemporaneous host computer involvement by buffering commands for the management functions in controller memory. The commands may be read into controller memory from the disk drive on power up or programmed by the host computer. Initially the commands are treated as processes in a blocked state. Operating statistics kept by a supervisor program for the controller are monitored by an event handler, which moves processes to a ready to run state upon occurrence of specified conditions. A dispatcher then moves commands into the direct access storage controller for execution and subsequent return to blocked status.
摘要翻译：直接访问存储设备可以通过缓冲控制器存储器中的管理功能的命令来处理各种磁盘驱动器管理功能而无需同时主机计算机的参与。这些命令可以通过上电或从主机计算机从磁盘驱动器读入控制器存储器。最初，命令被视为处于阻塞状态的进程。由控制器的主管程序保存的操作统计信息由事件处理程序监视，事件处理程序在发生指定条件时将进程移动到准备运行状态。调度员然后将命令移动到直接访问存储控制器中以便执行并随后返回到阻塞状态。

7. 发明授权

US5108184A Non-invasive laser positioning system for rotary actuators 失效
标题翻译：非激活激光定位系统
公开(公告)号：US5108184A
公开(公告)日：1992-04-28
申请号：US554038
申请日：1990-07-16
申请人： Dana H. Brown , Timothy J. Chainer , Wayne J. Sohn
发明人： Dana H. Brown , Timothy J. Chainer , Wayne J. Sohn
IPC分类号： G01D5/38 , G01B11/26 , G01D5/28 , G02B26/10 , G11B5/55 , G11B21/02
CPC分类号： G01D5/28 , G11B5/5521
摘要： A laser (10) provides an output beam to an interferometer (12). A portion of the output beam is directed by a beamsplitter to a receiver (18) as a reference beam while the remaining portion of the output beam passes through the beamsplitter and impinges on a plane mirror reflective surface (14a) mounted upon or integrally formed with or upon a surface of a body of interest, such as rotary actuator or arm (14). The arm has a fixed center of rotation O and rotates through an angular range indicated by theta-max. Phi is the angle of incidence of the laser beam with the arm in its original position when theta equals zero. .vertline.OC.vertline. and .vertline.CD.vertline. are distances which locate the intersection point between the arm and the laser beam relative to the center of rotation O when theta equals zero. A corner cube (16) is located at a convergence plane and returns all reflected beams back to the plane mirror and hence to the receiver via the interferometer. The interferometer and receiver operate to provide a determination of the position of the arm relative to a reference position, the determined position being used to cause a servo track or tracks to be written upon a medium at a desired position.

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