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1. 发明授权

US5574602A Processing servo signals concurrently read from plural spaced-apart servo areas for a magnetic tape having serpentine data track scanning 失效
标题翻译：对于具有蛇形数据轨道扫描的磁带，从多个间隔开的伺服区域同时读取伺服信号
公开(公告)号：US5574602A
公开(公告)日：1996-11-12
申请号：US75624
申请日：1993-06-14
申请人： Robert C. Baca , Man F. Cheung , Alex Chliwnyjae , Wayne T. Comeaux , James F. Crossland
发明人： Robert C. Baca , Man F. Cheung , Alex Chliwnyjae , Wayne T. Comeaux , James F. Crossland
IPC分类号： G11B5/55 , G11B5/584 , G11B15/02 , G11B15/04
CPC分类号： G11B5/584 , G11B15/026 , G11B15/04 , G11B5/5508
摘要： In a magnetic tape drive, a magnetic head simultaneously senses plural track lateral position indicators to generate a like plurality of independently generated sensed position error signals. The sensed position error signals are combined to provide an output position error signal that drives a positioning system to position the magnetic laterally of the length of the magnetic tape. The output position error signal represents an average of the position errors indicated by the sensed position error signals. The quality of the sensed position error signal is monitored, enabling eliminating poor quality signals from the output position error signal for maintaining a quality servo control. If less than a predetermined number of sensed position error signals have acceptable quality, then recording data is prohibited. Independently of sensing servo indicia on a record member to generate the sensed position error signals, a lateral position of the multi-track head is sensed. Upon loading the record member to a load point, the plural track position indicators are simultaneously sensed for centering the head to a predetermined track position. Then, an independent head position sensor is calibrated to the load point track position indicators for use as a verification of validity of the output position error signal. During recording and reading operations, the independent head position is determined on a periodic basis. If an unacceptable change in head position during any measurement period occurs or if the independent measurement indicates an unacceptable lateral deviation from the reference position, all recording is prohibited.
摘要翻译：在磁带驱动器中，磁头同时感测多个轨道横向位置指示器以产生相似多个独立产生的感测位置误差信号。感测到的位置误差信号被组合以提供输出位置误差信号，其驱动定位系统以将磁体的横向方向定位在磁带的长度上。输出位置误差信号表示由感测到的位置误差信号指示的位置误差的平均值。监测感测到的位置误差信号的质量，从而能够消除来自输出位置误差信号的质量差的信号，以保持质量伺服控制。如果小于预定数量的感测位置误差信号具有可接受的质量，则禁止记录数据。独立于在记录构件上感测伺服标记以产生感测到的位置误差信号，感测多轨头的横向位置。在将记录构件加载到加载点时，同时感测多个轨道位置指示器以将磁头定中心到预定轨道位置。然后，将独立的头部位置传感器校准到负载点轨道位置指示器，以用作验证输出位置误差信号的有效性。在记录和读取操作期间，定期地确定独立的头位置。如果在任何测量期间发生头部位置的不可接受的变化，或者如果独立测量表明与参考位置的不可接受的横向偏差，则禁止所有记录。

2. 发明授权

US5629813A Initialization and calibration of magnetic tape having multiple servo areas 失效
标题翻译：具有多个伺服区域的磁带的初始化和校准
公开(公告)号：US5629813A
公开(公告)日：1997-05-13
申请号：US406277
申请日：1995-03-16
申请人： Robert C. Baca , Alex Chliwnyj , Wayne T. Comeaux , James F. Crossland , Ronald K. Rhodes
发明人： Robert C. Baca , Alex Chliwnyj , Wayne T. Comeaux , James F. Crossland , Ronald K. Rhodes
IPC分类号： G11B5/56 , G11B5/55 , G11B5/584 , G11B15/02
CPC分类号： G11B5/584 , G11B5/5508
摘要： The present invention provides an apparatus and method for initializing a magnetic tape when it is mounted in a tape drive. In one embodiment, each time a tape is mounted, control parameters pertaining to the servo system are set to predetermined values and servo read elements in the tape head are activated. The tape is moved and a number of position error signal (PES) samples are read and averaged for each of the active servo elements. The value of one or more of the parameters is modified and new PES readings and averages are obtained. This process is repeated for a predetermined combination of parameter values whereupon read and write offsets are calculated and stored for each servo element. During an actual read (or write) operation, the tape head is positioned relative to the data tracks on which the desired data is located and servo control enabled. An actual PES generated by each active servo element is adjusted by the read (or write) offset calculated for that servo element, thereby substantially canceling the effects of element-to-element, module-to-module and azimuthal deviations. The resulting adjusted PES is used by the servo controller to optimize track following.
摘要翻译：本发明提供一种当磁带安装在磁带驱动器中时初始化磁带的装置和方法。在一个实施例中，每次安装磁带时，与伺服系统相关的控制参数被设置为预定值，磁带头中的伺服读取元件被激活。磁带被移动，并且对于每个有效的伺服元件读取和平均多个位置误差信号（PES）样本。修改一个或多个参数的值，并获得新的PES读数和平均值。对于参数值的预定组合重复该过程，由此为每个伺服元件计算和存储读取和写入偏移量。在实际的读取（或写入）操作期间，磁带头相对于所需数据所在的数据磁道定位，伺服控制使能。由每个有效伺服单元产生的实际PES通过为该伺服单元计算出的读（或写）偏移量进行调整，从而基本上消除了元件间元件，模块间模块和方位偏差的影响。所得到的经调整的PES由伺服控制器用于优化跟踪跟踪。

3. 发明授权

US5432652A Servo and data format for magnetic tape having plural spaced-apart servo areas interleaved with data track areas having serpentine track scanning using any one of a plurality of number of concurrently accessed tracks 失效
标题翻译：具有多个间隔开的伺服区域的磁带的伺服和数据格式，该伺服区域与具有多个并行访问的轨道中的任何一个的具有蛇形磁道扫描的数据磁道区域交错
公开(公告)号：US5432652A
公开(公告)日：1995-07-11
申请号：US75625
申请日：1993-06-14
申请人： Wayne T. Comeaux , David C. Graves , Douglas W. Johnson
发明人： Wayne T. Comeaux , David C. Graves , Douglas W. Johnson
IPC分类号： G11B5/09 , G11B5/55 , G11B5/584 , G11B20/12
CPC分类号： G11B5/5508 , G11B5/584
摘要： A magnetic tape has three evenly spaced-apart longitudinally-extending servo track areas. Four equal-sized longitudinally-extending data track areas are disposed between said servo track areas and between longitudinal edges of the tape and one of said longitudinally-extending data track areas. For track following, all servo track areas are simultaneously sensed for producing one head positioning signal. Data tracks are arranged into four groups of tracks, one-half of the data tracks in each group are concurrently accessed. The data tracks on the tape are arranged in clusters. Each cluster has one track from each of the groups of tracks. Two laterally-adjacent track clusters constitute four data track wraps for serpentine scanning of data tracks. The concurrent track accessing respectively occurs in first and second halves of a data track wrap (there is a number of wraps equal to one half the number of track clusters). Each servo area indicates two lateral positions of the tape to the head. The lateral spacing between the lateral positions is equal to about a data track width. This arrangement makes the servo areas field writable. The magnetic head has a number of data write and read gaps equal to the number of clusters. A set of four servo gaps are interposed between four groups of write and read gaps and positioned to simultaneously sense all three servo track areas.
摘要翻译：磁带具有三个均匀间隔开的纵向延伸的伺服磁道区域。在所述伺服磁道区域之间以及磁带的纵向边缘和所述纵向延伸的数据磁道区域中的一个之间设置四个等大小的纵向延伸的数据磁道区域。对于跟踪跟踪，所有伺服磁道区域同时被检测以产生一个磁头定位信号。数据磁道被布置成四组磁道，每组中的一半数据磁道被同时访问。磁带上的数据轨道排成簇。每个群集具有来自每组轨道的一个轨道。两个横向相邻的轨道簇构成了用于数据轨迹的蛇形扫描的四个数据轨迹包。并发跟踪访问分别发生在数据轨道包裹的第一和第二半部（存在等于轨道簇数量的一半的卷数）。每个伺服区域表示磁带到头部的两个横向位置。横向位置之间的横向间隔等于数据轨迹宽度。这种布置使伺服区域可写。磁头具有等于簇数的多个数据写入和读取间隙。在四组写入和读取间隙之间插入一组四个伺服间隙，并且定位成同时感测所有三个伺服轨迹区域。

4. 发明授权

US5284308A Tape path having implicit squeeze bearing 失效
标题翻译：磁带路径具有隐式挤压轴承
公开(公告)号：US5284308A
公开(公告)日：1994-02-08
申请号：US908608
申请日：1992-06-29
申请人： Wayne T. Comeaux , Don G. East , Steven L. Felde , Douglas W. Johnson
发明人： Wayne T. Comeaux , Don G. East , Steven L. Felde , Douglas W. Johnson
IPC分类号： G11B15/43 , G11B15/60 , G11B15/67 , G11B23/04 , G11B23/107
CPC分类号： G11B23/047 , G11B15/43 , G11B15/605 , G11B23/107
摘要： A tape path having an implicit squeeze bearing. In such a tape path, one end of the tape is wound upon a first reel, the tape extends around one or more guides, briefly comes into close proximity with itself at the outer wrap of the tape wound upon the first reel, and is wound upon a second reel. By coming within close proximity with itself, the tape forms an implicit squeeze bearing which damps tape tension variation, inhibits the transmission of vibrations from one reel to the other, and eliminates the entrapment of entrained air without any additional rollers or other components. The tape path is suitable for use in a peripheral storage device, such as a magnetic tape drive, and is compatible with a variety of tape cartridge configurations.
摘要翻译：具有隐式挤压轴承的磁带路径。在这种磁带路径中，磁带的一端被卷绕在第一卷轴上，磁带围绕一个或多个导向件延伸，在卷绕在第一卷轴上的磁带的外部卷绕件上短暂地与其自身紧密接合，并且被卷绕在第二个卷轴上。通过与其紧密接近，带形成隐性挤压轴承，其阻止带张力变化，抑制振动从一个卷轴传递到另一个卷轴，并且消除夹带的空气而没有任何附加的辊或其它部件。磁带路径适用于诸如磁带驱动器的外围存储设备，并且与各种带盒配置兼容。

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