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公开(公告)号：US5367513A
公开(公告)日：1994-11-22
申请号：US148695
申请日：1993-11-05
申请人： Keith A. Bates , Nhan X. Bui , Delbert A. Hansen
发明人： Keith A. Bates , Nhan X. Bui , Delbert A. Hansen
CPC分类号： G11B7/0946 , G11B7/094
摘要： A circuit for electronically compensating for optical and mechanical instabilities induced into the focus control and tracking control servo circuits of an optical disk apparatus. The circuit contains a filter and a variable gain amplifier for passing a tracking error signal compensation component at a selected frequency within the range of frequencies in which mechanical resonance is significant and at a magnitude equal to the focus error signal component at that frequency. The result is the electronic elimination of optical feedthrough at mechanically resonating frequencies. A calibration circuit establishes the compensation component magnitude for each optical disk inserted into the apparatus.
摘要翻译： 一种电子补偿光学和机械不稳定性的电路，该光学和机械不稳定性被引入到光盘装置的聚焦控制和跟踪控制伺服电路中。 该电路包含一个滤波器和一个可变增益放大器，用于将机械共振的频率范围内的选定频率的跟踪误差信号补偿分量传递到与该频率处的聚焦误差信号分量相等的幅度。 结果是在机械谐振频率下电子消除光学馈通。 校准电路为插入设备中的每个光盘建立补偿分量幅度。
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公开(公告)号：US08577043B2
公开(公告)日：2013-11-05
申请号：US12351700
申请日：2009-01-09
IPC分类号： H04L9/08
CPC分类号： G06F21/80 , G06F2221/2107
摘要： An encryption communications appliance provides data encryption management for a data storage library. The appliance is coupled to an encryption-capable storage device, a data storage library controller within the data storage library and with an encryption key manager (EKM). The encryption command communications appliance intercepts encryption key requests from the data storage device and transparently forwards the requests to the EKM. The appliance also forwards transparently communications between the library controller and the data storage device.
摘要翻译： 加密通信设备为数据存储库提供数据加密管理。 该设备耦合到数据存储库内的加密功能存储设备，数据存储库控制器以及加密密钥管理器（EKM）。 加密命令通信设备拦截来自数据存储设备的加密密钥请求，并将请求透明地转发给EKM。 设备还转发库控制器和数据存储设备之间的透明通信。
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公开(公告)号：US08520332B2
公开(公告)日：2013-08-27
申请号：US13483789
申请日：2012-05-30
申请人： Nhan X. Bui , Reed A. Hancock , Tomoko Taketomi
发明人： Nhan X. Bui , Reed A. Hancock , Tomoko Taketomi
IPC分类号： G11B15/087 , G11B5/584
CPC分类号： G11B5/56 , G11B5/00817 , G11B5/584 , G11B15/602 , G11B20/10388 , G11B2220/93
摘要： In one embodiment, a method includes sensing a servo sensor while a longitudinal tape is moved past a magnetic head, determining position error between the magnetic head and a desired position related to the at least one defined servo track; providing signals to operate a fine actuator to translate the magnetic head laterally in a manner to reduce the determined position error; transitioning from a write state to a monitor state when the determined position error is greater than a threshold error value; transitioning from the monitor state to a stop write state when the determined position error is greater than the threshold error value for a first predetermined period; and transitioning from the monitor state to the write state when the determined position error is less than the threshold error value for a second predetermined period.
摘要翻译： 在一个实施例中，一种方法包括在纵向带移动通过磁头时感测伺服传感器，确定磁头与与至少一个限定的伺服磁道有关的期望位置之间的位置误差; 提供信号以操作精细致动器以以减少所确定的位置误差的方式横向地转动磁头; 当所确定的位置误差大于阈值误差值时，从写状态转换到监视状态; 当所确定的位置误差大于所述阈值误差值时，从所述监视状态转换到停止写入状态; 以及当所确定的位置误差小于第二预定周期的阈值误差值时，从监视状态转换到写入状态。
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4.发明授权Method and apparatus to position a head module comprising servo elements and plurality of data elements 有权用于定位包括伺服元件和多个数据元素的头模块的方法和装置公开(公告)号：US08395860B2
公开(公告)日：2013-03-12
申请号：US13460614
申请日：2012-04-30
CPC分类号： G11B5/5552
摘要： A method to position a head module, where the head module comprises at least one servo element and a plurality of data elements, where the servo element and each of the plurality of data elements can detect a servo signal, wherein the method includes moving a sequential information storage medium having a servo band encoded therein across the head module and detecting the servo band using the at least one servo element or any one of the plurality of data elements.
摘要翻译： 一种定位头模块的方法，其中头模块包括至少一个伺服元件和多个数据元件，其中伺服元件和多个数据元素中的每一个可以检测伺服信号，其中该方法包括移动顺序 信息存储介质，其中跨越所述头模块编码了伺服频带，并且使用所述至少一个伺服单元或所述多个数据单元中的任何一个来检测所述伺服频带。
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5.发明授权Servo band identification and initial skew estimation in drives having flangeless rollers and systems thereof 有权具有无法兰滚子及其系统的驱动器中的伺服带识别和初始偏移估计公开(公告)号：US07961421B1
公开(公告)日：2011-06-14
申请号：US12716192
申请日：2010-03-02
IPC分类号： G11B5/58
CPC分类号： G11B5/584
摘要： According to one embodiment, a system includes a plurality of synchronous servo channels with each synchronous servo channel including a servo reader included in a magnetic head, and logic for applying a plurality of first control signals to a skew-following loop. Each first control signal includes a reference shift value, each reference shift value corresponds to one of a number of hypotheses, and each hypothesis corresponds to one servo band set. The system also includes logic for computing an average difference between lateral position estimates from the plurality of synchronous servo channels, logic for selecting a hypothesis from the number of hypotheses that corresponds to a maximum of the computed average difference, and logic for applying a second control signal to the skew-following loop. The second control signal includes a reference shift value that corresponds to the selected hypothesis. Other systems and methods are also described.
摘要翻译： 根据一个实施例，一种系统包括多个同步伺服通道，每个同步伺服通道包括包含在磁头中的伺服读取器，以及用于将多个第一控制信号施加到偏斜跟随环路的逻辑。 每个第一控制信号包括参考移位值，每个参考移位值对应于多个假设中的一个，并且每个假设对应于一个伺服带组。 该系统还包括用于计算来自多个同步伺服信道的横向位置估计之间的平均差异的逻辑，用于从对应于所计算的平均差的最大值的假设的数量中选择假设的逻辑，以及用于应用第二控制 信号到偏斜跟随环路。 第二控制信号包括对应于所选假设的参考移位值。 还描述了其它系统和方法。
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公开(公告)号：US20110134556A1
公开(公告)日：2011-06-09
申请号：US12630087
申请日：2009-12-03
申请人： Nhan X. Bui , Reed A. Hancock , Kevin B. Judd , Kazuhiro Tsuruta
发明人： Nhan X. Bui , Reed A. Hancock , Kevin B. Judd , Kazuhiro Tsuruta
CPC分类号： G11B5/584
摘要： A method, a servo system and a tape drive are provided to acquire lock on a servo signal. The servo signals of at least one servo element are monitored to detect a valid servo signal. If a valid servo signal is not detected than the fine actuator is moved in a first direction until either a valid servo signal is detected or the fine actuator travel limit is reached. When a valid servo signal is detected, the fine actuator is set to a neutral position and the coarse actuator is moved in the first direction. When the fine actuator travel limit is reached the fine actuator is moved to the first position and the coarse actuator is moved in a second direction, opposite of the first direction.
摘要翻译： 提供一种方法，伺服系统和磁带驱动器来获取对伺服信号的锁定。 监视至少一个伺服元件的伺服信号以检测有效的伺服信号。 如果没有检测到有效的伺服信号比精细致动器沿第一方向移动，直到检测到有效的伺服信号或达到精细执行器行程极限。 当检测到有效的伺服信号时，精细致动器被设定为中立位置，粗略的致动器沿第一方向移动。 当达到精细致动器行程极限时，精细致动器移动到第一位置，并且粗略致动器沿与第一方向相反的第二方向移动。
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公开(公告)号：US07724466B2
公开(公告)日：2010-05-25
申请号：US12036905
申请日：2008-02-25
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： A method and system for servo stripe width detection and compensation including moving a magnetic tape in a first direction across a magnetic tape head, the magnetic tape having a servo band including a first servo pattern and a second servo pattern, the magnetic tape head having a servo element; detecting a leading edge and a trailing edge of the first servo pattern with the servo element; detecting a leading edge and a trailing edge of the second servo pattern with the servo element; determining a first time from the leading edge of the first servo pattern to the leading edge of the second servo pattern; determining a second time from the trailing edge of the first servo pattern to the trailing edge of the second servo pattern; and determining a correction value from a difference between the first time and the second time.
摘要翻译： 一种用于伺服条宽检测和补偿的方法和系统，包括在磁带头上沿第一方向移动磁带，磁带具有包括第一伺服模式和第二伺服模式的伺服带，磁带头具有 伺服元件 用伺服元件检测第一伺服模式的前缘和后缘; 用伺服元件检测第二伺服模式的前缘和后缘; 确定从第一伺服模式的前沿到第二伺服模式的前沿的第一时间; 确定从第一伺服模式的后沿到第二伺服模式的后沿的第二时间; 以及从所述第一时间和所述第二时间之间的差确定校正值。
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8.发明申请公开(公告)号：US20080156919A1
公开(公告)日：2008-07-03
申请号：US11619101
申请日：2007-01-02
IPC分类号： G11B15/48
CPC分类号： G11B15/64 , G11B15/1808 , G11B15/20 , G11B15/43
摘要： Disclosed is a method for reducing occurrences of stick conditions in tape, the method including stopping rotation of a supply reel and take-up reel of a drive that includes a length of tape, a portion of the tape extending between the reels and contacting a head between the reels, wherein the stopping creates a stop condition in the drive, determining if the tape is stuck to the head, dropping tension in the tape between the reels, freeing the tape for movement in a z-direction via the dropping tension, moving the head in y-directions, moving the tape in an x-direction via a rotation of the supply reel a fraction of a rotation, and causing the tape to break contact with the head via the dropping, moving of the tape in the z-direction, moving of the tape in the x-direction, and/or moving of the head in the y-directions.
摘要翻译： 公开了一种用于减少胶带中的条件的发生的方法，该方法包括停止包括一段胶带的驱动器的供带盘和卷取卷轴的旋转，所述带的一部分在卷轴之间延伸并接触头部 在所述卷轴之间，其中所述停止在所述驱动器中产生停止状态，确定所述带是否粘附到所述头部，在所述卷轴之间降低所述带中的张力，释放所述带以通过所述下落张力沿z方向移动，移动 磁头在y方向上，通过供给卷轴的旋转沿x方向移动磁带的一小部分旋转，并且使磁带经由下落，磁带在z轴方向上移动而与头部断开接触， 方向，沿x方向移动胶带，和/或使头部沿y方向移动。
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9.发明授权公开(公告)号：US06791781B2
公开(公告)日：2004-09-14
申请号：US09907307
申请日：2001-07-17
IPC分类号： G11B1518
摘要： A method and apparatus for providing linear position (LPOS) estimations. If valid LPOS data may be detected from the tape, then a first method for LPOS estimation is performed using the Hall effect sensors. If valid LPOS data may not be detected from the tape, then an error recovery procedure (ERP) is invoked so that a second method for LPOS estimation is used to provide accurate LPOS information which is synchronized to a validly detected LPOS from tape within about 1 meter prior to the desired data record.
摘要翻译： 一种用于提供线性位置（LPOS）估计的方法和装置。 如果可以从磁带检测到有效的LPOS数据，则使用霍尔效应传感器执行用于LPOS估计的第一种方法。 如果从磁带无法检测到有效的LPOS数据，则调用错误恢复过程（ERP），以便使用LPOS估计的第二种方法来提供准确的LPOS信息，该LPOS信息与大约1的磁带中的有效检测到的LPOS同步 在所需数据记录之前。
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10.发明授权公开(公告)号：US08760788B2
公开(公告)日：2014-06-24
申请号：US13152225
申请日：2011-06-02
申请人： Nhan X. Bui , Reed A. Hancock , Tomoko Taketomi
发明人： Nhan X. Bui , Reed A. Hancock , Tomoko Taketomi
IPC分类号： G11B15/087 , G11B5/584
CPC分类号： G11B5/56 , G11B5/00817 , G11B5/584 , G11B15/602 , G11B20/10388 , G11B2220/93
摘要： In one embodiment, a tape drive system includes a magnetic head having at least one servo sensor for track-following at least one defined servo track of a longitudinal tape, a tape motion controller configured to move the longitudinal tape past the magnetic head, a compound actuator configured to translate the magnetic head laterally with respect to the longitudinal tape, and a control configured to track-follow the at least one defined servo track by reducing a position error between the magnetic head and a desired position, transition from a write state to a monitor state when the position error is greater than a threshold, transition from the monitor state to a stop write state when the position error is greater than the threshold for a first period, and transition from the monitor state to the write state when the position error is less than the threshold for a second period.
摘要翻译： 在一个实施例中，磁带驱动系统包括具有至少一个伺服传感器的磁头，该伺服传感器跟踪至少一个所定义的纵向磁带的伺服磁道，配置成使纵向磁带移动通过磁头的磁带运动控制器， 致动器被配置为相对于纵向带横向地平移磁头;以及控制器，其被配置为通过减小磁头与期望位置之间的位置误差跟踪至少一个定义的伺服轨迹，控制器从写入状态转换到 当位置误差大于阈值时的监视状态，当位置误差大于第一周期的阈值时从监视状态转变到停止写入状态，以及当位置误差大于阈值时从监视状态转变到写入状态 错误小于第二个周期的阈值。
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