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1.发明申请Servo techniques that mitigate an effect of read and write velocity variations on position error signal calculations 审中-公开伺服技术可减轻读写速度变化对位置误差信号计算的影响公开(公告)号：US20080144211A1
公开(公告)日：2008-06-19
申请号：US11641422
申请日：2006-12-18
申请人： Mark P. Weber , Denis J. Langlois
发明人： Mark P. Weber , Denis J. Langlois
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： In general, the invention is directed to servo techniques that make use of time-based servo patterns that can substantially mitigate error in a position error signal (PES) calculation resulting from a variation in tape velocity. A servo pattern including at least three marks is written using a single pulse and a single servo head such that the spacing of the servo marks in the servo pattern is not dependent on write velocity. By measuring the time between detection of at least three servo marks in the servo pattern, a ratio of time increments can be used to factor out read tape velocity. In order to facilitate this effect, techniques for determining the relationship between a ratio of time increments and a PES signal are described. Also described are techniques for configuring a servo pattern that provides a linear relationship between a ratio of time increments and a PES signal.
摘要翻译： 通常，本发明涉及使用基于时间的伺服模式的伺服技术，其可以基本上减轻由于磁带速度的变化导致的位置误差信号（PES）计算中的误差。 使用单个脉冲和单个伺服头写入包括至少三个标记的伺服模式，使得伺服模式中的伺服标记的间隔不依赖于写入速度。 通过测量伺服模式中至少三个伺服标记的检测之间的时间，可以使用时间增量的比例来确定读取磁带速度。 为了促进这种效果，描述了用于确定时间增量的比率与PES信号之间的关系的技术。 还描述了用于配置提供时间增量的比率和PES信号之间的线性关系的伺服模式的技术。
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公开(公告)号：US07221534B2
公开(公告)日：2007-05-22
申请号：US11051371
申请日：2005-02-03
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： The invention proposes the use of a piezoelectric crystal element as an actuator for data storage systems. In particular, the piezoelectric crystal element mechanically positions a head with respect to a data storage medium. More specifically, the invention may use a piezoelectric laminate crystal structure as a fine positioning actuator in a magnetic tape system in order to precisely position one or more heads with respect to tracks of the magnetic tape. Furthermore, in order to address hysteresis in the piezoelectric crystal element, the invention proposes the introduction of a high frequency periodic signal as part of the input to the piezoelectric crystal element.
摘要翻译： 本发明提出使用压电晶体元件作为数据存储系统的致动器。 特别地，压电晶体元件相对于数据存储介质机械地定位磁头。 更具体地，本发明可以使用压电层压晶体结构作为磁带系统中的精细定位致动器，以便相对于磁带的轨道精确地定位一个或多个磁头。 此外，为了解决压电晶体元件中的滞后现象，本发明提出了作为输入到压电晶体元件的一部分的高频周期信号的引入。
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公开(公告)号：US07538969B2
公开(公告)日：2009-05-26
申请号：US11508508
申请日：2006-08-23
申请人： Mark P. Weber , Alan R. Olson
发明人： Mark P. Weber , Alan R. Olson
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： Data storage tape comprises one or more data tracks and a servo band. The servo band stores a plurality of servo patterns within a servo frame to facilitate head positioning relative to the data tracks. Spacings between the servo patterns within the servo frame vary to encode information in the servo frame. A number of bits in the information is greater than a number of servo patterns within the frame. Servo patterns in different servo bands on the data storage tape may be different to provide band identification information. The different servo patterns of the different servo bands may allow lateral position calculations using the same formula for each servo pattern.
摘要翻译： 数据存储磁带包括一个或多个数据磁道和伺服磁带。 伺服带在伺服帧内存储多个伺服模式以便于相对于数据轨道的头部定位。 伺服帧内的伺服模式之间的间距会变化，从而对伺服帧中的信息进行编码。 信息中的位数大于帧内的多个伺服模式。 数据存储带上的不同伺服频带中的伺服模式可能不同，以提供频带识别信息。 不同伺服带的不同伺服模式可以允许对于每个伺服模式使用相同的公式进行横向位置计算。
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公开(公告)号：US20080198500A1
公开(公告)日：2008-08-21
申请号：US11708762
申请日：2007-02-20
IPC分类号： G11B5/596
CPC分类号： G11B5/584
摘要： In general, the invention is directed to servo techniques that utilize servo patterns to facilitate head positioning relative to the data tracks. For example, the servo techniques may include a first series of servo patterns configured to allow calculation of a position error signal that substantially mitigates error resulting from a variation in velocity of the data storage tape during detection of the at least one of the servo patterns in the first series. The servo techniques may also include a second series of servo patterns interleaved within the first series of servo patterns in order to encode data. The encoded data may include linear position information. Embodiments may allow a data storage tape meeting a currently accepted data storage tape specification, e.g., an LTO Ultrium specification, to record data in a higher density than currently implemented with the specification.
摘要翻译： 通常，本发明涉及利用伺服模式以便于相对于数据轨道进行头部定位的伺服技术。 例如，伺服技术可以包括第一系列伺服模式，所述第一系列伺服模式被配置为允许计算位置误差信号，所述位置误差信号基本上减轻在检测到所述伺服模式中的至少一个伺服模式期间数据存储带的速度变化导致的误差 第一个系列。 伺服技术还可以包括在第一系列伺服模式中交错的第二系列伺服模式，以便对数据进行编码。 编码数据可以包括线性位置信息。 实施例可以允许满足当前接受的数据存储磁带规范（例如LTO Ultrium规范）的数据存储磁带以比当前在说明书中实现的密度更高的密度记录数据。
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公开(公告)号：US20080049356A1
公开(公告)日：2008-02-28
申请号：US11508508
申请日：2006-08-23
申请人： Mark P. Weber , Alan R. Olson
发明人： Mark P. Weber , Alan R. Olson
CPC分类号： G11B5/584
摘要： Data storage tape comprises one or more data tracks and a servo band. The servo band stores a plurality of servo patterns within a servo frame to facilitate head positioning relative to the data tracks. Spacings between the servo patterns within the servo frame vary to encode information in the servo frame. A number of bits in the information is greater than a number of servo patterns within the frame. Servo patterns in different servo bands on the data storage tape may be different to provide band identification information. The different servo patterns of the different servo bands may allow lateral position calculations using the same formula for each servo pattern.
摘要翻译： 数据存储磁带包括一个或多个数据磁道和伺服磁带。 伺服带在伺服帧内存储多个伺服模式以便于相对于数据轨道的头部定位。 伺服帧内的伺服模式之间的间距会变化，从而对伺服帧中的信息进行编码。 信息中的位数大于帧内的多个伺服模式。 数据存储带上的不同伺服频带中的伺服模式可能不同，以提供频带识别信息。 不同伺服带的不同伺服模式可以允许对于每个伺服模式使用相同的公式进行横向位置计算。
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公开(公告)号：US07495859B2
公开(公告)日：2009-02-24
申请号：US11708762
申请日：2007-02-20
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： In general, the invention is directed to servo techniques that utilize servo patterns to facilitate head positioning relative to the data tracks. For example, the servo techniques may include a first series of servo patterns configured to allow calculation of a position error signal that substantially mitigates error resulting from a variation in velocity of the data storage tape during detection of the at least one of the servo patterns in the first series. The servo techniques may also include a second series of servo patterns interleaved within the first series of servo patterns in order to encode data. The encoded data may include linear position information. Embodiments may allow a data storage tape meeting a currently accepted data storage tape specification, e.g., an LTO Ultrium specification, to record data in a higher density than currently implemented with the specification.
摘要翻译： 通常，本发明涉及利用伺服模式以便于相对于数据轨道进行头部定位的伺服技术。 例如，伺服技术可以包括第一系列伺服模式，所述第一系列伺服模式被配置为允许计算位置误差信号，所述位置误差信号基本上减轻在检测到所述伺服模式中的至少一个伺服模式期间数据存储带的速度变化导致的误差 第一个系列。 伺服技术还可以包括在第一系列伺服模式中交错的第二系列伺服模式，以便对数据进行编码。 编码数据可以包括线性位置信息。 实施例可以允许满足当前接受的数据存储磁带规范（例如LTO Ultrium规范）的数据存储磁带以比当前在说明书中实现的密度更高的密度记录数据。
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公开(公告)号：US07199958B2
公开(公告)日：2007-04-03
申请号：US10927403
申请日：2004-08-25
申请人： Mark P. Weber , Yung Yip
发明人： Mark P. Weber , Yung Yip
CPC分类号： G11B5/584
摘要： A servo head comprising a write gap with a non-uniform width is described. It allows non-uniform width servo marks to be recorded on magnetic media. A servo head having a non-uniform width gap may create servo marks that facilitate servo position error signal calculations using time-based methods, amplitude-based methods, or both. This invention provides alternative methods for positioning servo heads and may increase reliability and precision by allowing redundant calculations.
摘要翻译： 描述了包括具有不均匀宽度的写入间隙的伺服头。 它允许在磁性介质上记录不均匀的宽度伺服标记。 具有不均匀宽度间隙的伺服头可以产生使用基于时间的方法，基于振幅的方法或两者有助于伺服位置误差信号计算的伺服标记。 本发明提供了用于定位伺服头的替代方法，并且可以通过允许冗余计算来提高可靠性和精度。
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