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1.发明申请REDUCING TOTAL SEEK TIME FOR DETERMINING AN ACCESS SEQUENCE OF DATA STORED ON A TAPE MEDIUM 有权减少总时间来确定存储在磁带介质上的数据的访问顺序公开(公告)号：US20140043710A1
公开(公告)日：2014-02-13
申请号：US13570749
申请日：2012-08-09
IPC分类号： G11B5/09
CPC分类号： G11B27/107 , G11B5/5513 , G11B20/10 , G11B2020/10916
摘要： A first data group in an access sequence is selected based on which data group in the data groups has a beginning closest to a current position of the tape medium. Those data groups located in specified regions of the tape medium are separated from other data groups located in alternative specified regions of the tape medium. The distance from the current position of the tape medium is set to be a logical distance value, determined by a calculation function, that is substituted for the physical distance value for the data groups that are located in the specified regions as compared with other data groups located in the alternative specified regions. A second data group in the access sequence is selected based on which remaining data group in the data groups has a beginning closest to an end of the first data group in the access sequence.
摘要翻译： 基于数据组中的哪个数据组具有最接近磁带介质的当前位置的开始来选择访问序列中的第一数据组。 位于带介质的指定区域中的那些数据组与位于磁带介质的备选指定区域中的其他数据组分离。 与磁带介质的当前位置的距离被设置为由计算函数确定的逻辑距离值，其代替与其他数据组相比位于指定区域中的数据组的物理距离值 位于替代指定区域。 基于访问序列中数据组中哪个剩余数据组具有最接近第一数据组的结尾的开始来选择访问序列中的第二数据组。
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2.发明申请METHOD AND SYSTEM FOR DETERMINING ACCESS SEQUENCE OF DATA STORED ON A TAPE MEDIUM 失效用于确定在带状介质上存储的数据的访问顺序的方法和系统公开(公告)号：US20120250176A1
公开(公告)日：2012-10-04
申请号：US13523654
申请日：2012-06-14
IPC分类号： G11B5/09
CPC分类号： G06F3/0641 , G06F3/0611 , G06F3/064 , G06F3/0682 , G06F3/0686 , G11B5/5508 , G11B5/5513 , G11B27/107 , G11B2020/10916 , G11B2220/90
摘要： For determining an access sequence of a plurality of data groups stored on a tape medium, a first data group in the access sequence is selected based on which data group in the plurality of data groups has a beginning closest to a current position of the tape medium. A second data group in the access sequence is selected based on which remaining data group in the plurality of data groups has a beginning closest to an end of the first data group in the access sequence.
摘要翻译： 为了确定存储在磁带介质上的多个数据组的访问顺序，基于多个数据组中的哪个数据组具有最接近磁带介质的当前位置的开始来选择访问序列中的第一数据组 。 基于访问序列中的多个数据组中的哪个剩余数据组具有最接近第一数据组的结尾的开始来选择访问序列中的第二数据组。
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3.发明申请METHOD AND SYSTEM FOR DETERMINING ACCESS SEQUENCE OF DATA STORED ON A TAPE MEDIUM 失效用于确定在带状介质上存储的数据的访问顺序的方法和系统公开(公告)号：US20120154946A1
公开(公告)日：2012-06-21
申请号：US12970631
申请日：2010-12-16
IPC分类号： G11B5/09
CPC分类号： G06F3/0641 , G06F3/0611 , G06F3/064 , G06F3/0682 , G06F3/0686 , G11B5/5508 , G11B5/5513 , G11B27/107 , G11B2020/10916 , G11B2220/90
摘要： Methods, computer systems, and computer program products are provided for determining an access sequence of a plurality of data groups stored on a tape medium. A first data group in the access sequence is selected based on which data group in the plurality of data groups has a beginning closest to a current position of the tape medium. A second data group in the access sequence is selected based on which remaining data group in the plurality of data groups has a beginning closest to an end of the first data group in the access sequence.
摘要翻译： 提供了方法，计算机系统和计算机程序产品，用于确定存储在磁带介质上的多个数据组的访问顺序。 基于多个数据组中的哪个数据组具有最接近磁带介质的当前位置的开始来选择访问序列中的第一数据组。 基于访问序列中的多个数据组中的哪个剩余数据组具有最接近第一数据组的结尾的开始来选择访问序列中的第二数据组。
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公开(公告)号：US20120162807A1
公开(公告)日：2012-06-28
申请号：US12976691
申请日：2010-12-22
申请人： Takashi KATAGIRI , Yutaka OISHI , Yuhko MORI , Hirokazu NAKAYAMA
发明人： Takashi KATAGIRI , Yutaka OISHI , Yuhko MORI , Hirokazu NAKAYAMA
IPC分类号： G11B5/02
CPC分类号： G11B15/026 , G06F2213/0038 , G11B15/20 , G11B20/10 , G11B2020/10916 , G11B2220/956
摘要： Methods, computer systems, and computer program products are provided for operating a tape drive comprising a tape medium with a plurality of record groups stored thereon. Access sequence for the plurality of record groups is provided. The tape medium is positioned for reading a record group in the access sequence before a seek command for the record group in the access sequence is received.
摘要翻译： 提供了方法，计算机系统和计算机程序产品，用于操作包括其上存储有多个记录组的带介质的磁带机。 提供了多个记录组的访问顺序。 在接收到接入序列中的记录组的寻道命令之前，磁带介质被定位用于在访问序列中读取记录组。
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5.发明申请TRANSPORT SPEED ADJUSTMENT DEVICE, TRANSPORT SPEED ADJUSTMENT METHOD AND TRANSPORT SPEED ADJUSTMENT PROGRAM FOR ADJUSTING TRANSPORT SPEED OF TAPE MEDIUM 失效运输速度调整装置，运输速度调整方法和运输速度调整程序，用于调整胶带传送速度公开(公告)号：US20120206831A1
公开(公告)日：2012-08-16
申请号：US13458828
申请日：2012-04-27
IPC分类号： G11B15/46
CPC分类号： G11B15/46 , G11B15/1875 , G11B20/10527 , G11B2020/10703 , G11B2020/10981 , G11B2220/90
摘要： A tape drive capable of switching the transport speed of a tape medium among multilevel speeds calculates a data transfer rate from/to a host device, and selects an adjustment mode of the transport speed of the tape medium from a constant speed mode and a speed switch mode according to the calculated data transfer rate. The tape drive in the speed switch mode, pauses a data write or read operation to switch the transport speed of the tape medium while data is written at a first transport speed and when an available capacity of a buffer memory reaches a data volume to be received from the host device during switching of the transport speed and is read out at the first transport speed and when a data volume of a buffer memory reaches a data volume to be transmitted to the host device during switching of the transport speed.
摘要翻译： 能够切换多层速度的带介质的传送速度的磁带驱动器计算从主装置的数据传送速率，并从恒速模式和速度切换中选择磁带介质的传送速度的调整模式 模式根据计算的数据传输速率。 磁带驱动器处于速度切换模式时，暂停数据写入或读取操作以切换磁带介质的传输速度，同时以第一传输速度写入数据，并且当缓冲存储器的可用容量达到要接收的数据量时 在传输速度的切换期间从主机设备读取并以第一传输速度读出，并且当缓冲存储器的数据量到达传输速度转换期间传送给主机设备的数据量时。
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6.发明申请TRANSPORT SPEED ADJUSTMENT DEVICE, TRANSPORT SPEED ADJUSTMENT METHOD AND TRANSPORT SPEED ADJUSTMENT PROGRAM FOR ADJUSTING TRANSPORT SPEED OF TAPE MEDIUM 失效运输速度调整装置，运输速度调整方法和运输速度调整程序，用于调整胶带传送速度公开(公告)号：US20110116185A1
公开(公告)日：2011-05-19
申请号：US13002894
申请日：2009-07-03
IPC分类号： G11B15/46
CPC分类号： G11B15/46 , G11B15/1875 , G11B20/10527 , G11B2020/10703 , G11B2020/10981 , G11B2220/90
摘要： A tape drive capable of switching the transport speed of a tape medium among multilevel speeds calculates a data transfer rate from/to a host device, and selects an adjustment mode of the transport speed of the tape medium from a constant speed mode and a speed switch mode according to the calculated data transfer rate. The tape drive in the speed switch mode, pauses a data write or read operation to switch the transport speed of the tape medium while data is written at a first transport speed and when an available capacity of a buffer memory reaches a data volume to be received from the host device during switching of the transport speed and is read out at the first transport speed and when a data volume of a buffer memory reaches a data volume to be transmitted to the host device during switching of the transport speed.
摘要翻译： 能够切换多层速度的带介质的传送速度的磁带驱动器计算从主装置的数据传送速率，并从恒速模式和速度切换中选择磁带介质的传送速度的调整模式 模式根据计算的数据传输速率。 磁带驱动器处于速度切换模式时，暂停数据写入或读取操作以切换磁带介质的传输速度，同时以第一传输速度写入数据，并且当缓冲存储器的可用容量达到要接收的数据量时 在传输速度的切换期间从主机设备读取并以第一传输速度读出，并且当缓冲存储器的数据量到达传输速度转换期间传送给主机设备的数据量时。
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公开(公告)号：US20140063634A1
公开(公告)日：2014-03-06
申请号：US13599644
申请日：2012-08-30
IPC分类号： G11B5/09
CPC分类号： G06F3/061 , G06F3/0638 , G06F3/0643 , G06F3/0656 , G06F3/0682 , G06F5/06 , G06F5/10 , G06F13/385 , G06F2003/0691 , G06F2003/0698 , G11B5/00821 , G11B5/012 , G11B5/09 , G11B20/10481
摘要： Records and filemarks read from data segments are aggregated into at least one single data segment. The records and the filemarks are reorganized and restructured in the single data segment such that buffer utilization is improved.
摘要翻译： 从数据段读取的记录和文件标记被聚合成至少一个单个数据段。 记录和文件标记在单个数据段中进行重组和重组，以提高缓冲区利用率。
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公开(公告)号：US20110051280A1
公开(公告)日：2011-03-03
申请号：US12551280
申请日：2009-08-31
申请人： James M. KARP , Takashi KATAGIRI , Motoko OE , Yutaka OISHI
发明人： James M. KARP , Takashi KATAGIRI , Motoko OE , Yutaka OISHI
IPC分类号： G11B15/46
CPC分类号： G11B15/02 , G11B20/10527 , G11B2220/90
摘要： Various embodiments for writing received synchronized data to magnetic tape having a plurality of wraps using a magnetic tape drive adapted for performing the writing according to an available plurality of predefined tape speeds are provided. In one such embodiment, for each of the available plurality of predefined tape speeds, an average overhead per synchronized command for performing a recursively accumulated backhitchless flush (RABF) cycle is calculated. One of the available plurality of predefined tape speeds having a lowest calculated average overhead is selected. The RABF cycle is performed using the selected one of the available plurality of predefined tape speeds.
摘要翻译： 提供了用于使用适于根据可用的多个预定磁带速度执行写入的磁带驱动器将接收的同步数据写入具有多个卷绕的磁带的各种实施例。 在一个这样的实施例中，对于可用的多个预定义的磁带速度中的每一个，计算用于执行递归累积的反向无间隙冲洗（RABF）周期的每个同步命令的平均开销。 选择具有最低计算平均开销的可用多个预定磁带速度之一。 使用所选择的可用多个预定磁带速度之一来执行RABF周期。
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