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    Reducing total seek time for determining an access sequence of data stored on a tape medium
    3.
    发明授权
    Reducing total seek time for determining an access sequence of data stored on a tape medium 有权
    减少用于确定存储在磁带介质上的数据的访问顺序的总寻道时间

    公开(公告)号：US08867160B2

    公开(公告)日：2014-10-21

    申请号：US13570749

    申请日：2012-08-09

    申请人： Takashi Katagiri ,  Yuhko Mori ,  Masakatsu Murata ,  Hirokazu Nakayama ,  Yutaka Oishi

    发明人： Takashi Katagiri ,  Yuhko Mori ,  Masakatsu Murata ,  Hirokazu Nakayama ,  Yutaka Oishi

    IPC分类号： G11B15/18

    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。

    APPARATUS AND METHOD FOR CONTROLLING TRANSPORTATION OF TAPE MEDIUM
    7.
    发明申请
    APPARATUS AND METHOD FOR CONTROLLING TRANSPORTATION OF TAPE MEDIUM 有权
    用于控制胶带传输的装置和方法

    公开(公告)号：US20120229931A1

    公开(公告)日：2012-09-13

    申请号：US13510608

    申请日：2010-09-28

    申请人： Takashi Katagiri ,  Yuhko Mori ,  Yutaka Oishi

    发明人： Takashi Katagiri ,  Yuhko Mori ,  Yutaka Oishi

    IPC分类号： G11B15/46 ,  G11B5/008

    CPC分类号： G11B15/442 ,  G06F3/0613 ,  G06F3/0656 ,  G06F3/0682 ,  G06F2003/0691 ,  G11B5/00813 ,  G11B15/20 ,  G11B15/26 ,  G11B15/444 ,  G11B20/10009 ,  G11B20/10527 ,  G11B27/36 ,  G11B2020/10759 ,  G11B2220/90

    摘要： High performance is obtained without preventing achievement of a target read data rate.In a controller 16 of a tape drive, a command processing unit 41 receives a synchronization command, and a buffer management unit 42 passes data in a buffer to a channel input-output unit 43. Then, upon completion of writing the data to the tape, a backhitch determination unit 44 determines whether or not to execute backhitch. If it is determined that backhitch should be skipped, the speed determination unit 46 determines a tape speed that minimizes a sum of a time required to write data without backhitch within a range where a data amount of a monitor target is to be written in order to achieve a target read data rate, and a time required to write data with backhitch within the range. Then, an operation signal output unit 49 issues an instruction to change the tape speed to the determined tape speed after execution of backhitch.

    摘要翻译： 在不防止实现目标读取数据速率的情况下获得高性能。 在磁带驱动器的控制器16中，命令处理单元41接收同步命令，并且缓冲器管理单元42将缓冲器中的数据传送到通道输入 - 输出单元43.然后，在将数据写入磁带 后退确定单元44确定是否执行回传。 如果确定应该跳过后退，则速度确定单元46确定在将要写入数据量的监视对象的数据量写入的范围内将数据写入不需要后退所需的时间的总和最小化的带速度，以便 实现目标读取数据速率，以及在该范围内写回数据的数据所需的时间。 然后，操作信号输出单元49在执行后退之后发出将磁带速度改变到所确定的磁带速度的指令。

    TAPE STORAGE SYSTEM INCLUDING MULTIPLE TAPE STORAGE APPARATUSES
    8.
    发明申请
    TAPE STORAGE SYSTEM INCLUDING MULTIPLE TAPE STORAGE APPARATUSES 审中-公开
    包括多个录像带存储设备的卷带存储系统

    公开(公告)号：US20120079185A1

    公开(公告)日：2012-03-29

    申请号：US13376151

    申请日：2010-06-15

    申请人： Atsushi Abe ,  Takashi Katagiri ,  Motoko Oe ,  Setsuko Masuda ,  Yutaka Oishi ,  Noriko Yamamoto ,  Katsumi Yoshimura

    发明人： Atsushi Abe ,  Takashi Katagiri ,  Motoko Oe ,  Setsuko Masuda ,  Yutaka Oishi ,  Noriko Yamamoto ,  Katsumi Yoshimura

    IPC分类号： G06F12/00

    CPC分类号： G11B27/002 ,  G11B2220/90

    摘要： A tape storage system according to one embodiment includes two or more tape storage apparatuses each having a buffer divided in fixed-length segments, and being connectable to a host, where a first of the tape storage apparatuses is configured to receive multiple data clusters and a synchronization request from a host, and, when one of the segments of the buffer is accumulated and filled with the data, to write the accumulated data onto a tape. A second of the tape storage apparatuses is connected to the first tape storage apparatus, the second tape storage apparatus being configured to receive the multiple data clusters sent from the host via the first tape storage apparatus, and being configured to write a predetermined number of data clusters accumulated in the segments thereof onto a second tape at a timing corresponding to the synchronization request.

    摘要翻译： 根据一个实施例的磁带存储系统包括两个或更多个磁带存储设备，每个磁带存储设备具有以固定长度段划分的缓冲器，并且可连接到主机，其中第一磁带存储设备被配置为接收多个数据集群，并且 来自主机的同步请求，并且当缓冲器的一个段被累积并填充数据时，将累积的数据写入磁带。 第二磁带存储装置连接到第一磁带存储装置，第二磁带存储装置被配置为经由第一磁带存储装置接收从主机发送的多个数据集群，并且被配置为写入预定数量的数据 在对应于同步请求的定时，将其在其段中累积的群集分组到第二磁带上。

    WRITE PROCEDURE USING ESTIMATED BEST SETTING IN FIRST RUN
    9.
    发明申请
    WRITE PROCEDURE USING ESTIMATED BEST SETTING IN FIRST RUN 有权
    在第一次运行中使用估计最佳设置的写入程序

    公开(公告)号：US20130275666A1

    公开(公告)日：2013-10-17

    申请号：US13449219

    申请日：2012-04-17

    申请人： James M. Karp ,  Takashi Katagiri ,  Yuhko Mori ,  Yutaka Oishi

    发明人： James M. Karp ,  Takashi Katagiri ,  Yuhko Mori ,  Yutaka Oishi

    IPC分类号： G06F12/00

    CPC分类号： G06F3/0608 ,  G06F3/0653 ,  G06F3/0659 ,  G06F3/0682 ,  G06F2003/0698 ,  G11B5/00813 ,  G11B5/00817 ,  G11B2220/90

    摘要： In one general embodiment, a tape drive system includes: a read channel; a write channel; logic configured to receiving a request for a write operation to be performed in a tape drive; logic configured to determine an optimum a write procedure in response to receiving the request, the determining being based on expected writing times of each of a plurality of write procedures and an expected transaction size of a next write operation; and logic configured to invoke the determined optimum write procedure in response to determining the optimum write procedure.

    摘要翻译： 在一个一般实施例中，磁带驱动系统包括：读通道; 写通道; 被配置为接收在磁带驱动器中执行写入操作的请求的逻辑; 配置为响应于接收到所述请求而确定最佳写入过程的逻辑，所述确定基于多个写入过程中的每一个的预期写入时间和下一个写入操作的预期事务大小; 以及被配置为响应于确定最佳写入过程而调用所确定的最佳写入过程的逻辑。

    Controlling transportation of tape medium
    10.
    发明授权
    Controlling transportation of tape medium 有权
    控制胶带介质的运输

    公开(公告)号：US08913337B2

    公开(公告)日：2014-12-16

    申请号：US13510608

    申请日：2010-09-28

    申请人： Takashi Katagiri ,  Yuhko Mori ,  Yutaka Oishi

    发明人： Takashi Katagiri ,  Yuhko Mori ,  Yutaka Oishi

    IPC分类号： G11B5/09 ,  G11B15/46 ,  G11B20/10 ,  G11B27/36 ,  G11B15/26

    CPC分类号： G11B15/442 ,  G06F3/0613 ,  G06F3/0656 ,  G06F3/0682 ,  G06F2003/0691 ,  G11B5/00813 ,  G11B15/20 ,  G11B15/26 ,  G11B15/444 ,  G11B20/10009 ,  G11B20/10527 ,  G11B27/36 ,  G11B2020/10759 ,  G11B2220/90

    摘要： High performance is obtained without preventing achievement of a target read data rate.In a controller 16 of a tape drive, a command processing unit 41 receives a synchronization command, and a buffer management unit 42 passes data in a buffer to a channel input-output unit 43. Then, upon completion of writing the data to the tape, a backhitch determination unit 44 determines whether or not to execute backhitch. If it is determined that backhitch should be skipped, the speed determination unit 46 determines a tape speed that minimizes a sum of a time required to write data without backhitch within a range where a data amount of a monitor target is to be written in order to achieve a target read data rate, and a time required to write data with backhitch within the range. Then, an operation signal output unit 49 issues an instruction to change the tape speed to the determined tape speed after execution of backhitch.

    摘要翻译： 在不防止实现目标读取数据速率的情况下获得高性能。 在磁带驱动器的控制器16中，命令处理单元41接收同步命令，并且缓冲器管理单元42将缓冲器中的数据传送到通道输入 - 输出单元43.然后，在将数据写入磁带 后退确定单元44确定是否执行回传。 如果确定应该跳过后退，则速度确定单元46确定在将要写入数据量的监视对象的数据量写入的范围内将数据写入无需后退所需的时间的总和最小化的带速度，以便 实现目标读取数据速率，以及在该范围内写回数据的数据所需的时间。 然后，操作信号输出单元49在执行后退之后发出将磁带速度改变到所确定的磁带速度的指令。