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    Reducing total seek time for determining an access sequence of data stored on a tape medium
    1.
    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
    6.
    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。

    WRITE PROCEDURE USING ESTIMATED BEST SETTING IN FIRST RUN
    7.
    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
    8.
    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。

    TAPE DRIVE, TAPE DRIVE RECORDING SYSTEM, AND METHOD FOR SELECTING IMPROVED TAPE SPEED IN RESPONSE TO INTERMITTENT READ REQUESTS
    9.
    发明申请
    TAPE DRIVE, TAPE DRIVE RECORDING SYSTEM, AND METHOD FOR SELECTING IMPROVED TAPE SPEED IN RESPONSE TO INTERMITTENT READ REQUESTS 有权
    磁带驱动器，磁带驱动器记录系统以及用于选择改进的磁带速度以响应于间接读取请求的方法

    公开(公告)号：US20120290784A1

    公开(公告)日：2012-11-15

    申请号：US13560990

    申请日：2012-07-27

    申请人： Takashi Katagiri ,  Hirokazu Nakayama ,  Motoko Oe ,  Yutaka Oishi

    发明人： Takashi Katagiri ,  Hirokazu Nakayama ,  Motoko Oe ,  Yutaka Oishi

    IPC分类号： G06F12/00

    CPC分类号： G11B15/46 ,  G11B15/32

    摘要： A tape drive, tape drive recording system, and method are provided for improving tape speed selection during data transfer. The tape drive includes a buffer, a tape for recording the data to be temporarily stored in the buffer, and a read head. The tape drive further includes a reading controller that initially sets a tape speed such that a drive transfer rate matches a host transfer rate as closely as possible and that drives the tape at the tape speed. To address backhitching caused by one or more host transfer halts, the reading controller subsequently adjusts the tape speed such that the drive transfer rate is lower than the host transfer rate by recalculating the host transfer rate in consideration of the host transfer and the host transfer halt and setting the tape speed such that the drive transfer rate matches the recalculated host transfer rate as closely as possible.

    摘要翻译： 提供磁带驱动器，磁带驱动器记录系统和方法，用于在数据传输期间提高磁带速度选择。 磁带驱动器包括缓冲器，用于记录要临时存储在缓冲器中的数据的磁带和读取头。 磁带驱动器还包括读取控制器，该读取控制器最初设置磁带速度，使得驱动器传送速率尽可能接近主机传送速率，并以磁带速度驱动磁带。 为了解决由一个或多个主机传送暂停引起的后跳，读取控制器随后调整磁带速度，使得考虑到主机传输和主机传输中止重新计算主机传输速率，驱动器传输速率低于主机传输速率 并且设置磁带速度使得驱动器传送速率尽可能接近于重新计算的主机传输速率。

    Apparatus and method for controlling data writing to a tape medium
    10.
    发明授权
    Apparatus and method for controlling data writing to a tape medium 有权
    用于控制对磁带介质写入数据的装置和方法

    公开(公告)号：US08810951B2

    公开(公告)日：2014-08-19

    申请号：US13509605

    申请日：2010-08-02

    申请人： Atsushi Abe ,  Takashi Katagiri ,  Hironobu Nagura ,  Hirokazu Nakayama ,  Yutaka Oishi ,  Katsumi Yoshimura

    发明人： Atsushi Abe ,  Takashi Katagiri ,  Hironobu Nagura ,  Hirokazu Nakayama ,  Yutaka Oishi ,  Katsumi Yoshimura

    IPC分类号： G11B15/46 ,  G11B5/09 ,  G06F13/00

    CPC分类号： G11B5/00821 ,  G11B5/09 ,  G11B15/20 ,  G11B20/10527 ,  G11B2020/10759 ,  G11B2220/90

    摘要： Data of a target capacity calculated by a nominal capacity of a tape medium minus a data capacity lost due to execution of backhitchless writing is written to the tape medium. In a tape drive, a command processing unit 41 receives a synchronization command, and a buffer management unit passes data in a buffer to a channel input-output unit. Upon completion of writing the data to the tape, a backhitch determination unit determines whether a mode information storage unit stores information indicating that a high data rate mode is on, whether data of a target capacity can be written to the tape, and whether the written data can be read at a target read data rate. An operation signal output unit issues a command to execute backhitch in case these conditions are not satisfied.

    摘要翻译： 通过磁带介质的标称容量计算出的目标容量的数据减去由于执行无间距写入而丢失的数据容量的数据被写入磁带介质。 在磁带驱动器中，命令处理单元41接收同步命令，并且缓冲器管理单元将缓冲器中的数据传送到通道输入 - 输出单元。 在完成向磁带写入数据时，后退判定单元确定模式信息存储单元是否存储指示高数据速率模式开启的信息，目标容量的数据是否可以写入磁带，以及是否写入 可以以目标读取数据速率读取数据。 在这些条件不满足的情况下，操作信号输出单元发出执行回传的命令。