公开(公告)号：US08035912B2

公开(公告)日：2011-10-11

申请号：US12474544

申请日：2009-05-29

申请人： Takashi Katagiri ,  Motoko Oe

发明人： Takashi Katagiri ,  Motoko Oe

IPC分类号： G11B15/46 ,  G11B15/48

CPC分类号： G11B5/584 ,  G11B15/473

摘要： A system and method for controlling the traveling of a tape is provided. The system and method include passing data in a buffer to a channel input/output unit for writing the data to a tape. A determining unit determines if second data is to be written to the tape without performing a backhitch after first data is written to the tape. The determination unit also determines a state of the system before writing the first data to the tape and compares an amount of second data written to the tape prior to writing first data to the tape with an amount of second data expected to be written to the tape to an area up to a position on the tape where writing the first data commenced, for determining if the second data is to be written to the tape without performing a backhitch. A speed adjusting unit adjusts the speed of the tape to prevent a backhitch due to the buffer running out of data when the determination unit determines that the second data is to be written to the tape without performing a backhitch.

摘要翻译： 提供了一种用于控制磁带行进的系统和方法。 系统和方法包括将缓冲器中的数据传送到用于将数据写入磁带的通道输入/输出单元。 确定单元在将第一数据写入磁带之后，确定是否将第二数据写入磁带而不执行后退。 确定单元还在将第一数据写入磁带之前确定系统的状态，并将预先写入磁带的第二数据量写入磁带之前将写入磁带的第二数据的量进行比较 到达写入第一数据开始的磁带上的位置的区域，用于确定是否将第二数据写入磁带而不执行后退。 当确定单元确定第二数据要被写入磁带而不执行后退时，速度调节单元调节磁带的速度以防止由于缓冲器用尽数据而导致的后退。

公开(公告)号：US20110222379A1

公开(公告)日：2011-09-15

申请号：US13128875

申请日：2009-09-28

申请人： Takashi Katagiri

发明人： Takashi Katagiri

IPC分类号： G11B11/00

CPC分类号： G11B20/18 ,  G11B15/04 ,  G11B20/10 ,  G11B2020/10898 ,  G11B2020/183 ,  G11B2220/90

摘要： A data-overwriting technique that facilitates determining whether data is new or old, when reading thereof. A tape recording apparatus includes: a receiving unit for receiving information on overwrite starting position and an overwrite request; a trying unit for trying to determine a beginning position of a data unit based on the information on an overwrite starting position, wherein the data unit is a unit of writing data recorded on a tape medium; an overwrite executing unit for executing overwriting from the determined overwrite starting position in response to a success of the determination by the trying unit; and a type judging unit for judging whether the data unit that is recorded at the overwrite starting position is a null data unit or not in response to a failure of the determination by the trying unit. The trying unit responds to judgment that the data unit is the null data unit by trying to determine a beginning of a data unit following the data unit as the overwrite starting position.

摘要翻译： 一种有助于确定数据是新的还是旧的数据重写技术。 磁带记录装置包括：接收单元，用于接收关于重写起始位置和重写请求的信息; 尝试单元，用于基于关于覆盖开始位置的信息来尝试确定数据单元的开始位置，其中所述数据单元是记录在磁带介质上的数据的写入单元; 覆盖执行单元，用于响应于所述尝试单元的确定的成功，从所确定的覆盖开始位置执行覆盖; 以及类型判断单元，用于响应于所述尝试单元的确定失败，判断所述重写开始位置记录的数据单元是否为空数据单元。 尝试单元通过尝试确定数据单元之后的数据单元的开始作为覆盖开始位置来响应判断数据单元是空数据单元。

公开(公告)号：US07995303B2

公开(公告)日：2011-08-09

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。

公开(公告)号：US07903363B2

公开(公告)日：2011-03-08

申请号：US12134091

申请日：2008-06-05

申请人： Hiroshi Itagaki ,  James Mitchell Karp ,  Takashi Katagiri ,  Motoko Oe ,  Yutaka Ooishi

发明人： Hiroshi Itagaki ,  James Mitchell Karp ,  Takashi Katagiri ,  Motoko Oe ,  Yutaka Ooishi

IPC分类号： G11B15/18 ,  G11B15/44

CPC分类号： G11B5/00813 ,  G11B5/584

摘要： A method to write information to a tape storage medium by disposing a tape storage medium in a tape drive apparatus comprising a write head. The method moves the tape storage medium in a first direction, writes data from a buffer to the tape storage medium, and thereby empties the buffer while the tape storage medium is moving in the first direction. The method determines, while the tape storage medium is moving in the first direction, whether to enable a backhitchless write wherein the tape storage medium is not stopped and moved in a second and opposition direction, prior to writing new data to the tape storage medium. By not stopping the movement of the tape storage medium, and by not moving the tape storage medium in a reverse direction to reposition the write head, the method eliminates the time overhead required to stop the tape and reposition the tape head. Applicants' method achieves this time efficiency without adverse impact to the nominal storage capacity of the tape information medium.

摘要翻译： 一种通过将带存储介质配置在包括写入头的带驱动装置中来将信息写入磁带存储介质的方法。 该方法使磁带存储介质沿第一方向移动，将数据从缓冲器写入磁带存储介质，从而在磁带存储介质沿第一方向移动时清空缓冲器。 该方法在磁带存储介质在第一方向上移动时，确定在将新数据写入磁带存储介质之前是否启用磁带存储介质在第二和相对方向上不停止和移动的无间隙写入。 通过不停止磁带存储介质的移动，并且通过不使磁带存储介质沿相反方向移动以重新定位写入头，该方法消除了停止磁带所需的时间开销并重新定位磁带头。 申请人的方法实现了这种时间效率，而不会对磁带信息介质的标称存储容量产生不利影响。

公开(公告)号：US07710681B2

公开(公告)日：2010-05-04

申请号：US11759161

申请日：2007-06-06

申请人： Hiroshi Itagaki ,  James Mitchell Karp ,  Takashi Katagiri

发明人： Hiroshi Itagaki ,  James Mitchell Karp ,  Takashi Katagiri

IPC分类号： G11B15/46

CPC分类号： G11B15/4676 ,  G11B15/4733

摘要： Provided are techniques for determining a tape speed for a next sync operation. A sync command is received. An average transaction size and an average host transfer rate of a set of previous sync operations are calculated. The tape speed for the next sync operation is determined using the average transaction size, the average host transfer rate, and a backhitch time. Data is written to a tape cartridge using the determined tape speed.

摘要翻译： 提供了用于确定下一个同步操作的磁带速度的技术。 接收到sync命令。 计算一组先前同步操作的平均事务大小和平均主机传输速率。 下一个同步操作的磁带速度是使用平均事务大小，平均主机传输速率和后退时间来确定的。 使用确定的磁带速度将数据写入磁带盒。

公开(公告)号：US07490253B2

公开(公告)日：2009-02-10

申请号：US11092797

申请日：2005-03-30

申请人： Kazuo Yoshioka ,  Tomohiro Nakagawa ,  Yoshiyuki Shirasaki ,  Takashi Katagiri

发明人： Kazuo Yoshioka ,  Tomohiro Nakagawa ,  Yoshiyuki Shirasaki ,  Takashi Katagiri

IPC分类号： G06F1/00 ,  G06F1/32 ,  G06F11/30 ,  G09G3/36

CPC分类号： G09G3/3406 ,  G09G2320/0626 ,  G09G2330/021 ,  G09G2360/144

摘要： An illuminance sensor detects an illuminance value for an environment in which a display device is placed and provides the illuminance value to a controller. The controller determines whether to cause the display device to make a transition to a power saving mode or not in accordance with the illuminance value inputted thereto. For the transition to the power saving mode, the controller stops the operation of a backlight drive signal generator to turn off a backlight unit, and stops the supply of power and a display signal to a liquid crystal panel.

摘要翻译： 照度传感器检测放置显示装置的环境的照度值，并将照度值提供给控制器。 控制器根据输入的照度值，决定是否使显示装置转换到省电模式。 为了转换到省电模式，控制器停止背光驱动信号发生器的操作以关闭背光单元，并停止对液晶面板的供电和显示信号。

公开(公告)号：US20060256466A1

公开(公告)日：2006-11-16

申请号：US11383105

申请日：2006-05-12

申请人： Takashi Katagiri ,  Hirokazu Nakayama

发明人： Takashi Katagiri ,  Hirokazu Nakayama

IPC分类号： G11B21/02

CPC分类号： G11B20/10527 ,  G11B2020/10703 ,  G11B2220/90

摘要： A method of controlling a drive of a recording medium according to one embodiment includes receiving data from a host, and writing the data to the recording medium. A difference in volume between the data at the time of being written to the recording medium is detected. An adjustment is made to at least one of a first transfer rate with the recording medium, and a second transfer rate with the host, based on the difference.

摘要翻译： 根据一个实施例的控制记录介质的驱动的方法包括从主机接收数据，并将数据写入记录介质。 检测写入记录介质时的数据之间的体积差异。 基于差异，对与记录介质的第一传送速率和主机的第二传送速率中的至少一个进行调整。

公开(公告)号：US5235262A

公开(公告)日：1993-08-10

申请号：US830349

申请日：1992-01-31

申请人： Tsuneto Takeuchi ,  Takashi Katagiri

发明人： Tsuneto Takeuchi ,  Takashi Katagiri

IPC分类号： G05B19/23

CPC分类号： G05B19/237

摘要： A motor control apparatus composed of a first pulse multiplier circuit for multiplying command pulses by a first factor, encoder circuit for detecting a position of a motor-driven object, a second pulse multiplier circuit for multiplying a detection pulse from the encoder circuit by a second factor, a deviation counter circuit for detecting a difference between output pulses of the first and second multipliers, a divider circuit for dividing an output signal of the deviation counter by the second factor, and driving source driven by the control apparatus in accordance with an output of the divider.

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。

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。