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。

公开(公告)号：US08316162B2

公开(公告)日：2012-11-20

申请号：US12574329

申请日：2009-10-06

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： G06G3/00

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 comprises a buffer, a tape for recording the data to be temporarily stored in the buffer, and a read head. The tape drive further comprises 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，使得驱动器传输速率尽可能接近地匹配主机传输速率，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。

公开(公告)号：US20100095029A1

公开(公告)日：2010-04-15

申请号：US12574329

申请日：2009-10-06

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： G06F3/00

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 comprises a buffer, a tape for recording the data to be temporarily stored in the buffer, and a read head. The tape drive further comprises 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，使得驱动器传输速率尽可能接近地匹配主机传输速率，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。

公开(公告)号：US08756351B2

公开(公告)日：2014-06-17

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： G06F3/00 ,  G11B15/46 ,  G11B15/32

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。

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。

公开(公告)号：US11087797B2

公开(公告)日：2021-08-10

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： G06F3/06 ,  G11B27/00

摘要： There is provided a tape recording apparatus system capable of improving writing performance and maintaining tape recording density, for a multiple data writing request accompanied by a lot of synchronization requests from a host.
The system is a tape storage system including two or more tape drives each of which has a tape mounted thereon and is provided with a buffer divided in fixed-length segments, and connected to a host that sends multiple data and a synchronization request at a predetermined timing to these tape drives. This tape recording system is provided with: a tape drive connected to the host, receiving the multiple data sent from the host, and, when the segment of the buffer is accumulated and filled with data, writing the accumulated data onto a tape; and another tape drive connected to the tape drive, receiving the multiple data sent from the host via the tape drive, and dumping a predetermined number of data accumulated in the segments onto a tape at a timing of receiving the synchronization request.

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：US20090296268A1

公开(公告)日：2009-12-03

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： G11B5/584

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. Once the data is written to the tape, a determining unit determines whether or not to perform backhitchless writing. If backhitchless writing is to be performed, then a speed determining unit determines a tape speed, where the time of data transfer from a host to the buffer is less than the time of data writing from the buffer to the tape. Thereafter, an operation signal output unit instructs a motor driver to change the speed of the tape to the determined tape speed after a backhitch is performed is a speculative FM.

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。 一旦数据被写入到磁带，确定单元确定是否执行无间隙写入。 如果要执行回溯写入，则速度确定单元确定从主机到缓冲器的数据传输时间小于从缓冲器到磁带的数据写入时间的磁带速度。 此后，操作信号输出单元指示电机驱动器在执行后退之后将磁带的速度改变为所确定的磁带速度是推测性FM。

公开(公告)号：US20090303633A1

公开(公告)日：2009-12-10

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： G11B5/584

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：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。