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1. 发明授权

US06865043B2 Data set information for recovery of synchronized data on magnetic tape 失效
标题翻译：用于恢复磁带上同步数据的数据集信息
公开(公告)号：US06865043B2
公开(公告)日：2005-03-08
申请号：US10293550
申请日：2002-11-14
申请人： Toshimi Ataku , Paul Merrill Greco , Hiroshi Itagaki , Glen Alan Jaquette , Hironobu Nagura , Toshiyuki Shiratori
发明人： Toshimi Ataku , Paul Merrill Greco , Hiroshi Itagaki , Glen Alan Jaquette , Hironobu Nagura , Toshiyuki Shiratori
IPC分类号： G06F3/06 , G11B20/10 , G11B20/12 , G11B20/14 , G11B27/30 , G11B5/09
CPC分类号： G11B27/3027 , G06F3/0601 , G06F2003/0698 , G11B20/10527 , G11B20/1201 , G11B20/1403 , G11B2020/1062 , G11B2220/216 , G11B2220/90 , G11B2220/95
摘要： Special fields for error recovery are provided in data set information tables of data sets written with synchronized transactions. If a transaction only partially fills a data set, that data set is rewritten in a succeeding data set, appending the next transaction. A moving access point in the table identifies the appended transaction, allowing the rewritten transaction to be skipped during read recovery. The table provides recovery trails by providing a thread to tie the data sets together, the status of the data set, and pointers, such as identifying the wrap of the immediately succeeding data set.
摘要翻译：在用同步事务写入的数据集的数据集信息表中提供了用于错误恢复的特殊字段。如果事务仅部分填充数据集，则该数据集将重写在后续数据集中，附加下一个事务。表中的移动接入点标识附加的事务，允许在读取恢复期间跳过重写的事务。该表通过提供线程将数据集合在一起，数据集的状态和指针（例如标识紧随其后的数据集的换行）来提供恢复路径。

2. 发明授权

US06950257B1 Writing to magnetic tape with backhitchless backspacing and data set invalidation 失效
标题翻译：写入磁带带有后跟反向间隔和数据集无效
公开(公告)号：US06950257B1
公开(公告)日：2005-09-27
申请号：US10836671
申请日：2004-04-29
申请人： Paul Merrill Greco , Glen Alan Jaquette , Hiroshi Itagaki , Hironobu Nagura , Hirokazu Nakayama , Satoshi Tohji , Terue Watanabe
发明人： Paul Merrill Greco , Glen Alan Jaquette , Hiroshi Itagaki , Hironobu Nagura , Hirokazu Nakayama , Satoshi Tohji , Terue Watanabe
IPC分类号： G11B5/008 , G11B5/09 , G11B15/087 , G11B15/20 , G11B20/10 , G11B20/12 , G11B27/032 , G11B27/036 , G11B27/30 , G11B27/32
CPC分类号： G11B20/1205 , G11B5/00813 , G11B15/087 , G11B15/20 , G11B20/10 , G11B27/032 , G11B27/036 , G11B27/3027 , G11B27/328 , G11B2020/10898 , G11B2020/10907 , G11B2220/90
摘要： Backspacing over data to overwrite the data as recorded on magnetic tape is provided logically, rather than by causing a magnetic tape to drive to backhitch. The data is written to the magnetic tape as it was before it was logically changed in order to insure that the data is preserved on tape. Recovery of the data is from a succeeding data set which logically invalidates the original data by a superseding identifier. Control logic arranges data transactions for writing to magnetic tape as data sets; and, in response to backspace and overwrite commands, or when transactions are accumulated into a succeeding data set, rewrites the original transaction adjusted in accordance with the commands as a superseding data set downstream from the original transaction, logically invalidating the original transaction by setting a superseding identifier in the superseding data set(s).
摘要翻译：逻辑上提供了对数据进行覆盖以覆盖磁带上记录的数据，而不是通过使磁带驱动到后退。数据被写入磁带，因为它是在逻辑上改变之前，以确保数据保存在磁带上。来自后续数据集的数据的恢复，其通过替代标识符逻辑地使原始数据无效。控制逻辑将数据交易写入磁带作为数据集; 并且响应于退格和重写命令，或者当事务被累积到后续数据集中时，重写根据命令调整的原始事务作为来自原始事务下游的替代数据集，通过设置原始事务来逻辑地使原始事务无效在取代的数据集中替代标识符。

3. 发明授权

US07350021B2 Method of controlling write and read of data for tape recording apparatus 失效
标题翻译：控制磁带记录装置的数据写入和读取的方法
公开(公告)号：US07350021B2
公开(公告)日：2008-03-25
申请号：US11535045
申请日：2006-09-25
申请人： Hiroshi Itagaki , Takashi Katagiri , Hironobu Nagura , Hirokazu Nakayama , Yutaka Oishi , Toshiyuki Shiratori , Terue Watanabe
发明人： Hiroshi Itagaki , Takashi Katagiri , Hironobu Nagura , Hirokazu Nakayama , Yutaka Oishi , Toshiyuki Shiratori , Terue Watanabe
IPC分类号： G06F12/00
CPC分类号： G11B5/09 , G11B5/00821 , G11B20/10527 , G11B20/1201 , G11B2020/10666 , G11B2020/10759 , G11B2220/90
摘要： A write/read control method for recording at least one datum on a magnetic tape within a predetermined distance is provided. The method includes sequentially accumulating a plurality of blocks of data of variable length in a buffer divided into fixed length segments and writing the contents of each segment to the tape. If the segment contains at least one block of data, the data is written to the tape as a dataset and if the segment does not contain any data, then a null dataset is written to the tape within the predetermined distance. The predetermined distance may vary depending upon the format of a tape drive embodying the method. In response to a request to read a block of data, reading at least one dataset that includes the requested block of data from the tape to segments in the buffer, and reading the requested block of data for invalidating data transfer of a null dataset in the segment. By invalidating the transfer of a null dataset, blocks of data separated by the null dataset can be reconstructed.
摘要翻译：提供了一种用于在预定距离内在磁带上记录至少一个基准的写/读控制方法。该方法包括在分成固定长度段的缓冲器中顺序地累积可变长度的多个数据块，并将每个段的内容写入磁带。如果段包含至少一个数据块，则将数据作为数据集写入磁带，如果段不包含任何数据，则在预定距离内将空数据集写入磁带。预定距离可以根据实施该方法的磁带驱动器的格式而变化。响应于读取数据块的请求，读取至少一个包含所请求的数据块的数据从磁带到缓冲器中的段，并且读取所请求的数据块以使数据传输在分割。通过使空数据集的传输无效，可以重建由空数据集分隔的数据块。

4. 发明申请

US20070079059A1 METHOD OF CONTROLLING WRITE AND READ OF DATA FOR TAPE RECORDING APPARATUS 失效
标题翻译：控制磁带记录装置的写入和读取数据的方法
公开(公告)号：US20070079059A1
公开(公告)日：2007-04-05
申请号：US11535045
申请日：2006-09-25
申请人： Hiroshi Itagaki , Takashi Katagiri , Hironobu Nagura , Hirokazu Nakayama , Yutaka Oishi , Toshiyuki Shiratori , Terue Watanabe
发明人： Hiroshi Itagaki , Takashi Katagiri , Hironobu Nagura , Hirokazu Nakayama , Yutaka Oishi , Toshiyuki Shiratori , Terue Watanabe
IPC分类号： G06F13/00
CPC分类号： G11B5/09 , G11B5/00821 , G11B20/10527 , G11B20/1201 , G11B2020/10666 , G11B2020/10759 , G11B2220/90
摘要： A write/read control method for recording at least one datum on a magnetic tape within a predetermined distance is provided. The method includes sequentially accumulating a plurality of blocks of data of variable length in a buffer divided into fixed length segments and writing the contents of each segment to the tape. If the segment contains at least one block of data, the data is written to the tape as a dataset and if the segment does not contain any data, then a null dataset is written to the tape within the predetermined distance. The predetermined distance may vary depending upon the format of a tape drive embodying the method. In response to a request to read a block of data, reading at least one dataset that includes the requested block of data from the tape to segments in the buffer, and reading the requested block of data for invalidating data transfer of a null dataset in the segment. By invalidating the transfer of a null dataset, blocks of data separated by the null dataset can be reconstructed.
摘要翻译：提供了一种用于在预定距离内在磁带上记录至少一个基准的写/读控制方法。该方法包括在分成固定长度段的缓冲器中顺序地累积可变长度的多个数据块，并将每个段的内容写入磁带。如果段包含至少一个数据块，则将数据作为数据集写入磁带，如果段不包含任何数据，则在预定距离内将空数据集写入磁带。预定距离可以根据实施该方法的磁带驱动器的格式而变化。响应于读取数据块的请求，读取至少一个包含所请求的数据块的数据从磁带到缓冲器中的段，并且读取所请求的数据块以使数据传输在分割。通过使空数据集的传输无效，可以重建由空数据集分隔的数据块。

5. 发明申请

US20070226336A1 Method and apparatus for evaluating performance on host data transfer within a tape drive 失效
标题翻译：用于评估磁带驱动器内主机数据传输性能的方法和装置
公开(公告)号：US20070226336A1
公开(公告)日：2007-09-27
申请号：US11700996
申请日：2007-02-01
申请人： Takashi Katagiri , Hironobu Nagura , Hirokazu Nakayama , Kazuhiro Ozeki
发明人： Takashi Katagiri , Hironobu Nagura , Hirokazu Nakayama , Kazuhiro Ozeki
IPC分类号： G06F15/173
CPC分类号： H04L41/06 , G06F3/0613 , G06F3/0614 , G06F3/0653 , G06F3/0656 , G06F3/0682 , G06F11/008 , G06F11/0727 , G06F11/076 , G06F11/3485 , H04L43/0817 , H04L43/16
摘要： A method for evaluating data transfer performance within a data recording apparatus is disclosed. The data recording apparatus includes a buffer and a recording medium. Initially, a Pause time P when data transfer between the buffer and a host being stopped temporarily is measured. Then, an ideal Pause time Y is determined. Next, a determination is made whether or not the Pause time P exceeds a sum of the ideal Pause time Y and an allowance a. If the Pause time P exceeds a sum of the ideal Pause time Y and the allowance a, a warning signal is sent to the host.
摘要翻译：公开了一种用于评估数据记录装置内的数据传送性能的方法。数据记录装置包括缓冲器和记录介质。首先测量缓冲区和临时停止的主机之间的数据传输时的暂停时间P. 然后，确定理想的暂停时间Y. 接下来，确定暂停时间P是否超过理想暂停时间Y和余量a之和。如果暂停时间P超过理想暂停时间Y和余数a的总和，则向主机发送警告信号。

6. 发明授权

US06421807B1 Decoding apparatus, processing apparatus and methods therefor 有权
标题翻译：解码装置，处理装置及其方法
公开(公告)号：US06421807B1
公开(公告)日：2002-07-16
申请号：US09343946
申请日：1999-06-30
申请人： Akio Nakamura , Tetsuya Tamura , Masayuki Demura , Hironobu Nagura
发明人： Akio Nakamura , Tetsuya Tamura , Masayuki Demura , Hironobu Nagura
IPC分类号： H03M1300
CPC分类号： H03M13/1535 , H03M13/158
摘要： An apparatus and method for decoding data encoded in a linear cyclic code with less hardware than the prior art decoding apparatus without sacrificing the processing speed are described. The polynomial arithmetic part 14 derives polynomials &sgr;(x), &ohgr;(x) by repeating calculation of the following Qi(x), exchange of polynomials between the register U_reg 180 and the register X_reg 184, and exchange of polynomials between the register Y_reg 182 and the register Z_reg 186 until the degree (deg Xreg) of the polynomial in the register X_reg 184 becomes smaller than [(d−h+1)/2] to solve the following recursive formula. [recursive formula]=&sgr;i(x)=&sgr;i−2(x)+Qi(x)·&sgr;i−1(x) &ohgr;i(x)=&ohgr;i−2(x)+Qi(x)·&ohgr;i−1(x) where Qi(x) is a quotient of &ohgr;i−2(x)/&ohgr;i−1(x) &sgr;−1(x)=1, &ohgr;−1(x)=x2t &sgr;0(x)=1, &ohgr;0(x)=M(x)
摘要翻译：描述了以比现有技术的解码装置更少的硬件对以循环码进行编码的数据进行解码而不牺牲处理速度的装置和方法。多项式运算部分14通过重复计算以下的Qi（x），在寄存器U_reg 180和寄存器X_reg 184之间的多项式的交换以及寄存器Y_reg 182之间的多项式的交换来导出多项式sigma（x），ω（x）和寄存器Z_reg 186，直到寄存器X_reg 184中的多项式的度（deg Xreg）变得小于[（d-h + 1）/ 2]来求解以下递归公式。其中，Qi（x）是 omega-2（x）/ omegai-1（x）sigma-1（x）= 1，ω-1（x）= x2t sigma0（x）= 1，omega0（x）= M

7. 发明授权

US06553533B2 Method and apparatus for detecting and correcting errors and erasures in product ECC-coded data arrays for DVD and similar storage subsystems 有权
标题翻译：用于检测和纠正DVD和类似存储子系统的ECC编码数据阵列中的错误和擦除的方法和装置
公开(公告)号：US06553533B2
公开(公告)日：2003-04-22
申请号：US09245803
申请日：1999-02-05
申请人： Masayuki Demura , Hironobu Nagura , Tetsuya Tamura , Keisuke Tanaka
发明人： Masayuki Demura , Hironobu Nagura , Tetsuya Tamura , Keisuke Tanaka
IPC分类号： G11C2900
CPC分类号： G06F11/1008 , G11B20/10 , G11B20/18 , H03M13/1515 , H03M13/29 , H03M13/2909 , H03M13/293
摘要： A method and apparatus for detecting and correcting errors and erasures in product-coded data arrays by iterative syndrome processing array data in row major order and column major order. A first dense map is formed for classifying each row containing location indicia of random errors, their correction patterns, and pointers to rows containing erasure errors. This map is used to effectuate row array random error corrections in place in memory. A second dense map is formed of location indicia and correction patterns for each pair adjacent position within a column containing erasure errors as indexed by a counterpart row pointer. The second map is used to effectuate column array erasure corrections and random error corrections in place in memory.
摘要翻译：一种检测和校正产品编码数据阵列中的错误和消除误差的方法和装置，通过迭代校正处理阵列数据以行主序和列主序列。形成第一密集地图，用于将包含随机错误的位置标记，它们的校正模式和指向包含擦除错误的行的指针的每行分类。该映射用于在存储器中实现行阵列随机误差校正。第二密集地图由位置标记和校正图案形成，每个对相邻位置在包含由对应行指针索引的擦除错误的列内。第二个映射用于在存储器中实现列阵列擦除校正和随机错误校正。

8. 发明授权

US07496696B2 Method and apparatus for evaluating performance on host data transfer within a tape drive 失效
标题翻译：用于评估磁带驱动器内主机数据传输性能的方法和装置
公开(公告)号：US07496696B2
公开(公告)日：2009-02-24
申请号：US11700996
申请日：2007-02-01
申请人： Takashi Katagiri , Hironobu Nagura , Hirokazu Nakayama , Kazuhiro Ozeki
发明人： Takashi Katagiri , Hironobu Nagura , Hirokazu Nakayama , Kazuhiro Ozeki
IPC分类号： G06F3/00
CPC分类号： H04L41/06 , G06F3/0613 , G06F3/0614 , G06F3/0653 , G06F3/0656 , G06F3/0682 , G06F11/008 , G06F11/0727 , G06F11/076 , G06F11/3485 , H04L43/0817 , H04L43/16
摘要： A method for evaluating data transfer performance within a data recording apparatus is disclosed. The data recording apparatus includes a buffer and a recording medium. Initially, a Pause time P when data transfer between the buffer and a host being stopped temporarily is measured. Then, an ideal Pause time Y is determined. Next, a determination is made whether or not the Pause time P exceeds a sum of the ideal Pause time Y and an allowance a. If the Pause time P exceeds a sum of the ideal Pause time Y and the allowance a, a warning signal is sent to the host.
摘要翻译：公开了一种用于评估数据记录装置内的数据传送性能的方法。数据记录装置包括缓冲器和记录介质。首先测量缓冲区和临时停止的主机之间的数据传输时的暂停时间P. 然后，确定理想的暂停时间Y. 接下来，确定暂停时间P是否超过理想暂停时间Y和余数a之和。如果暂停时间P超过理想暂停时间Y和余数a的总和，则向主机发送警告信号。

9. 发明授权

US08810951B2 Apparatus and method for controlling data writing to a tape medium 有权
标题翻译：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。

10. 发明申请

US20120293887A1 APPARATUS AND METHOD FOR CONTROLLING DATA WRITING TO A TAPE MEDIUM 有权
标题翻译：用于控制向磁带介质写入数据的装置和方法
公开(公告)号：US20120293887A1
公开(公告)日：2012-11-22
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： G11B5/02
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。

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