公开(公告)号：US20100172047A1

公开(公告)日：2010-07-08

申请号：US12350108

申请日：2009-01-07

申请人： Evangelos S. Eleftheriou ,  Robert Allen Hutchins ,  Hisato Matsuo ,  Sedat Oelcer

发明人： Evangelos S. Eleftheriou ,  Robert Allen Hutchins ,  Hisato Matsuo ,  Sedat Oelcer

IPC分类号： G11B20/10 ,  G11B5/78

CPC分类号： G11B20/10009 ,  G11B20/10055 ,  G11B20/10175 ,  G11B20/10222 ,  G11B2220/90

摘要： A system in one embodiment includes multiple analog inputs for receiving readback signals, an analog to digital converter coupled to each of the analog inputs for converting the readback signals to digital signals, a buffer coupled to outputs of the analog to digital converters for at least temporarily storing the digital signals, and a digital processing section also coupled to outputs of the analog to digital converters for processing the digital signals for reconstructing data therefrom. A method in one embodiment includes receiving multiple channels of analog readback signals from a magnetic head, converting the analog signals in each channel to digital signals, buffering the digital signals, and outputting the buffered digital signals. A method in another embodiment includes receiving a readback waveform from a magnetic storage device, reducing a frequency offset of the readback waveform, and generating a synchronized, oversampled waveform from the readback waveform.

摘要翻译： 一个实施例中的系统包括用于接收回读信号的多个模拟输入，耦合到每个模拟输入的模数转换器，用于将回读信号转换成数字信号;耦合到模数转换器的输出的缓冲器，用于至少暂时地 存储数字信号，以及数字处理部分，其耦合到模数转换器的输出端，用于处理数字信号以从其重构数据。 一个实施例中的方法包括从磁头接收多个通道的模拟回读信号，将每个通道中的模拟信号转换成数字信号，缓冲数字信号，并输出缓冲的数字信号。 另一实施例中的方法包括从磁存储设备接收回读波形，减少回读波形的频率偏移，以及从回读波形生成同步的过采样波形。

公开(公告)号：US08094397B2

公开(公告)日：2012-01-10

申请号：US12350108

申请日：2009-01-07

申请人： Evangelos S. Eleftheriou ,  Robert Allen Hutchins ,  Hisato Matsuo ,  Sedat Oelcer

发明人： Evangelos S. Eleftheriou ,  Robert Allen Hutchins ,  Hisato Matsuo ,  Sedat Oelcer

IPC分类号： G11B5/09

CPC分类号： G11B20/10009 ,  G11B20/10055 ,  G11B20/10175 ,  G11B20/10222 ,  G11B2220/90

摘要： A system in one embodiment includes multiple analog inputs for receiving readback signals, an analog to digital converter coupled to each of the analog inputs for converting the readback signals to digital signals, a buffer coupled to outputs of the analog to digital converters for at least temporarily storing the digital signals, and a digital processing section also coupled to outputs of the analog to digital converters for processing the digital signals for reconstructing data therefrom. A method in one embodiment includes receiving multiple channels of analog readback signals from a magnetic head, converting the analog signals in each channel to digital signals, buffering the digital signals, and outputting the buffered digital signals. A method in another embodiment includes receiving a readback waveform from a magnetic storage device, reducing a frequency offset of the readback waveform, and generating a synchronized, oversampled waveform from the readback waveform.

摘要翻译： 一个实施例中的系统包括用于接收回读信号的多个模拟输入，耦合到每个模拟输入的模数转换器，用于将回读信号转换成数字信号;耦合到模数转换器的输出的缓冲器，用于至少暂时地 存储数字信号，以及数字处理部分，其耦合到模数转换器的输出端，用于处理数字信号以从其重构数据。 一个实施例中的方法包括从磁头接收多个通道的模拟回读信号，将每个通道中的模拟信号转换成数字信号，缓冲数字信号，并输出缓冲的数字信号。 另一实施例中的方法包括从磁存储设备接收回读波形，减少回读波形的频率偏移，以及从回读波形生成同步的过采样波形。

公开(公告)号：US20100180180A1

公开(公告)日：2010-07-15

申请号：US12351738

申请日：2009-01-09

申请人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

发明人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

IPC分类号： H03M13/27 ,  G06F11/10

CPC分类号： H03M13/2909 ,  G11B20/1202 ,  G11B20/1833 ,  G11B20/1866 ,  G11B2020/1836 ,  G11B2020/1853 ,  G11B2220/93 ,  H03M13/15 ,  H03M13/1515

摘要： Conventional C2 coding and interleaving for multi-track data tape in LTO-¾ do not support recording data onto a number of concurrent tracks which is not a power of two. Higher-rate longer C2 codes, which do not degrade error rate performance, are provided. An adjustable format and interleaving scheme accommodates future tape drives in which the number of concurrent tracks is not necessarily a power of two. A data set is segmented into a plurality of unencoded subdata sets and parity bytes are generated for each row and column. The parameters of the C2 code include N2 as the least common multiple of the number of possible tracks to which codeword objects are to be written. COs are formed from N2 C1 codewords, mapped onto a logical data track according to information within headers of the CO and modulation encoded into synchronized COs which are written to the tape.

摘要翻译： LTO-¾中的多轨数据磁带的常规C2编码和交织不支持将数据记录到不是2的幂的多个并发轨道上。 提供了更高速率的更长的C2代码，这不会降低错误率性能。 可调格式和交错方案适应将来的磁带驱动器，其中并发轨道的数量不一定是二的幂。 将数据集分割为多个未编码的子数据集，并为每行和列生成奇偶校验字节。 C2码的参数包括N2作为要写入码字对象的可能轨道数的最小公倍数。 CO由N2 C1码字形成，根据CO的头部内的信息和被编码成被写入到磁带的同步的CO的调制信号映射到逻辑数据轨道上。

公开(公告)号：US20100177422A1

公开(公告)日：2010-07-15

申请号：US12351747

申请日：2009-01-09

申请人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

发明人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

IPC分类号： G11B5/09 ,  G11B5/78

CPC分类号： G11B20/1833 ,  G11B20/1201 ,  G11B20/1866 ,  G11B2020/1287 ,  G11B2020/1289 ,  G11B2020/1446 ,  G11B2020/1836 ,  G11B2220/93 ,  H03M13/27 ,  H03M13/271

摘要： For writing data to multi-track tape, a received data set is received and segmented into unencoded subdata sets, each comprising an array having K2 rows and K1 columns. For each unencoded subdata set, N1−K1 C1-parity bytes are generated for each row and N2−K2 C2-parity bytes are generated for each column. The C1 and C2 parity bytes are appended to the ends of the row and column, respectively, to form encoded C1 and C2 codewords, respectively. All of the C1 codewords per data set are endowed with a specific codeword header to form a plurality of partial codeword objects (PCOs). Each PCO is mapped onto a logical data track according to information within the header. On each logical data track, adjacent PCOs are merged to form COs which are modulation encoded and mapped into synchronized COs. Then T synchronized COs are written simultaneously to the data tape where T is the number of concurrent active tracks on the data tape.

摘要翻译： 为了将数据写入多轨磁带，接收到的数据集并被分割成未编码的子数据集，每个子​​集包括具有K2行和K1列的阵列。 对于每个未编码的子数据集，为每行生成N1-K1 C1-奇偶校验字节，并为每列生成N2-K2 C2-奇偶校验字节。 C1和C2奇偶校验字节分别附加到行和列的末端，分别形成编码的C1和C2码字。 每个数据集的所有C1码字都具有特定的码字头以形成多个部分码字对象（PCO）。 每个PCO根据标题内的信息被映射到逻辑数据轨道上。 在每个逻辑数据轨道上，相邻的PCO被合并以形成被调制编码并被映射到同步的CO中的CO。 然后将T同步的CO同时写入数据磁带，其中T是数据磁带上的并发活动磁道的数量。

公开(公告)号：US08276045B2

公开(公告)日：2012-09-25

申请号：US12351738

申请日：2009-01-09

申请人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

发明人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

IPC分类号： G11C29/00

CPC分类号： H03M13/2909 ,  G11B20/1202 ,  G11B20/1833 ,  G11B20/1866 ,  G11B2020/1836 ,  G11B2020/1853 ,  G11B2220/93 ,  H03M13/15 ,  H03M13/1515

摘要： Conventional C2 coding and interleaving for multi-track data tape in LTO-3/4 do not support recording data onto a number of concurrent tracks which is not a power of two. Higher-rate longer C2 codes, which do not degrade error rate performance, are provided. An adjustable format and interleaving scheme accommodates future tape drives in which the number of concurrent tracks is not necessarily a power of two. A data set is segmented into a plurality of unencoded subdata sets and parity bytes are generated for each row and column. The parameters of the C2 code include N2 as the least common multiple of the number of possible tracks to which codeword objects are to be written. COs are formed from N2 C1 codewords, mapped onto a logical data track according to information within headers of the CO and modulation encoded into synchronized COs which are written to the tape.

摘要翻译： LTO-3/4中的多轨数据磁带的常规C2编码和交织不支持将数据记录到不是2的幂的多个并发磁道上。 提供了更高速率的更长的C2代码，这不会降低错误率性能。 可调格式和交错方案适应将来的磁带驱动器，其中并发轨道的数量不一定是二的幂。 将数据集分割为多个未编码的子数据集，并为每行和列生成奇偶校验字节。 C2码的参数包括N2作为要写入码字对象的可能轨道数的最小公倍数。 CO由N 2 C1码字形成，根据被写入到磁带的编码到同步的CO中的CO和报头中的信息映射到逻辑数据轨道。

公开(公告)号：US07876516B2

公开(公告)日：2011-01-25

申请号：US12351747

申请日：2009-01-09

申请人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

发明人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

IPC分类号： G11B5/09 ,  G11B20/14

CPC分类号： G11B20/1833 ,  G11B20/1201 ,  G11B20/1866 ,  G11B2020/1287 ,  G11B2020/1289 ,  G11B2020/1446 ,  G11B2020/1836 ,  G11B2220/93 ,  H03M13/27 ,  H03M13/271

摘要： For writing data to multi-track tape, a received data set is received and segmented into unencoded subdata sets, each comprising an array having K2 rows and K1 columns. For each unencoded subdata set, N1-K1 C1-parity bytes are generated for each row and N2-K2 C2-parity bytes are generated for each column. The C1 and C2 parity bytes are appended to the ends of the row and column, respectively, to form encoded C1 and C2 codewords, respectively. All of the C1 codewords per data set are endowed with a specific codeword header to form a plurality of partial codeword objects (PCOs). Each PCO is mapped onto a logical data track according to information within the header. On each logical data track, adjacent PCOs are merged to form COs which are modulation encoded and mapped into synchronized COs. Then T synchronized COs are written simultaneously to the data tape where T is the number of concurrent active tracks on the data tape.

摘要翻译： 为了将数据写入多轨磁带，接收到的数据集并被分割成未编码的子数据集，每个子​​集包括具有K2行和K1列的阵列。 对于每个未编码的子数据集，为每行生成N1-K1 C1-奇偶校验字节，并为每列生成N2-K2 C2-奇偶校验字节。 C1和C2奇偶校验字节分别附加到行和列的末端，分别形成编码的C1和C2码字。 每个数据集的所有C1码字都具有特定的码字头以形成多个部分码字对象（PCO）。 每个PCO根据标题内的信息被映射到逻辑数据轨道上。 在每个逻辑数据轨道上，相邻的PCO被合并以形成被调制编码并被映射到同步的CO中的CO。 然后将T同步的CO同时写入数据磁带，其中T是数据磁带上的并发活动磁道的数量。

公开(公告)号：US20100177421A1

公开(公告)日：2010-07-15

申请号：US12351725

申请日：2009-01-09

申请人： Masayuki Demura ,  Glen Jaquette ,  Hisato Matsuo ,  Keisuke Tanaka

发明人： Masayuki Demura ,  Glen Jaquette ,  Hisato Matsuo ,  Keisuke Tanaka

IPC分类号： G11B5/09 ,  G11B15/00

CPC分类号： G11B20/1201 ,  G11B20/18 ,  G11B20/1866 ,  G11B2020/1222 ,  G11B2220/90 ,  H03M13/271 ,  H03M13/2909

摘要： Methods, logic, apparatus and computer program product write data, comprising less than a full Data Set, to magnetic tape. Data is received from a host, a do-not-interleave command is issued and C1 and C2 ECC are computed. Codeword Quad (CQ) sets are then formed. At least one CQ set of the Data Set is written to a magnetic tape in a non-interleaved manner and a Data Set Information Table (DSIT) is written to the magnetic tape immediately following the at least one written CQ set. An address transformation may be used to cancel interleaving. Writing a CQ set may include writing a plurality of contiguous instances of the CQ set to the magnetic tape to maintain the effectiveness of ECC capability.

摘要翻译： 方法，逻辑，设备和计算机程序产品写入数据，包括少于一个完整的数据集，到磁带。 从主机接收数据，发出不交错命令，并计算C1和C2 ECC。 然后形成Codeword Quad（CQ）集合。 将数据集的至少一个CQ集以非交错方式写入磁带，并且数据集信息表（DSIT）被写入紧跟在至少一个写入的CQ集之后的磁带上。 可以使用地址变换来取消交织。 编写CQ集可以包括将CQ集的多个连续实例写入磁带以保持ECC能力的有效性。

公开(公告)号：US20140059286A1

公开(公告)日：2014-02-27

申请号：US13989743

申请日：2011-10-06

申请人： Hisato Matsuo ,  Rika Nagahara ,  Kenji Ohtani

发明人： Hisato Matsuo ,  Rika Nagahara ,  Kenji Ohtani

IPC分类号： G06F13/16

CPC分类号： G11C7/1048 ,  G06F13/1642 ,  G06F13/1647 ,  G06F13/1663 ,  G06F13/4234 ,  G11C7/1072

摘要： Provided is a memory access device for a shared memory mechanism of main memory for a plurality of CPUs. The present invention includes a plurality of CPUs using memory as main memory, another function block using memory as a buffer, a CPU interface which controls access transfer from the plurality of CPUs to memory, and a DRAM controller for performing arbitration of the access transfer to the memory. Therein, the CPU interface causes access requests from the plurality of CPUs to wait, and receives and stores the address, data transfer mode and data size of each access, notifies the DRAM controller of the access requests, and then, upon receiving grant signals for the access requests, sends information to the DRAM controller according to the grant signals, whereupon the DRAM controller receives the grant signals, and on the basis of the access arbitration, specifies CPUs for which transfers have been granted so as to send the grant signals to the CPU interface.

摘要翻译： 提供了一种用于多个CPU的主存储器的共享存储器机构的存储器访问装置。 本发明包括使用存储器作为主存储器的多个CPU，使用存储器作为缓冲器的另一功能块，控制从多个CPU到存储器的访问传输的CPU接口，以及用于执行访问转移的仲裁的DRAM控制器 记忆。 其中，CPU接口使得来自多个CPU的访问请求等待，并且接收并存储每个访问的地址，数据传输模式和数据大小，向DRAM控制器通知访问请求，然后在接收到 访问请求根据授权信号向DRAM控制器发送信息，于是DRAM控制器接收授权信号，并且基于访问仲裁，指定已经被授权传输的CPU，以便将授权信号发送到 CPU接口。

公开(公告)号：US20120210194A1

公开(公告)日：2012-08-16

申请号：US13451233

申请日：2012-04-19

申请人： Roy D. Cideciyan ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Kenji Ohtani ,  Paul J. Seger ,  Keisuke Tanaka

发明人： Roy D. Cideciyan ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Kenji Ohtani ,  Paul J. Seger ,  Keisuke Tanaka

IPC分类号： H03M13/05 ,  G06F11/10

CPC分类号： G11B20/18 ,  G11B2020/184 ,  G11B2020/1853 ,  G11B2220/90

摘要： A method for integrating data and header protection in tape drives includes receiving an array of data organized into rows and columns. The array is extended to include one or more headers for each row of data in the array. The method provides two dimensions of error correction code (ECC) protection for the data in the array and a single dimension of ECC protection for the headers in the array. A corresponding apparatus is also disclosed herein.

摘要翻译： 在磁带驱动器中集成数据和头部保护的方法包括接收一组数据组织成行和列。 该数组被扩展以包括数组中每行数据的一个或多个头。 该方法为阵列中的数据提供了二维纠错码（ECC）保护，并为阵列中的标头提供了ECC保护的一个维度。 本文还公开了相应的装置。

公开(公告)号：US20080209420A1

公开(公告)日：2008-08-28

申请号：US12039412

申请日：2008-02-28

申请人： Hisato Matsuo

发明人： Hisato Matsuo

IPC分类号： G06F9/46

CPC分类号： G06F3/0656 ,  G06F3/0613 ,  G06F3/0682

摘要： Provided is a technology capable of managing the processing status of hardware blocks by a less number of registers. A processing system includes a buffer composed of a plurality of segments which store data, which is to be input to the processing system, in transactions in the order of inputting, respectively; a plurality of processing units which perform a series of processes in a given order for the data; a plurality of first tables corresponding to the plurality of processing units, respectively, the first tables each storing beginning information which indicates a beginning segment among a plurality of segments at continuous addresses completed in the process by the corresponding processing unit, end information which indicates an end segment among them, and existence information which indicates the presence or absence of segments completed in the process by the corresponding processing unit; and a management unit which manages a data transfer between the buffer and the plurality of processing units so that the series of processes are performed in a given order on the basis of the processing status of the series of processes retained in the plurality of first tables.

摘要翻译： 提供了能够通过较少数量的寄存器来管理硬件块的处理状态的技术。 一种处理系统，包括分别以输入顺序存储要输入到处理系统的数据的多个段的缓冲器; 多个处理单元，以给定顺序执行数据的一系列处理; 分别对应于多个处理单元的多个第一表，每个存储开始信息的第一表，其中表示在相应处理单元处理完成的连续地址的多个段中的起始段，表示一个 以及存在信息，其指示由对应的处理单元在该处理中完成的段的存在或不存在; 以及管理单元，其管理所述缓冲器和所述多个处理单元之间的数据传送，使得根据保持在所述多个第一表中的所述一系列处理的处理状态，以给定的顺序执行所述一系列处理。