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公开(公告)号：US20090316773A1
公开(公告)日：2009-12-24
申请号：US12487050
申请日：2009-06-18
IPC分类号： H03K9/04
CPC分类号： G11B5/584
摘要： Methods and apparatus for detecting L-bit sync words occurring at N-bit intervals in PPM-encoded servo pattern read signals read in magnetic tape drives. A soft output detector processes the PPM-encoded servo pattern read signal to produce a series of soft output samples corresponding to respective bits encoded in the servo pattern. A sync word detector then produces block correlation values for respective positions of a sliding L-sample block in the series of soft output samples by (i) calculating at each block position bit correlation values indicating correlation between respective samples and corresponding bits of the sync word and (ii) summing each bit correlation value minus a predetermined function of the corresponding sample value. The sync word detector then detects a sync word at the block position with the maximum block correlation value in an (N+L−1)-sample sequence of the series of soft output samples.
摘要翻译： 用于检测在磁带驱动器中读取的PPM编码的伺服模式读取信号中以N位间隔发生的L位同步字的方法和装置。 软输出检测器处理PPM编码的伺服模式读取信号以产生与伺服模式中编码的各个位对应的一系列软输出样本。 同步字检测器然后通过以下步骤产生一系列软输出样本中的滑动L样本块的相应位置的块相关值：（i）在每个块位置计算指示相应采样和同步字的相应位之间的相关性的位相关值 和（ii）将每个比特相关值减去减去对应样本值的预定函数。 同步字检测器随后在软输出样本序列的（N + L-1） - 采样序列中检测具有最大块相关值的块位置处的同步字。
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公开(公告)号：US07589927B2
公开(公告)日：2009-09-15
申请号：US11215409
申请日：2005-08-30
IPC分类号： G11B5/35
CPC分类号： G11B5/035 , G11B20/10046 , G11B20/10212 , G11B20/1201
摘要： Provided is a read channel incorporated in a storage device to process signals read from a storage medium. The read channel includes an equalizer equalizing input read signals to produce equalizer output signals. A detector senses an adjusted equalizer output signal to determine an output value comprising data represented by the input read signals. An equalizer adaptor receives the output value from the detector to determine a first error signal used to adjust the equalizer operations. A component adjusts the equalizer output signals being transmitted to the detector, wherein the component is adjusted by a second error signal calculated from the output value from the detector, wherein the first and second error signals are different.
摘要翻译： 提供了一种结合在存储装置中以读取从存储介质读取的信号的读通道。 读通道包括均衡器均衡输入读信号以产生均衡器输出信号。 检测器感测调整的均衡器输出信号以确定包括由输入读取信号表示的数据的输出值。 均衡器适配器从检测器接收输出值以确定用于调整均衡器操作的第一误差信号。 一个分量调整正被发送到检测器的均衡器输出信号，其中通过从检测器的输出值计算的第二误差信号调整分量，其中第一和第二误差信号是不同的。
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63.发明授权公开(公告)号：US07522367B2
公开(公告)日：2009-04-21
申请号：US11286553
申请日：2005-11-23
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10074 , G11B20/10175
摘要： Provided is an asynchronous read channel shaped toward generalized partial response characteristics. The read channel is incorporated in a storage device to process signals read from a storage medium. An equalizer receives asynchronous input read signals and shapes the input read signals toward a desired fixed characteristic in an asynchronous time domain. An interpolator transforms the read signal from the equalizer in the asynchronous time domain to a synchronous time domain. A noise whitening filter processes the read signal shaped toward the desired fixed characteristic to produce an output read signal shaped towards a generalized partial response polynomial. A detector receives the read signal shaped towards the generalized partial response polynomial in the synchronous time domain to determine an output value comprising data represented by the input read signals.
摘要翻译： 提供了形成为广义部分响应特性的异步读取通道。 读取通道被结合在存储设备中以处理从存储介质读取的信号。 均衡器接收异步输入读取信号，并将输入读取信号形成为异步时域中期望的固定特性。 内插器将来自异步时域中的均衡器的读信号转换为同步时域。 噪声白化滤波器处理朝向期望的固定特性成形的读取信号，以产生朝向广义部分响应多项式成形的输出读取信号。 检测器接收在同步时域中形成为广义部分响应多项式的读信号，以确定包括由输入读信号表示的数据的输出值。
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公开(公告)号：US20090089645A1
公开(公告)日：2009-04-02
申请号：US12058151
申请日：2008-03-28
IPC分类号： H03M13/00
CPC分类号： G11B20/1833
摘要： Method and apparatus for decoding data in a data storage system. In operation, a detector generates an output bit stream in dependence on a data block received from a storage subsystem of the data storage system. A post processor connected to the detector generates a first error corrected bit stream in dependence on the output bit stream and the data block. An error correction decoder connected to the post processor generates a second error corrected bit stream in dependence on the first error corrected bit stream and also generates a checksum in dependence of the second error corrected bit stream. A feedback path supplies from the error correction decoder to the post processor pinning data indicative of locations of correct bits in the second error corrected bit stream in the event that the checksum is indicative of errors in the second error corrected bit stream and the second error corrected bit stream comprises at least one correct interleave. The post processor regenerates the first error corrected bit stream in dependence on the pinning data received from the error correction decoder.
摘要翻译： 用于在数据存储系统中解码数据的方法和装置。 在操作中，检测器根据从数据存储系统的存储子系统接收的数据块产生输出位流。 连接到检测器的后处理器根据输出比特流和数据块生成第一纠错比特流。 连接到后处理器的纠错解码器根据第一纠错比特流产生第二纠错比特流，并且还根据第二纠错比特流产生校验和。 在校验和指示第二纠错比特流中的错误并且校正的第二错误的情况下，反馈路径从错误校正解码器向后处理器提供钉扎指示第二纠错比特流中的正确比特的位置的数据 位流包括至少一个正确的交错。 后处理器根据从纠错解码器接收到的钉扎数据重新生成第一纠错比特流。
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公开(公告)号：US20090055681A1
公开(公告)日：2009-02-26
申请号：US11843323
申请日：2007-08-22
申请人： Ajay Dholakia , Ilias Iliadis , Robert Haas , Xiaoyu-Yu Hu , Evangelos S. Eleftheriou , Roman A. Pletka
发明人： Ajay Dholakia , Ilias Iliadis , Robert Haas , Xiaoyu-Yu Hu , Evangelos S. Eleftheriou , Roman A. Pletka
IPC分类号： G06F11/20
CPC分类号： G06F11/1076 , G06F2211/1088
摘要： Exemplary embodiments of the present invention comprise a method for the use of an intra-disk redundancy storage protection operation for the scrubbing of a disk. The method comprises initiating a disk scrubbing operation upon each disk of a plurality of disks that are comprised within a storage disk array, issuing a disk scrubbing command for a predetermined segment of the disks that are comprised within the storage disk array at a predetermined time interval, and identifying an unrecoverable segment on a disk. The method further comprises determining if unrecoverable sectors comprised within the unrecoverable segment can be reconstructed, and reconstructing the unrecoverable sectors of the unrecoverable segment and relocating the segment to a spare storage location on the disk in the event that the segment cannot be reconstructed within its original storage location.
摘要翻译： 本发明的示例性实施例包括一种用于擦除盘的盘内冗余存储保护操作的方法。 该方法包括在包含在存储盘阵列内的多个盘的每个盘上启动磁盘擦除操作，以预定的时间间隔为包含在存储盘阵列内的盘的预定段发出磁盘擦除命令 并且识别磁盘上的不可恢复的段。 所述方法还包括确定是否可以重建包含在不可恢复的段内的不可恢复的扇区，以及在该段不能在其原始帧内重建的情况下，重构不可恢复段的不可恢复扇区并将该段重定位到盘上的备用存储位置 存储位置。
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66.发明申请公开(公告)号：US20080259484A1
公开(公告)日：2008-10-23
申请号：US12166136
申请日：2008-07-01
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10046 , G11B20/10055
摘要： A read channel and method using that read channel are disclosed. The read channel comprises an analog to digital converter which asynchronously samples at a fixed rate an analog signal formed by reading a data track, where that data track was written to a data storage medium at a symbol rate and an interpolator interconnected with the analog to digital converter. The read channel further comprises a fractionally-spaced equalizer, where the interpolator provides an interpolated signal to the fractionally-spaced equalizer at an interpolation rate, where that interpolation rate is greater than the symbol rate. The fractionally-spaced equalizer forms a synchronous equalized signal. The read channel further comprises a gain control module interconnected with the fractionally-spaced equalizer, and a sequence detector interconnected with the gain control module.
摘要翻译： 公开了使用该读通道的读通道和方法。 读通道包括模数转换器，其以固定速率异步采样通过读取数据轨道形成的模拟信号，其中数据轨道以符号速率写入数据存储介质，并且与模数转换器互连的内插器 转换器。 读通道还包括分数间隔的均衡器，其中内插器以内插速率向分数间隔的均衡器提供内插信号，其中该内插速率大于符号率。 分数间隔均衡器形成同步均衡信号。 读通道还包括与分数间隔均衡器互连的增益控制模块，以及与增益控制模块互连的序列检测器。
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公开(公告)号：US07436748B2
公开(公告)日：2008-10-14
申请号：US10441344
申请日：2003-05-20
IPC分类号： G11B7/00
CPC分类号： G11B9/14 , B82Y10/00 , G11B9/1418 , G11B20/10 , G11B23/34 , G11B27/19 , G11B2005/0021
摘要： A storage device and a method for operating a storage device. A storage medium for storing data in form of marks is scanned by at least one probe in a scanning mode. A control unit provides a pulsed reading signal for data detecting purposes in said scanning mode. Said storage medium comprises marks for determining a clock of said pulsed signal.
摘要翻译： 一种用于操作存储设备的存储设备和方法。 用于以标记形式存储数据的存储介质由扫描模式中的至少一个探针扫描。 控制单元在所述扫描模式中提供用于数据检测目的的脉冲读取信号。 所述存储介质包括用于确定所述脉冲信号的时钟的标记。
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68.发明授权Using at least one servo channel to provide timing recovery and timing information to data channels 失效使用至少一个伺服通道来向数据通道提供定时恢复和定时信息公开(公告)号：US07433142B2
公开(公告)日：2008-10-07
申请号：US11346391
申请日：2006-02-01
申请人： Nhan Xuan Bui , Giovanni Cherubini , Evangelos S. Eleftheriou , Robert Allen Hutchins , Glen Alan Jaquette , Jens Jelitto , Sedat Oelcer , Mark A. Taylor
发明人： Nhan Xuan Bui , Giovanni Cherubini , Evangelos S. Eleftheriou , Robert Allen Hutchins , Glen Alan Jaquette , Jens Jelitto , Sedat Oelcer , Mark A. Taylor
IPC分类号： G11B5/09
CPC分类号： G11B27/36 , G11B20/10037 , G11B20/10046 , G11B20/10055 , G11B20/10212 , G11B20/10259 , G11B20/1403 , G11B20/1876 , G11B27/10 , G11B2020/10592 , G11B2220/90 , G11B2220/95
摘要： Provided is a read channel, storage drive, and method to process signals read from a storage medium. At least one data channel including an interpolator and equalizer and a servo channel includes an interpolator. A timing recovery function processes a timing error from the interpolator in the servo channel to calculate interpolation timing information used by the interpolator to interpolate a servo channel signal. A path is coupled to the timing recovery function and the interpolator in the at least one data channel to communicate the interpolation timing information to the interpolator in the at least one data channel. The interpolator in the at least one data channel is configured to use the interpolation timing information to interpolate an asynchronous data channel signal.
摘要翻译： 提供了一种用于处理从存储介质读取的信号的读通道，存储驱动器和方法。 包括内插器和均衡器和伺服信道的至少一个数据信道包括内插器。 定时恢复功能处理来自伺服信道中的内插器的定时误差，以计算内插器使用的内插定时信息来内插伺服信道信号。 路径耦合到至少一个数据信道中的定时恢复功能和内插器，以将内插定时信息传送到至少一个数据信道中的内插器。 所述至少一个数据信道中的内插器被配置为使用内插定时信息来内插异步数据信道信号。
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公开(公告)号：US07395482B2
公开(公告)日：2008-07-01
申请号：US10739966
申请日：2003-12-18
申请人： Roy D. Cideciyan , Ajay Dholakia , Evangelos S. Eleftheriou , Richard L. Galbraith , Weldon M. Hanson , Thomas Mittelholzer , Travis R. Oenning
发明人： Roy D. Cideciyan , Ajay Dholakia , Evangelos S. Eleftheriou , Richard L. Galbraith , Weldon M. Hanson , Thomas Mittelholzer , Travis R. Oenning
IPC分类号： H03M13/00
CPC分类号： G11B20/1833
摘要： A data storage system includes an encoder subsystem comprising an error correction code encoder, a modulation encoder, and a precoder, and a decoder subsystem similarly comprising a detector, an inverse precoder, a channel decoder, and an error correction code decoder. The error correction encoder applies an error correction code to the incoming user bit stream, and the modulation encoder applies so-called modulation or constrained coding to the error correction coded bit stream. The precoder applies so-called precoding to the modulation encoded bit stream. However, this precoding is applied to selected portions of the bit stream only. There can also be a permutation step where the bit sequence is permuted after the modulation encoder before precoding is applied by the precoder. The decoder subsystem operates in the inverse manner.
摘要翻译： 数据存储系统包括编码器子系统，包括纠错码编码器，调制编码器和预编码器，以及类似地包括检测器，逆预编码器，调制解码器和纠错码解码器的解码器子系统。 误差校正编码器对输入用户比特流应用纠错码，并且调制编码器将所谓的调制或约束编码应用于纠错编码比特流。 预编码器将所谓的预编码应用于调制编码比特流。 然而，该预编码仅应用于位流的选定部分。 还可以存在一个置换步骤，其中在由预编码器施加预编码之前，该位序列在调制编码器之后被置换。 解码器子系统以相反的方式运行。
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公开(公告)号：US07389468B2
公开(公告)日：2008-06-17
申请号：US10945226
申请日：2004-09-20
申请人： Thomas Albrecht , Theodore Antonakopoulos , Giovanni Cherubini , Ajay Dholakia , Evangelos S. Eleftheriou , Charalampos Pozidis
发明人： Thomas Albrecht , Theodore Antonakopoulos , Giovanni Cherubini , Ajay Dholakia , Evangelos S. Eleftheriou , Charalampos Pozidis
IPC分类号： H03M13/00
CPC分类号： G06F11/1076 , B82Y10/00 , G06F2211/1042 , G11B9/14 , G11B9/1445 , G11B20/18
摘要： Methods and apparatus are provided for controlling writing and reading of data in an array of A storage fields of a probe-based data storage device in which data is written to and read from the array of storage fields by a corresponding array of probes. One method provides error-tolerance by exploiting the inherent parallelism of the probe storage array. A user data block to be written to the A-field array is first coded to produce a plurality of C-byte codewords, such that r.C=k1.A where r is the number of codewords and k1 is an integer≧1. A sub-blocks of k1 bytes are produced from the codewords by selecting successive bytes of each sub-block cyclically from the r codewords. The A sub-blocks are then written via respective probes to the corresponding storage fields of the storage field array.
摘要翻译： 提供了用于控制在基于探针的数据存储设备的A个存储区域阵列中的数据的写入和读取的方法和装置，其中通过相应的探针阵列将数据写入存储区阵列并从存储区域读取数据。 一种方法通过利用探针存储阵列的固有并行性来提供容错性。 要写入A场阵列的用户数据块首先被编码以产生多个C字节码字，使得r C = k 1 A其中r是码字数，k <1> 是整数> = 1。 通过从r个码字周期性地选择每个子块的连续字节，从码字产生k 1个字节的子块。 然后通过相应的探针将A个子块写入存储字段阵列的对应存储字段。
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