DECODING ENCODED DATA CONTAINING INTEGRATED DATA AND HEADER PROTECTION
    21.
    发明申请
    DECODING ENCODED DATA CONTAINING INTEGRATED DATA AND HEADER PROTECTION 失效
    解码包含一体化数据和编码保护的编码数据

    公开(公告)号:US20120144271A1

    公开(公告)日:2012-06-07

    申请号:US12957651

    申请日:2010-12-01

    IPC分类号: G11C29/00

    摘要: A method for decoding encoded data comprising integrated data and header protection is disclosed herein. In one embodiment, such a method includes receiving an extended data array. The extended data array includes a data array organized into rows and columns, headers appended to the rows of the data array, column ECC parity protecting the columns of the data array, and row ECC parity protecting the rows and headers combined. The method then decodes the extended data array. Among other operations, this decoding step includes checking the header associated with each row to determine whether the header is legal. If the header is legal, the method determines the contribution of the header to the corresponding row ECC parity. The method then reverses the contribution of the header to the corresponding row ECC parity. A corresponding apparatus (i.e., a tape drive configured to implement the above-described method) is also disclosed herein.

    摘要翻译: 本文公开了一种用于对包括集成数据和报头保护的编码数据进行解码的方法。 在一个实施例中,这种方法包括接收扩展数据阵列。 扩展数据阵列包括组织成行和列的数据阵列,附加到数据阵列行的标题,保护数据阵列列的ECC ECC奇偶校验和保护行和头组合的行ECC奇偶校验。 该方法然后解码扩展数据数组。 在其他操作中,该解码步骤包括检查与每行关联的标题以确定标题是否合法。 如果标题是合法的,则该方法确定标题对相应行ECC奇偶校验的贡献。 该方法然后将标题的贡献反转到对应的行ECC奇偶校验。 本文还公开了相应的装置(即,被配置为实现上述方法的磁带驱动器)。

    Detecting a periodic sequence of servo signals
    22.
    发明授权
    Detecting a periodic sequence of servo signals 失效
    检测伺服信号的周期性序列

    公开(公告)号:US08139302B2

    公开(公告)日:2012-03-20

    申请号:US12815234

    申请日:2010-06-14

    IPC分类号: G11B5/09

    摘要: A system and method are disclosed for detecting a periodic sequence. A value detector module detects a plurality of values of a periodic sequence. In one embodiment, a transformation module transforms the plurality of values into transformed values. A confinement module confines the values to a limited set of confined values. A correlation module correlates the confined values with a plurality of instances of the periodic sequence. In addition, a selection module selects an instance of the periodic sequence with the highest correlation to the confined values as an observed periodic sequence.

    摘要翻译: 公开了用于检测周期性序列的系统和方法。 值检测器模块检测周期性序列的多个值。 在一个实施例中,变换模块将多个值转换为变换值。 限制模块将值限制为有限的一组限制值。 相关模块将约束值与周期性序列的多个实例相关联。 此外,选择模块选择具有与限定值的最高相关性的周期性序列的实例作为观察到的周期性序列。

    EFFICIENT REWRITE TECHNIQUE FOR TAPE DRIVES
    23.
    发明申请
    EFFICIENT REWRITE TECHNIQUE FOR TAPE DRIVES 有权
    有效的REWRITE技术用于磁带驱动

    公开(公告)号:US20120036318A1

    公开(公告)日:2012-02-09

    申请号:US12849743

    申请日:2010-08-03

    IPC分类号: G06F12/00

    摘要: A method for efficiently rewriting data to tape is disclosed herein. In one embodiment, such a method includes writing a data set to tape, the data set comprising S sub data sets of fixed size, each sub data set comprising N code word interleaves (CWIs). The method further includes reading the data set while writing it to the tape to identify faulty CWIs. While reading the data set, the method buffers the faulty CWIs (such as by storing, identifying, and/or marking the faulty CWIs) for later retrieval. When the end of the data set is reached, the method writes corrected versions of the faulty CWIs to the end of the data set. A corresponding apparatus is also disclosed and claimed herein.

    摘要翻译: 本文公开了一种有效地将数据重写到磁带的方法。 在一个实施例中,这种方法包括将数据集写入磁带,数据组包括固定大小的S个子数据集,每个子​​数据集包括N个码字交织(CWI)。 该方法还包括在将数据集写入磁带时识别数据集以识别故障CWI。 在读取数据集时,该方法缓冲有缺陷的CWI(例如通过存储,识别和/或标记故障的CWI)来稍后检索。 当达到数据集的结尾时,该方法会将故障CWI的修正版本写入数据集的末尾。 本文还公开并要求对应的装置。

    DATA INTERLEAVING IN TAPE DRIVES
    25.
    发明申请
    DATA INTERLEAVING IN TAPE DRIVES 有权
    磁带驱动器中的数据交互

    公开(公告)号:US20100232047A1

    公开(公告)日:2010-09-16

    申请号:US12720711

    申请日:2010-03-10

    IPC分类号: G11B5/09 G06F13/28

    摘要: Methods and apparatus for interleaving data in a multitrack tape drive and for writing data on a multitrack tape in the tape drive. One method includes: partitioning the data into m(2n+k) data blocks, where each data block has a logical array of rows and columns of data bytes; error-correction coding a row and a column of the logical array to produce an encoded block; assigning the coded row to a respective location in a logical interleave array having L rows and 2n+k columns of locations; and writing a sequence of assigned coded rows simultaneously in respective data tracks on the multitrack tape. The coded row is assigned such that the minimum Euclidean distance on the multitrack tape between the coded rows is maximized. The apparatus includes units for performing the methods and the computer program product includes a program code means for causing a computer to perform the methods.

    摘要翻译: 用于在多轨磁带驱动器中交织数据并在磁带驱动器中的多轨磁带上写入数据的方法和装置。 一种方法包括:将数据划分为m(2n + k)个数据块,其中每个数据块具有数据字节的行和列的逻辑阵列; 对逻辑阵列的行和列进行纠错编码以产生编码块; 将编码行分配给具有L行和2n + k列位置的逻辑交错阵列中的相应位置; 以及在多轨磁带上的相应数据轨道中同时写入分配的编码行序列。 分配编码行使得编码行之间的多轨磁带上的最小欧几里得距离最大化。 所述装置包括用于执行所述方法的单元,并且所述计算机程序产品包括用于使计算机执行所述方法的程序代码装置。

    HIGH-RATE RLL ENCODING
    26.
    发明申请
    HIGH-RATE RLL ENCODING 有权
    高速RLL编码

    公开(公告)号:US20090027242A1

    公开(公告)日:2009-01-29

    申请号:US12185095

    申请日:2008-08-03

    IPC分类号: H03M7/00

    摘要: An unencoded m-bit data input sequence is divided into a block of n bits and a block of m-n bits. The block of n bits is divided into a first set of n+1 encoded bits, wherein at least one of P1 subblocks of the first set satisfies a G, M and I constraints. The first set of n+1 encoded bits is mapped into a second set of n+1 encoded bits wherein at least one of P2 subblocks of the second set gives rise to at least Q1 transitions after 1/(1+D2) precoding. A second set of n+1 encoded bits is divided into P3 encoded subblocks and the P3 encoded subblocks are interleaved among (m−n)/s unencoded symbols so as to form a (m+1)-bit output sequence codeword which is then stored on a data storage medium.

    摘要翻译: 未编码的m位数据输入序列被分成n位块和m-n位块。 n位的块被划分为第一组n + 1个编码比特,其中第一组的P1个子块中的至少一个满足G,M和I约束。 第一组n + 1个编码比特被映射到n + 1编码比特的第二组,其中第二组的P2子块中的至少一个在1 /(1 + D2)预编码之后产生至少Q1个转换。 第二组n + 1编码比特被分成P3编码子块,并且P3编码子块在(mn)/ s个未编码符号之间进行交织,以形成第(m + 1)比特的输出序列码字,然后存储在 数据存储介质。

    Data management in solid state storage systems
    28.
    发明授权
    Data management in solid state storage systems 有权
    固态存储系统中的数据管理

    公开(公告)号:US09037951B2

    公开(公告)日:2015-05-19

    申请号:US13516627

    申请日:2010-12-16

    IPC分类号: G06F11/10 G11C29/00

    摘要: Methods and apparatus are provided for controlling data management operations including storage of data in solid state storage of a solid state storage system. Input data is stored in successive groups of data write locations in the solid state storage. Each group comprises a set of write locations in each of a plurality of logical subdivisions of the solid state storage. The input data to be stored in each group is encoded in accordance with first and second linear error correction codes. The encoding is performed by constructing from the input data to be stored in each group a logical array of rows and columns of data symbols. The rows and columns are respectively encoded in accordance with the first and second linear error correction codes to produce an encoded array in which all rows correspond to respective first codewords and columns correspond to respective second codewords.

    摘要翻译: 提供了用于控制数据管理操作的方法和装置,包括固态存储系统的固态存储中的数据的存储。 输入数据存储在固态存储器中的连续的数据写入位置组中。 每个组包括在固态存储器的多个逻辑子部分的每一个中的一组写入位置。 要存储在每个组中的输入数据根据第一和第二线性纠错码进行编码。 通过从输入数据中构成数据符号的行和列的逻辑阵列,来构成编码。 行和列分别根据第一和第二线性纠错码编码以产生编码阵列,其中所有行对应于相应的第一码字和列对应于相应的第二码字。

    Adaptive soft-output detector for magnetic tape read channels
    30.
    发明授权
    Adaptive soft-output detector for magnetic tape read channels 有权
    用于磁带读取通道的自适应软输出检测器

    公开(公告)号:US08797670B2

    公开(公告)日:2014-08-05

    申请号:US13527508

    申请日:2012-06-19

    IPC分类号: G11B5/035 G11B20/10

    摘要: In accordance with one embodiment, a data storage system includes a tape channel for reading precoded data from a magnetic tape medium to produce a signal, a soft detector adapted for calculating first soft information about each bit of the signal and sending the first soft information to a soft decoder, and the soft decoder positioned subsequent to the soft detector, the soft decoder being adapted for calculating second soft information about each bit of the signal and sending the second soft information to the soft detector, wherein the precoded data includes a characteristic of being passed through at least one precoder prior to being written to the magnetic tape medium, and wherein the soft detector provides automatic compensation for the precoded data. Other systems, methods, and computer program products for reading data using an adaptive soft-output detector are described according to more embodiments.

    摘要翻译: 根据一个实施例,数据存储系统包括用于从磁带介质读取预编码数据以产生信号的磁带通道,软检测器,适于计算关于信号的每个位的第一软信息,并将第一软信息发送到 软解码器和位于软检测器之后的软解码器,软解码器适于计算关于信号的每个位的第二软信息,并将第二软信息发送给软检测器,其中预编码数据包括 在写入磁带介质之前通过至少一个预编码器,并且其中软检测器为预编码数据提供自动补偿。 根据更多实施例描述了使用自适应软输出检测器读取数据的其它系统,方法和计算机程序产品。