Track-dependent data randomization mitigating false VFO detection
    1.
    发明授权
    Track-dependent data randomization mitigating false VFO detection 有权
    跟踪依赖的数据随机化减轻虚假的VFO检测

    公开(公告)号:US08405925B2

    公开(公告)日:2013-03-26

    申请号:US13149905

    申请日:2011-06-01

    IPC分类号: G11B5/09

    摘要: A method for randomizing data to mitigate false VFO detection is described. In one embodiment, such a method includes simultaneously receiving multiple input data streams. Each input data stream is associated with a different track on a magnetic tape medium. The input data streams are simultaneously scrambled to produce multiple randomized data streams. The input data streams are scrambled such that different bit patterns are produced in the randomized data streams even where corresponding bit patterns in the input data streams are identical. The randomized data streams are simultaneously written to their associated data tracks on the magnetic tape medium. A corresponding apparatus is also described.

    摘要翻译: 描述用于随机化数据以减轻虚假VFO检测的方法。 在一个实施例中,这种方法包括同时接收多个输入数据流。 每个输入数据流与磁带介质上的不同轨道相关联。 输入数据流被同时加扰以产生多个随机数据流。 输入数据流被加扰,使得在随机数据流中产生不同的位模式,即使输入数据流中相应的位模式是相同的。 随机数据流被同时写入到磁带介质上的相关联的数据轨道上。 还描述了相应的装置。

    Tape layout design for reliable ECC decoding
    2.
    发明授权
    Tape layout design for reliable ECC decoding 有权
    磁带布局设计可靠的ECC解码

    公开(公告)号:US08139304B2

    公开(公告)日:2012-03-20

    申请号:US12849720

    申请日:2010-08-03

    IPC分类号: G11B5/09

    摘要: A method for physically laying out data on tape is disclosed herein. In one embodiment, such a method includes receiving a data set, wherein the data set includes S sub data sets (SDSs) of fixed size and each SDS includes N codeword interleaves (CWIs). The method further distributes the CWIs for the S SDSs across T tracks on a physical tape medium such that the distances between CWIs of the same SDS are substantially maximized on the physical tape medium. To maximize the distances, the method periodically rotates the tracks within the data set by a track rotation value R, wherein the number of tracks T is equal to 2k, and the track rotation value R is equal to 2k−1−1. A corresponding apparatus is also disclosed herein.

    摘要翻译: 本文公开了一种在带上物理布置数据的方法。 在一个实施例中,这种方法包括接收数据集,其中数据集包括固定大小的S个子数据集(SDS),并且每个SDS包括N个码字交织(CWI)。 该方法进一步在物理磁带介质上跨T磁道分配用于S SDS的CWI,使得相同SDS上的CWI之间的距离在物理磁带介质上基本上最大化。 为了最大化距离,该方法通过轨道旋转值R周期性地旋转数据集内的轨道,其中轨道数量T等于2k,轨道旋转值R等于2k-1-1。 本文还公开了相应的装置。

    Decoding encoded data containing integrated data and header protection
    3.
    发明授权
    Decoding encoded data containing integrated data and header protection 失效
    对包含集成数据和头部保护的编码数据进行解码

    公开(公告)号:US08762805B2

    公开(公告)日:2014-06-24

    申请号:US12957651

    申请日:2010-12-01

    IPC分类号: G06F11/00

    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)。

    Efficient rewrite technique for tape drives
    6.
    发明授权
    Efficient rewrite technique for tape drives 有权
    磁带驱动器的高效重写技术

    公开(公告)号:US08495470B2

    公开(公告)日:2013-07-23

    申请号:US12849743

    申请日:2010-08-03

    IPC分类号: G11C29/00

    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。

    TAPE LAYOUT DESIGN FOR RELIABLE ECC DECODING
    8.
    发明申请
    TAPE LAYOUT DESIGN FOR RELIABLE ECC DECODING 有权
    用于可靠的ECC解码的卷带布局设计

    公开(公告)号:US20120033321A1

    公开(公告)日:2012-02-09

    申请号:US12849720

    申请日:2010-08-03

    IPC分类号: G11B5/09 H03M13/00

    摘要: A method for physically laying out data on tape is disclosed herein. In one embodiment, such a method includes receiving a data set, wherein the data set includes S sub data sets (SDSs) of fixed size and each SDS includes N codeword interleaves (CWIs). The method further distributes the CWIs for the S SDSs across T tracks on a physical tape medium such that the distances between CWIs of the same SDS are substantially maximized on the physical tape medium. To maximize the distances, the method periodically rotates the tracks within the data set by a track rotation value R, wherein the number of tracks T is equal to 2k, and the track rotation value R is equal to 2k−1−1. A corresponding apparatus is also disclosed herein.

    摘要翻译: 本文公开了一种在带上物理布置数据的方法。 在一个实施例中,这种方法包括接收数据集,其中数据集包括固定大小的S个子数据集(SDS),并且每个SDS包括N个码字交织(CWI)。 该方法进一步在物理磁带介质上跨T磁道分配用于S SDS的CWI,使得相同SDS上的CWI之间的距离在物理磁带介质上基本上最大化。 为了最大化距离,该方法通过轨道旋转值R周期性地旋转数据集内的轨道,其中轨道数量T等于2k,轨道旋转值R等于2k-1-1。 本文还公开了相应的装置。

    REWRITING CODEWORD OBJECTS TO MAGNETIC DATA TAPE UPON DETECTION OF AN ERROR
    9.
    发明申请
    REWRITING CODEWORD OBJECTS TO MAGNETIC DATA TAPE UPON DETECTION OF AN ERROR 有权
    在检测到错误的情况下,将编码对象写入磁性数据带

    公开(公告)号:US20100177420A1

    公开(公告)日:2010-07-15

    申请号:US12351756

    申请日:2009-01-09

    IPC分类号: G11B5/09

    摘要: During a read-after-write operation on magnetic tape, a first SCO is formed which includes two encoded processed user data units and is one of T SCOs in a first SCO set. The user data units are each one of T user data units in first and second user data unit sets, respectively, within the first SCO set. The first SCO set is written to the magnetic tape and is immediately read. When an error is detected in one of the user data units, a second SCO is formed to include the first user data unit and, only if an error is not detected in a user data unit in the other user data unit set, to not include the other user data unit, the second SCO being one of T SCOs in a second SCO set. Then, the second SCO set is rewritten to a later position on the tape later.

    摘要翻译: 在磁带读写操作期间,形成第一SCO,其包括两个经编码的处理的用户数据单元,并且是第一SCO组中的T SCO之一。 用户数据单元分别在第一SCO集合内的第一和第二用户数据单元组中的T个用户数据单元中的每一个。 第一个SCO组写入磁带并立即读取。 当在用户数据单元之一中检测到错误时,形成第二SCO以包括第一用户数据单元,并且仅当在另一个用户数据单元组中的用户数据单元中没有检测到错误时,不包括 另一用户数据单元,第二SCO是第二SCO组中的T SCO之一。 然后,第二个SCO组被重新写入磁带的稍后位置。