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公开(公告)号：US11967342B2
公开(公告)日：2024-04-23
申请号：US17944744
申请日：2022-09-14
CPC分类号： G11B20/1813 , G11B20/1037 , G11B2020/1836 , G11B2020/1843
摘要： Mechanisms are provided to receive encoded header information stored on a tape of a tape drive, wherein the encoded header information has been generated by: generating, for a plurality of tracks of the tape of the tape drive, a header information in a plurality of symbols, wherein the plurality of symbols is comprised of a first set of symbols and a second set of symbols, wherein the first set of symbols include identical information across all tracks of the plurality of tracks, and wherein the second set of symbols are configurable to include different information across all tracks of the plurality of tracks; and modifying, for writing to the tape of the tape drive, the first set of symbols of the plurality of tracks to include parity information corresponding to information included in the second set of symbols of the plurality of tracks. The received encoded header information is decoded.
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公开(公告)号：US20240087605A1
公开(公告)日：2024-03-14
申请号：US17944737
申请日：2022-09-14
IPC分类号： G11B20/18
CPC分类号： G11B20/1833 , G11B20/1813 , G11B2020/1836 , G11B2020/1843
摘要： Provided are a method, system, and computer program product in which mechanisms are provided to generate, for a plurality of tracks of a tape of a tape drive, a header information in a plurality of symbols, wherein the plurality of symbols is comprised of a first set of symbols and a second set of symbols, wherein the first set of symbols include identical information across all tracks of the plurality of tracks, and wherein the second set of symbols are configurable to include different information across all tracks of the plurality of track. A modification is made, for writing to the tape of the tape drive, of the first set of symbols of the plurality of tracks to include parity information corresponding to information included in the second set of symbols of the plurality of tracks.
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公开(公告)号：US09633690B2
公开(公告)日：2017-04-25
申请号：US14930636
申请日：2015-11-02
CPC分类号： G11B20/1833 , G11B20/10009 , G11B2020/1843 , G11B2020/185
摘要： In one embodiment, a system for cycle-slip resilient iterative read channel operation includes a processor and logic integrated with and/or executable by the processor. The logic is configured to, in an iterative process until a maximum number of iterations has been reached or a valid codeword is produced, execute cycle-slip detection on signal samples to detect one or more cycle-slip events. Also, the logic is configured to selectively alter a timing estimate driving a phase-locked loop (PLL) during any time interval determined to experience a cycle slip in a first pass as indicated by one or more cycle-slip pointers. Additionally, the logic is configured to generate a set of decisions provided by a detector and generate a set of decisions provided by a decoder. Moreover, the logic is configured to output decoding information relating to the signal samples in response to a decoding algorithm producing a valid codeword.
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公开(公告)号：US20150043102A1
公开(公告)日：2015-02-12
申请号：US14521326
申请日：2014-10-22
CPC分类号： G06F11/1004 , G06F3/0619 , G06F3/064 , G06F3/0682 , G11B5/00813 , G11B20/1202 , G11B20/1833 , G11B2020/1843
摘要： A two part process is used for modifying records to be written and retrieved from tape devices. A record is appended with a cyclic redundancy check and a string of zeros. Submitting the entire record to tape drives which are logical block protection enabled will result in no change. For drives that are not LBP enabled, the string of zeros at the end of the record is removed. In addition to determining whether a drive is LBP compliant, a determination may be made as to whether a drive is a linear tape open drive from a particular manufacturer. Linear tape open drives may behave similarly as drives which may not be enabled with logical block protection.
摘要翻译： 用于修改要从磁带设备写入和检索的记录的两部分过程。 一个记录附加一个循环冗余校验和一串零。 将整个记录提交到启用了逻辑块保护的磁带驱动器将导致无变化。 对于不启用LBP的驱动器，删除记录末尾的零字符串。 除了确定驱动器是否符合LBP之外，还可以确定驱动器是否是来自特定制造商的线性磁带打开驱动器。 线性磁带打开驱动器可能与可能未启用逻辑块保护的驱动器类似。
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公开(公告)号：US20140268393A1
公开(公告)日：2014-09-18
申请号：US13831751
申请日：2013-03-15
IPC分类号： G11B20/12
CPC分类号： G06F11/1004 , G06F3/0619 , G06F3/064 , G06F3/0682 , G11B5/00813 , G11B20/1202 , G11B20/1833 , G11B2020/1843
摘要： A two part process is used for modifying records to be written and retrieved from tape devices. A record is appended with a cyclic redundancy check and a string of zeros. Submitting the entire record to tape drives which are logical block protection enabled will result in no change. For drives that are not LBP enabled, the string of zeros at the end of the record is removed. In addition to determining whether a drive is LBP compliant, a determination may be made as to whether a drive is a linear tape open drive from a particular manufacturer. Linear tape open drives may behave similarly as drives which may not be enabled with logical block protection.
摘要翻译： 用于修改要从磁带设备写入和检索的记录的两部分过程。 一个记录附加一个循环冗余校验和一串零。 将整个记录提交到启用了逻辑块保护的磁带驱动器将导致无变化。 对于不启用LBP的驱动器，删除记录末尾的零字符串。 除了确定驱动器是否符合LBP之外，还可以确定驱动器是否是来自特定制造商的线性磁带打开驱动器。 线性磁带打开驱动器可能与可能未启用逻辑块保护的驱动器类似。
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公开(公告)号：US08516332B1
公开(公告)日：2013-08-20
申请号：US13608390
申请日：2012-09-10
申请人： Gregory Burd , Zining Wu
发明人： Gregory Burd , Zining Wu
IPC分类号： H03M13/11
CPC分类号： G11B20/1833 , G11B2020/1836 , G11B2020/1843 , G11B2020/1853 , G11B2020/1859 , G11B2020/1863 , G11B2220/2516
摘要： Circuits, architectures, methods and algorithms for joint channel-code decoding of linear block codes, and more particularly, for identifying and correcting one or more errors in a code word and/or for encoding CRC (or parity) information. In one aspect, the invention focuses on use of (i) remainders, syndromes or other polynomials and (ii) Gaussian elimination to determine and correct errors. Although this approach may be suboptimal, the present error checking and/or detection scheme involves simpler computations and/or manipulations than conventional schemes, and is generally easier to implement logically. Since the complexity of parity-based error correction schemes increases disproportionately to the number of potential error events, the present invention meets a long-felt need for a scheme to manage error detection and/or correction in systems (such as magnetic recording applications) where there may be a relatively large number of likely error events, thereby advantageously improving reliability and/or performance in channel communications.
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公开(公告)号：US08335048B2
公开(公告)日：2012-12-18
申请号：US12890843
申请日：2010-09-27
申请人： Sung Joong Yun , Sang-Tae Kim
发明人： Sung Joong Yun , Sang-Tae Kim
CPC分类号： G11B20/1883 , G11B20/1816 , G11B2020/1843 , G11B2220/2516
摘要： A method of managing a defect of a hard disk drive includes calculating a number of ECC symbols of every sector which becomes an object of a defect scan and setting a defect reference value based on results of the calculation. The hard disk drive sets a sector as a defect sector having the number of ECC symbols greater than a set defect reference value.
摘要翻译： 管理硬盘驱动器的缺陷的方法包括：计算成为缺陷扫描对象的每个扇区的ECC符号的数量，并且基于计算结果设置缺陷参考值。 硬盘驱动器将扇区设置为具有大于设置的缺陷参考值的ECC符号数的缺陷扇区。
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8.发明授权公开(公告)号：US08284512B2
公开(公告)日：2012-10-09
申请号：US11889168
申请日：2007-08-09
申请人： Koichi Sugiyama , Etsurou Sakamoto
发明人： Koichi Sugiyama , Etsurou Sakamoto
IPC分类号： G11B15/18
CPC分类号： H04N5/91 , G11B20/00086 , G11B20/00094 , G11B20/00166 , G11B20/00688 , G11B20/0071 , G11B20/00724 , G11B20/00746 , G11B20/00753 , G11B20/00768 , G11B20/00797 , G11B20/00862 , G11B20/00876 , G11B20/1201 , G11B23/28 , G11B27/032 , G11B27/107 , G11B27/11 , G11B2020/10537 , G11B2020/1843 , G11B2220/90 , H04N5/765 , H04N5/913 , H04N21/235 , H04N21/2541 , H04N21/4135 , H04N21/4325 , H04N21/4334 , H04N21/435 , H04N21/43622 , H04N21/4627 , H04N21/835 , H04N21/8355 , H04N2005/91314 , H04N2005/91321 , H04N2005/91328 , H04N2005/91364
摘要： Copying, dubbing or reproducing copyrighted digital data can be inhibited or restricted to properly protect a copyright. AV data recorded on a pre-recorded tape is output from a reproducing unit of a first digital VCR with protective information indicating whether the copy of the AV data is inhibited or not. The protective information is input with the A/V data to a second digital VCR. Copy permission information of a blank tape loaded in the second digital VCR is discriminated and the second digital VCR records the AV data supplied from the first digital VCR based on the protective information and the copy permission information.
摘要翻译： 可以禁止或限制复制，复制或复制受版权保护的数字数据，以正确保护版权。 记录在预录带上的AV数据从第一数字VCR的再现单元输出，具有指示AV数据的副本是否被禁止的保护信息。 保护信息用A / V数据输入到第二数字VCR。 鉴别装载在第二数字VCR中的空白磁带的复制许可信息，并且第二数字VCR基于保护信息和复制许可信息记录从第一数字VCR提供的AV数据。
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公开(公告)号：US08266499B2
公开(公告)日：2012-09-11
申请号：US12473885
申请日：2009-05-28
申请人： Bradford C. Lincoln
发明人： Bradford C. Lincoln
IPC分类号： H03M13/00
CPC分类号： G11B20/1833 , G11B2020/1843 , G11B2220/2516 , G11B2220/415
摘要： An XOR unit is provided in a hard disk controller for calculating an XOR of two operands stored in a buffer memory. The XOR unit includes an XOR calculator for calculating the XOR of the operands and a CRC of the XOR resulting from the calculation. An XOR buffer is also included in the XOR unit for storing the XOR result and the CRC of the XOR result, and a CRC calculator for calculating a CRC of the XOR result stored in the XOR buffer. The CRC calculated by the CRC calculator is compared with the CRC of the XOR result stored in the CRC buffer to determine whether the XOR result has been corrupted in the XOR buffer. The XOR result stored in the XOR buffer is determined to be corrupted if the CRC calculated by the CRC calculator and the CRC stored in the XOR buffer do not match.
摘要翻译： 在硬盘控制器中提供XOR单元，用于计算存储在缓冲存储器中的两个操作数的异或。 XOR单元包括用于计算操作数的异或的XOR计算器和由计算产生的XOR的CRC。 异或缓冲器也包含在XOR单元中，用于存储XOR结果和XOR结果的CRC，以及用于计算存储在XOR缓冲器中的XOR结果的CRC的CRC计算器。 将由CRC计算器计算出的CRC与存储在CRC缓冲器中的XOR结果的CRC进行比较，以确定异或结果是否在XOR缓冲器中被破坏。 如果由CRC计算器计算的CRC和存储在XOR缓冲区中的CRC不匹配，则XOR缓冲区中存储的XOR结果被确定为已损坏。
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公开(公告)号：US08086938B2
公开(公告)日：2011-12-27
申请号：US11960555
申请日：2007-12-19
申请人： Pao-Ching Tseng , Shu-Fang Tsai , Chuan Liu
发明人： Pao-Ching Tseng , Shu-Fang Tsai , Chuan Liu
CPC分类号： H04L1/0061 , G06F11/1004 , G11B20/18 , G11B2020/1843 , G11B2220/2516 , H04L1/18
摘要： A method for processing noise interference in a serial AT Attachment (SATA) interface. The method includes the steps of detecting whether there is an error in CRC (Cyclic Redundancy Check) checksum or whether an R_ERR primitive (reception error primitive) is received, detecting whether a FIS (Frame Information Structure) is a data type if there is any error and returning back to error state detecting step if there is no any error, detecting whether the FIS is a ATAPI packet command CDB (Command Descriptor Block) when the FIS is the data format, and writing a special tag to the CDB and returning back to the error detecting step.
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