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1. 发明授权

US5442491A Synchronizing data tracks using global force windows and track sync counters in a multitrack tape device 失效
标题翻译：使用全局强制窗口同步数据轨道，并在多轨磁带设备中跟踪同步计数器
公开(公告)号：US5442491A
公开(公告)日：1995-08-15
申请号：US274515
申请日：1994-07-13
申请人： Charles E. Bailey , Steven R. Bentley , Sushama M. Paranjape , Fernando Quintana , Stephen C. West
发明人： Charles E. Bailey , Steven R. Bentley , Sushama M. Paranjape , Fernando Quintana , Stephen C. West
IPC分类号： G11B5/008 , G11B20/12 , G11B20/18 , G11B20/20 , G11B27/10 , G11B27/30 , G11B5/00
CPC分类号： G11B27/10 , G11B20/1205 , G11B20/1866 , G11B20/20 , G11B27/3027 , G11B5/0083 , G11B2020/10592 , G11B2220/90
摘要： A method and apparatus which first calculates track to track skew in a tape device and then uses the results of that calculation to adjust the windows for detection of sync and resync characters. The system makes use of global circuitry which adjusts the sync and resync windows for all tracks based upon the skew calculation. In the case of the windows used for detecting resyncs, when skew is determined to be large, the global resync window must span a larger time period to account for the skew in detecting resync marks. Conversely, when there is little or no skew present, the windows for resync detection can be narrowed. Normally, the track logic utilizes its own local windows to detect resyncs. If a track misses a resync, however, it must use the global resync window to determine the next resync location. Once the tracks are resynchronized, control can return to local track circuitry to maintain synchronization. In the case of force windows used for detecting the syncs after a resync alignment burst, the skew calculation is used to determine the correct sync location for each particular track. Further, data alignment is maintained in the multitrack environment through the use of a deinterleaving circuit which receives misalignment indications and, in response, makes address corrections to data bytes and pointer bytes.
摘要翻译：首先计算磁带设备中跟踪偏斜的方法和装置，然后使用该计算的结果来调整用于检测同步和再同步字符的窗口。该系统利用全局电路，根据偏斜计算调整所有轨道的同步和再同步窗口。在用于检测重新同步的窗口的情况下，当确定歪斜大时，全局重新同步窗口必须跨越较大的时间段，以解决检测重新同步标记中的偏斜。相反，当存在很少或没有偏移时，可以缩小用于重新同步检测的窗口。通常，轨道逻辑利用自己的本地窗口来检测重新同步。但是，如果某个轨道未通过重新同步，则必须使用全局重新同步窗口来确定下一个重新同步位置。一旦轨道重新同步，控制可以返回到本地轨道电路以保持同步。在用于在重新同步对准突发之后检测同步的强制窗口的情况下，使用偏斜计算来确定每个特定轨道的正确的同步位置。此外，通过使用接收未对准指示的解交织电路，在多轨环境中保持数据对准，并且作为响应，对数据字节和指针字节进行地址校正。

2. 发明授权

US5357380A Method and apparatus for indicating when each track is in burst in a multitrack tape device 失效
标题翻译：用于指示每个轨道何时在多轨磁带设备中突发的方法和装置
公开(公告)号：US5357380A
公开(公告)日：1994-10-18
申请号：US77477
申请日：1993-06-14
申请人： Charles E. Bailey , Steven R. Bentley , Sushama M. Paranjape , Fernando Quintana , Stephen C. West
发明人： Charles E. Bailey , Steven R. Bentley , Sushama M. Paranjape , Fernando Quintana , Stephen C. West
IPC分类号： G11B5/008 , G11B20/12 , G11B20/18 , G11B20/20 , G11B27/10 , G11B27/30 , G11B5/09
CPC分类号： G11B27/10 , G11B20/1205 , G11B20/1866 , G11B20/20 , G11B27/3027 , G11B5/0083 , G11B2020/10592 , G11B2220/90
摘要： A method and apparatus which first calculates track to track skew in a tape device and then uses the results of that calculation to adjust the windows for detection of sync and resync characters. The system makes use of global circuitry which adjusts the sync and resync windows for all tracks based upon the skew calculation. In the case of the windows used for detecting resyncs, when skew is determined to be large, the global resync window must span a larger time period to account for the skew in detecting resync marks. Conversely, when there is little or no skew present, the windows for resync detection can be narrowed. Normally, the track logic utilizes its own local windows to detect resyncs. If a track misses a resync, however, it must use the global resync window to determined the next resync location. Once the tracks are resynchronized, control can return to local track circuitry to maintain synchronization. In the case of force windows used for detecting the syncs after a resync alignment burst, the skew calculation is used to determine the correct sync location for each particular track. Further, data alignment is maintained in the multitrack environment through the use of a deinterleaving circuit which receives misalignment indications and, in response, makes address corrections to data bytes and pointer bytes.
摘要翻译：首先计算磁带设备中跟踪偏斜的方法和装置，然后使用该计算的结果来调整用于检测同步和再同步字符的窗口。该系统利用全局电路，根据偏斜计算调整所有轨道的同步和再同步窗口。在用于检测重新同步的窗口的情况下，当确定歪斜大时，全局重新同步窗口必须跨越较大的时间段，以解决检测重新同步标记中的偏斜。相反，当存在很少或没有偏移时，可以缩小用于重新同步检测的窗口。通常，轨道逻辑利用自己的本地窗口来检测重新同步。但是，如果一个轨道错过重新同步，则必须使用全局重新同步窗口来确定下一个重新同步位置。一旦轨道重新同步，控制可以返回到本地轨道电路以保持同步。在用于在重新同步对准突发之后检测同步的强制窗口的情况下，使用偏斜计算来确定每个特定轨道的正确的同步位置。此外，通过使用接收未对准指示的解交织电路，在多轨环境中保持数据对准，并且作为响应，对数据字节和指针字节进行地址校正。

3. 发明授权

US5373401A Data storage system having multimodal interblock gap detection utilizing a predicted occurance time window 失效
标题翻译：数据存储系统具有利用预测发生时间窗的多模块间块间隙检测
公开(公告)号：US5373401A
公开(公告)日：1994-12-13
申请号：US79028
申请日：1993-06-18
申请人： Steven R. Bentley , Sushama M. Paranjape , Fernando Quintana , Stephen C. West
发明人： Steven R. Bentley , Sushama M. Paranjape , Fernando Quintana , Stephen C. West
IPC分类号： G11B20/10 , G11B20/12 , G11B27/30 , G11B5/09
CPC分类号： G11B20/12 , G11B27/3027 , G11B20/1201
摘要： A method and system for accurately reading and storing data as multiple data blocks on a removable data storage medium mounted within a data storage system. Each data block includes an initial acquisition data character and multiple diverse synchronization characters/bursts and adjacent data blocks are separated by a unique interblock gap character. A multimodal interblock gap character detection circuit is provided which may operate in a normal mode of operation or a stringent mode of operation, wherein an enhanced degree of certainty is required for detection of the interblock gap character. A predicted time window of occurrence for a next interblock gap character is generated in response to detection of an initial acquisition data character and at least one synchronization character within a data block. Additionally, a global clock count signal based upon multiple track outputs is generated each time a resynchronization burst is encountered. The multimodal interblock gap character detection circuit is then automatically switched from the stringent mode of operation to the normal mode of operation during the predicted time window, minimizing the possibility of erroneous interblock gap character detection during data block processing. In data blocks which are sufficiently large to utilize multiple unique end of block synchronization characters, the occurrence of each successive end of block synchronization character may be utilized to redefine the predicted time window with greater accuracy. Expiration of a predicted time window or the occurrence of a global clock count signal during an open predicted time window may then be utilized to generate a presumption of the occurrence of an interblock gap character; however, actual detection of the interblock gap character will override the prediction circuitry.
摘要翻译：一种用于在安装在数据存储系统中的可移动数据存储介质上将数据准确地读取和存储为多个数据块的方法和系统。每个数据块包括初始采集数据字符，并且多个不同的同步字符/突发和相邻的数据块由唯一的间隔间隔字符隔开。提供了一种多模式间块间隙字符检测电路，其可以在正常操作模式或严格的操作模式下操作，其中需要增强的确定性程度来检测帧间间隔字符。响应于初始获取数据字符的检测和数据块内的至少一个同步字符的检测，生成下一个块间间隔字符的预测出现时间窗口。此外，每次遇到重新同步突发时，都会产生基于多个磁道输出的全局时钟计数信号。然后，在预测时间窗口期间，多模块间间隔字符检测电路自动地从严格的操作模式切换到正常操作模式，从而最小化在数据块处理期间错误的块间间隙字符检测的可能性。在足够大以利用块同步字符的多个唯一结尾的数据块中，可以利用块同步字符的每个连续结束的出现以更高的精度来重新定义预测的时间窗。然后可以利用在开放预测时间窗口中的预测时间窗口的过期或全局时钟计数信号的出现来产生间隔间隔字符出现的推定; 然而，间隔间隙字符的实际检测将覆盖预测电路。

4. 发明授权

US5408366A Apparatus and method for detecting and validating formatted blocks on magnetic tape 失效
标题翻译：用于检测和验证磁带上的格式化块的装置和方法
公开(公告)号：US5408366A
公开(公告)日：1995-04-18
申请号：US77162
申请日：1993-06-14
申请人： Steven R. Bentley , Rickey W. Murray , Sushama M. Paranjape , Fernando Quintana
发明人： Steven R. Bentley , Rickey W. Murray , Sushama M. Paranjape , Fernando Quintana
IPC分类号： G11B5/09 , G11B15/04 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/36
CPC分类号： G11B20/1205 , G11B15/04 , G11B20/1879 , G11B27/36 , G11B2020/183
摘要： An apparatus and method for detecting and validating formatted blocks during read/write data operations in a magnetic tape data storage system includes component functionality for reading and writing data on a magnetic tape medium in a plurality of modes, including a read-only (R) mode and a read-while-write (RWW) mode, the data being arranged in one or more tracks in a sequence of formatted blocks. In preferred embodiments, formatted block detection and validation is performed by appropriate logic circuitry configured to detect at least one formatting entity representing an inter-block gap, a block acquisition burst, a synchronization character, or any other desired formatting entity, using first and second programmable detection thresholds that are the same or substantially the same in both the R and RWW modes. In addition, a validation determination is made in the RWW mode whether detection of the formatting entity satisfies an RWW error threshold that is greater than either of the first and second programmable detection thresholds. If the RWW error threshold is not satisfied, a message is generated indicating that a write retry may be required. In this way, the detection of various formatting entities is achieved uniformly during the R and RWW modes but provision is also made for applying a more stringent threshold criteria during the RWW mode for write validation.
摘要翻译：一种用于在磁带数据存储系统中读/写数据操作期间检测和验证格式化块的装置和方法包括用于以多种模式在磁带介质上读取和写入数据的组件功能，包括只读（R）模式和读写同时（RWW）模式，数据被布置在格式化块的序列中的一个或多个轨道中。在优选实施例中，格式化块检测和验证由适当的逻辑电路执行，该逻辑电路经配置以使用第一和第二检测器来检测表示块间间隔，块获取脉冲串，同步字符或任何其它期望格式化实体的至少一个格式化实体可编程检测阈值在R和RWW模式中都相同或基本相同。此外，在RWW模式中进行有效确定，无论格式化实体的检测是否满足大于第一和第二可编程检测阈值中的任一个的RWW误差阈值。如果RWW错误阈值不满足，则生成指示可能需要写入重试的消息。以这种方式，在R和RWW模式期间均衡地实现各种格式化实体的检测，但是还提供了在用于写入验证的RWW模式期间应用更严格的阈值准则。

5. 发明授权

US5369652A Error detection and correction having one data format recordable on record media using a diverse number of concurrently recorded tracks 失效
标题翻译：错误检测和校正具有一个数据格式，可在记录介质上使用不同数量的同时记录的轨道进行记录
公开(公告)号：US5369652A
公开(公告)日：1994-11-29
申请号：US75944
申请日：1993-06-14
申请人： Charles E. Bailey , Ernest S. Gale , Carl A. Hassell , Scott J. Schaffer , Sushama M. Paranjape , Stephen C. West
发明人： Charles E. Bailey , Ernest S. Gale , Carl A. Hassell , Scott J. Schaffer , Sushama M. Paranjape , Stephen C. West
IPC分类号： G06F11/10 , G11B20/18 , H03M13/29 , H03M13/00 , G11B5/09
CPC分类号： G06F11/1076 , G06F11/1008 , G11B20/1833 , G11B20/1866 , H03M13/1515 , H03M13/29 , H03M13/2903 , H03M13/2909 , H03M13/2918
摘要： A data storage system has error detecting and correcting system having three error codes. The data are arranged logically as a three-dimensional array consisting of a plurality of logically rectangular blocks of data. Each block of data has columns and rows of data. A first error code that corrects errors creates a first redundancy in each of the columns. A like-positioned block row of data in each of the blocks constitutes an array row of data. The array rows are grouped into sets of array rows, the number of array rows in each set vary inversely with a number of tracks of a record medium that concurrently receive the data for recording. Each set of data are recorded serially by bit in respective tracks of the tape record medium. Before recording, the block rows are logically rotated (end-around shifted) within each of the array rows. The block row shifting is different for each set such that the lateral alignment of data are changed for avoiding medium defects extending transversely of the tracks from creating excessive errors in any column of data. After the block row shifting, a second error code is applied to each block row while a third error code is applied to each array row. Readback is a reversal of the writing process. Error pointers are generated from the second and third redundancies as well as from signal and data format errors.
摘要翻译：数据存储系统具有具有三个错误代码的错误检测和校正系统。数据被逻辑地布置为由多个逻辑上矩形的数据块组成的三维阵列。每个数据块都有列和数据行。纠正错误的第一个错误代码会在每个列中创建第一个冗余。每个块中的相同位置的块行数据构成数组数据行。阵列行被分组成数组行，每组中的数组行的数目与同时接收用于记录的数据的记录介质的数量的磁道数成反比。每一组数据在磁带记录介质的相应磁迹中逐位记录。在记录之前，块行在每个数组行内被逻辑旋转（终止位移）。对于每组，块行移位是不同的，使得数据的横向对准被改变以避免在轨道横向延伸的介质缺陷，从而在任何数据列中产生过多的错误。在块行移位之后，将第二个错误代码应用于每个块行，同时将第三个错误代码应用于每个数组行。回读是写作过程的逆转。从第二和第三冗余以及信号和数据格式错误产生错误指针。

6. 发明授权

US5475542A Method and apparatus for improving inter-block gap length tolerance and locate accuracy for write appends 失效
标题翻译：用于改善块间间隙长度公差的方法和装置，并定位写入附件的精度
公开(公告)号：US5475542A
公开(公告)日：1995-12-12
申请号：US275917
申请日：1994-07-18
申请人： Steven R. Bentley , Alex Chliwnyj , Steven D. Johnson , Sushama M. Paranjape , Ronald K. Rhodes
发明人： Steven R. Bentley , Alex Chliwnyj , Steven D. Johnson , Sushama M. Paranjape , Ronald K. Rhodes
IPC分类号： G11B5/09 , G11B15/087 , G11B15/52 , G11B15/54 , G11B15/48
CPC分类号： G11B5/09 , G11B15/087 , G11B15/52 , G11B15/54
摘要： A method and apparatus for accurately locating targeted append points in a tape drive. The effects of interlayer slip (ILS) are eliminated and smaller IBGs are possible thus providing increased data capacity for a given tape cartridge. A coarse tachometer count is used in combination with the read dataflow to accurately locate the proper append point even with a small IBG size. The appended data are assured to be written using the proper tape velocity which virtually eliminates improper write appends and read temporary errors previously caused by ILS effects. The solution also guarantees that customer data previously written to the tape are not accidentally overwritten.
摘要翻译：一种用于在磁带驱动器中精确定位目标附加点的方法和装置。消除了层间滑移（ILS）的影响，并且可以使用较小的IBG，从而为给定的带盒提供增加的数据容量。与读取的数据流结合使用粗调速计数，即使使用小的IBG尺寸来精确定位适当的附加点。使用适当的磁带速度确保附加数据的写入，实际上消除了不正确的写入附加和读取以前由ILS效应造成的临时错误。该解决方案还保证以前写入磁带的客户数据不会被意外覆盖。

7. 发明授权

US5485476A Method and system for error tolerant synchronization character detection in a data storage system 失效
标题翻译：数据存储系统中容错同步字符检测的方法和系统
公开(公告)号：US5485476A
公开(公告)日：1996-01-16
申请号：US77176
申请日：1993-06-14
申请人： Sushama M. Paranjape , Fernando Quintana
发明人： Sushama M. Paranjape , Fernando Quintana
IPC分类号： G06F11/08 , G11B20/10 , G11B20/12 , G11B27/30 , H03M13/00 , G06F11/00 , H04L12/00
CPC分类号： G11B27/3027 , G11B20/1205
摘要： An error tolerant detection of multibit synchronization characters within data blocks in a data storage system. Each detected prospective multibit synchronization character is compared to an expected multibit synchronization character for an identical match and for a match which includes a variation of no greater than two adjacent bits. A synchronization character is then considered to be identified in response to a successful exact comparison or, if relaxed detection is enabled, in response to a successful comparison indicating that the detected prospective multibit synchronization character does not differ from the expected multibit synchronization character by an error greater than two adjacent bits. For Read While Write operation in which it is imperative that the synchronization characters be written initially without error, the relaxed detection scheme may be selectively disabled, requiring the synchronization characters to achieve an exact match with the expected synchronization character.
摘要翻译：数据存储系统中数据块内的多位同步字符的容错检测。将每个检测到的预期多位同步字符与用于相同匹配的预期多位同步字符以及包括不大于两个相邻位的变化的匹配进行比较。然后考虑到成功的精确比较来识别同步字符，或者如果允许轻松检测，则响应于成功比较，指示检测到的预期多位同步字符与预期的多位同步字符不同于错误大于两个相邻位。对于读写操作，其中必须首先写入同步字符而不发生错误，可以选择性地禁用松弛检测方案，要求同步字符与期望的同步字符完全匹配。

8. 发明授权

US5363252A Method and system for track skew tolerant acquistion burst sequence validation in a data storage system 失效
标题翻译：用于数据存储系统中的磁道偏斜容错采集突发序列验证的方法和系统
公开(公告)号：US5363252A
公开(公告)日：1994-11-08
申请号：US85518
申请日：1993-06-30
申请人： Steven R. Bentley , Sushama M. Paranjape , Rickey W. Murray
发明人： Steven R. Bentley , Sushama M. Paranjape , Rickey W. Murray
IPC分类号： G11B20/12 , G11B20/14 , G11B20/20 , G11B5/09
CPC分类号： G11B20/1403 , G11B20/20
摘要： A method and system for detecting and validating multibit acquisition burst sequences which precede and follow each data block in a multitrack data storage system. An acquisition sequence pattern detection circuit is utilized to provide an indication of acquisition burst sequence detection in response to an occurrence of an accurate sequence of a selected number of acquisition burst sequence bits. A latch is utilized to store the pattern criteria indication for each associated track and the latch outputs are then combined in a logic circuit to provide a composite burst pattern error indication signal. An acquisition burst sequence quality detection circuit is also utilized to provide a quality criteria indication for each track in response to an occurrence of an accurate sequence of a larger number of acquisition burst sequence bits than is normally required for acquisition which ensures that subsequent detection of the acquisition burst sequence will be successful, despite increased skew among the multiple tracks. An occurrence of an acquisition burst sequence is then validated during selected modes of operation only in response to a detection of an acquisition burst sequence and an indication of sufficient quality of the acquisition burst sequence within a predetermined number of tracks.
摘要翻译：一种在多轨数据存储系统中检测和验证在每个数据块之前和之后的多位获取突发序列的方法和系统。采集序列模式检测电路用于响应于选定数量的采集脉冲串序列位的精确序列的出现而提供采集脉冲串序列检测的指示。锁存器用于存储每个相关轨道的模式标准指示，然后将锁存器输出组合在逻辑电路中以提供复合脉冲串模式错误指示信号。还采用获取突发序列质量检测电路来响应于比采集通常需要的更大数量的采集突发序列位的精确序列的出现，为每个轨道提供质量标准指示，其确保随后检测到尽管多个轨道之间的偏斜增加，采集突发序列将成功。然后，在所选择的操作模式期间，仅在采集脉冲串序列的检测和在预定数目的磁道内的采集脉冲串序列的足够质量的指示的情况下验证采集脉冲串序列的出现。

9. 发明授权

US5386324A Apparatus and method for anticipated error recovery using debris profiles 失效
标题翻译：使用碎片轮廓预测误差恢复的装置和方法
公开(公告)号：US5386324A
公开(公告)日：1995-01-31
申请号：US99974
申请日：1993-07-30
申请人： Scott M. Fry , Pamela R. Nylander-Hill , Sushama M. Paranjape
发明人： Scott M. Fry , Pamela R. Nylander-Hill , Sushama M. Paranjape
IPC分类号： G11B20/12 , G11B15/02 , G11B20/18 , G11B23/50 , G11B27/36 , G11B5/09
CPC分类号： G11B15/026 , G11B20/1816 , G11B27/36
摘要： A tape drive data storage apparatus incorporates a system for dynamically anticipating and resolving potential data error conditions. The system performs read and/or write data transfer operations on a tape medium, during which time it generates a track performance database representing a map of potential data error conditions occurring on the tape. As operations continue, determination is made from the track performance database whether one or more track fallout thresholds have been reached in one or more regions of the tape. If so, an error recovery bellcord action is performed to minimize the occurrence of data error conditions.
摘要翻译：磁带驱动器数据存储装置包括用于动态预测和解决潜在数据错误状况的系统。该系统在磁带介质上执行读取和/或写入数据传输操作，在此期间，它生成表示磁带上发生的潜在数据错误状况的映射的轨道性能数据库。随着操作的继续，从轨道性能数据库确定是否在磁带的一个或多个区域中达到了一个或多个轨道掉落阈值。如果是这样，则执行错误恢复bellcord操作以最小化数据错误条件的发生。

10. 发明授权

US5331476A Apparatus and method for dynamically performing knowledge-based error recovery 失效
标题翻译：用于动态执行基于知识的错误恢复的装置和方法
公开(公告)号：US5331476A
公开(公告)日：1994-07-19
申请号：US099801
申请日：1993-07-30
申请人： Scott M. Fry , Pamela R. Nylander-Hill , Michael M. Lee , Sushama M. Paranjape
发明人： Scott M. Fry , Pamela R. Nylander-Hill , Michael M. Lee , Sushama M. Paranjape
IPC分类号： G11B20/18 , G11B27/36 , G11B5/09
CPC分类号： G11B20/1883 , G11B20/18 , G11B27/36 , G11B2020/10592 , G11B2220/90
摘要： A tape drive data storage apparatus incorporates an error recovery system that is dynamically controlled to perform knowledge-based error recovery in accordance with a novel error recovery method. As the tape drive apparatus performs read and/or write data transfer operations on a tape medium loaded in the tape drive, an error recovery knowledge base is generated representing a tape map of ECC error correction locations on the tape medium. If error recovery is initiated and it is determined from the tape map that one or more error clustering thresholds have been reached in one or more selected regions of the tape medium, appropriate error recovery action is taken depending on whether a data read or data write operation is underway. If read (or write) data is being processed, the error recovery procedures performed by the error recovery system can be selectively modified in the affected tape medium regions to address the expected cause(s) of the data error. If write data is being processed, the affected tape regions can be demarked so that data is not written thereon during subsequent write operations. In this way, error recovery and data transfer operations can be tailored based on knowledge that localized media defects have been found.
摘要翻译：磁带驱动器数据存储装置包括一个动态控制的错误恢复系统，以根据新颖的错误恢复方法执行基于知识的错误恢复。当磁带驱动装置在装载在磁带驱动器中的磁带介质上执行读取和/或写入数据传输操作时，生成表示磁带介质上ECC纠错位置的磁带映射的错误恢复知识库。如果发起错误恢复，并且从磁带映射确定在磁带介质的一个或多个所选区域中已达到一个或多个错误聚类阈值，则根据数据读取或数据写入操作进行适当的错误恢复操作进展中。如果正在处理读取（或写入）数据，则可以在受影响的磁带介质区域中选择性地修改由错误恢复系统执行的错误恢复过程以解决数据错误的预期原因。如果正在处理写入数据，则可以将受影响的磁带区域标记，以便在后续写入操作期间不在其上写入数据。这样，错误恢复和数据传输操作可以根据已经发现本地化的媒体缺陷的知识进行调整。

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