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1. 发明授权

US5325370A Method and apparatus for recording data on magnetic tape media 失效
标题翻译：用于在磁带介质上记录数据的方法和装置
公开(公告)号：US5325370A
公开(公告)日：1994-06-28
申请号：US791791
申请日：1991-11-12
申请人： Brian G. Cleveland , William C. Dodt , Terry R. Gottehrer , Donald F. McCarthy , Charles A. Milligan
发明人： Brian G. Cleveland , William C. Dodt , Terry R. Gottehrer , Donald F. McCarthy , Charles A. Milligan
IPC分类号： G11B15/00 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/28 , G11B27/32 , G06F11/10
CPC分类号： G11B20/1883 , G11B15/005 , G11B20/10 , G11B20/1209 , G11B20/1833 , G11B20/1879 , G11B27/28 , G11B27/328 , G11B20/1211 , G11B2220/90
摘要： The control software and hardware in the tape drive control unit creates and manages a header segment at the beginning of the magnetic tape. This header is interposed between a leader portion of the magnetic tape on the 3480-type cartridge and the remainder of the magnetic tape contained therein. This header segment contains two sections, a first of which is a data record directory that is used by the control unit to denote the location of each data record written on to the magnetic tape as well as administrative information associated with the data record. The second section of the header is an administrative information section that contains data relating to the magnetic tape itself. The stream of data records is divided into data segments, a plurality of which comprise a single helical scan track. The helical scan tracks are formed into scan groups and written on the magnetic tape. At least one longitudinal track is written on the magnetic tape coextensive with the helical scan groups to provide data to enable the tape drive to quickly locate data records recorded on the magnetic tape.
摘要翻译：磁带驱动器控制单元中的控制软件和硬件在磁带开始处创建和管理标题段。该头部插入在3480型盒式磁带的磁带的引导部分和其中包含的其余磁带之间。该标题段包含两个部分，第一部分是数据记录目录，由控制单元用于表示写入磁带的每个数据记录的位置以及与数据记录相关联的管理信息。标题的第二部分是包含与磁带本身相关的数据的管理信息部分。数据记录流被分成多个数据段，其中多个数据段包括单个螺旋扫描轨道。螺旋扫描轨迹形成扫描组并写在磁带上。至少一个纵向磁道被写在与螺旋扫描组共同延伸的磁带上，以提供数据以使磁带机能够快速定位记录在磁带上的数据记录。

2. 发明授权

US5095310A Method and apparatus for using synthesized analog data for testing read circuitry in a magnetic tape data storage subsystem 失效
标题翻译：用于使用合成的模拟数据测试磁带数据存储子系统中的读取电路的方法和装置
公开(公告)号：US5095310A
公开(公告)日：1992-03-10
申请号：US571304
申请日：1990-08-22
申请人： Brian G. Cleveland , Bela A. Geczy
发明人： Brian G. Cleveland , Bela A. Geczy
IPC分类号： G11B5/455 , G11B20/18
CPC分类号： G11B5/455 , G11B20/182
摘要： The system of the present invention makes use of a data synthesizer to produce a synthesized analog data signal representative of a special encoded binary waveform to perform a test on both the magneto resistive element as well as the associated read path electronics independent of operator intervention. The special encoded binary waveform is coupled to the magneto resistive element to produce an approximation of the typical read back signal that is read by the magneto resistive element from a test magnetic tape. The analog signal output by the magneto resistive element is applied to the read back electronics, where it is converted in well known fashion to a digital data signal indicative of the synthesizer block of data that is applied to the magneto resistive element. The output of the read path electronics is applied to a special pattern detector, a sync pattern detector and a test pattern detector which function to detect anomalies in the digital data that is output by the read path electronics.
摘要翻译：本发明的系统利用数据合成器产生代表特殊编码二进制波形的合成模拟数据信号，以便在操作员干预下独立于磁阻元件以及相关读取路径电子装置进行测试。特殊编码的二进制波形耦合到磁阻元件以产生由磁阻元件从测试磁带读取的典型回读信号的近似。由磁阻元件输出的模拟信号被施加到回读电子器件，其中它以众所周知的方式被转换为指示施加到磁阻元件的合成器数据块的数字数据信号。读路径电子器件的输出被应用于特殊模式检测器，同步模式检测器和测试模式检测器，其用于检测由读取路径电子器件输出的数字数据中的异常。

3. 发明授权

US5060089A Data write pulse compensator circuit 失效
标题翻译：数据写脉冲补偿电路
公开(公告)号：US5060089A
公开(公告)日：1991-10-22
申请号：US571307
申请日：1990-08-22
申请人： Brian G. Cleveland
发明人： Brian G. Cleveland
IPC分类号： G11B5/024 , G11B5/09 , G11B20/10 , G11B20/24
CPC分类号： G11B20/10194 , G11B20/24 , G11B5/024 , G11B5/09
摘要： The data write pulse compensator circuit functions to produce an erase frequency that is greater than twice the data frequency using a single clock source to thereby improve the signal to noise ratio in the read back signal. This apparatus uses a precision delay line to produce a series of clock signals with each successively replicated clock signal being delayed a predetermined amount of time with respect to the last previously replicated clock signal. The plurality of generated and delayed clock signals is then combined by a programmable pulse synthesizer to produce a data pulse of a predetermined frequency and width. The same apparatus is also used to produce a pair of erase pulses using a different combination of the delayed replicated clock signals to produce a pulse identical in size and shape to that produced for the data frequency. However, the erase pulses are time shifted such that their apparent frequency is greater than twice the data frequency.
摘要翻译：数据写脉冲补偿器电路用于产生大于数据频率两倍的擦除频率，使用单个时钟源，从而提高回读信号中的信噪比。该装置使用精密延迟线来产生一系列时钟信号，其中每个连续复制的时钟信号相对于最后的先前复制的时钟信号延迟预定的时间量。然后，多个产生和延迟的时钟信号由可编程脉冲合成器组合以产生预定频率和宽度的数据脉冲。同样的装置也用于使用延迟的复制时钟信号的不同组合产生一对擦除脉冲，以产生与数据频率产生的尺寸和形状相同的尺寸和形状的脉冲。然而，擦除脉冲是时移的，使得其表观频率大于数据频率的两倍。

4. 发明授权

US4949197A Dead track acquisition for phase-locked loop control 失效
标题翻译：死路追踪用于锁相环控制
公开(公告)号：US4949197A
公开(公告)日：1990-08-14
申请号：US242031
申请日：1988-09-08
申请人： Brian G. Cleveland
发明人： Brian G. Cleveland
IPC分类号： G11B20/10 , G11B20/18 , G11B27/30
CPC分类号： G11B20/10 , G11B20/18 , G11B27/3027
摘要： An improved phase-locked loop control having DEAD TRACK acquisition wherein a separate oscillator generates a fixed frequency of digital pulses corresponding to the frequency of the data board in the storage media and, in the event of a DEAD TRACK in the storage media, the phase-locked loop control locks onto the fixed frequency output of the oscillator to insure lock during DEAD TRACK integral.
摘要翻译：具有DEAD TRACK采集的改进的锁相环控制，其中单独的振荡器产生与存储介质中的数据板的频率对应的数字脉冲的固定频率，并且在存储介质中的DEAD TRACK的情况下，锁定环路控制锁定到振荡器的固定频率输出，以确保在死区跟踪积分期间锁定。

5. 发明授权

US4901035A Phase-locked loop control for reading data off storage media 失效
标题翻译：用于从存储介质读取数据的锁相环控制
公开(公告)号：US4901035A
公开(公告)日：1990-02-13
申请号：US183843
申请日：1988-04-20
申请人： Brian G. Cleveland
发明人： Brian G. Cleveland
IPC分类号： H03L7/089 , H03L7/14
CPC分类号： H03L7/14 , H03L7/089
摘要： An improved phase-locked loop control having a phase detector receptive of a data preamble of all "ones" from a storage sub-system for producing early and late signals to a voltage controlled oscillator in order for the frequency of the oscillator to be synchronized with the frequency of the data. A pattern detector senses the incoming preamble pulses and prevents the generation of the early and late signals when a preamble pulse is not present within a predetermined window of time.
摘要翻译：一种改进的锁相环控制，其具有接收来自存储子系统的所有“1”的数据前导码的相位检测器，用于将早期和晚期信号产生到压控振荡器，以使振荡器的频率与数据的频率。当预定的时间窗口内不存在前置脉冲时，模式检测器检测输入的前导码脉冲并防止早期和晚期信号的产生。

6. 发明授权

US5566032A Method for utilizing a longitudinal track on a helical scan tape data storage system to provide a fast search capability 失效
标题翻译：用于在螺旋扫描带数据存储系统上利用纵向轨道以提供快速搜索能力的方法
公开(公告)号：US5566032A
公开(公告)日：1996-10-15
申请号：US504540
申请日：1995-07-20
申请人： Brian G. Cleveland , William C. Dodt , Douglas C. Hansen
发明人： Brian G. Cleveland , William C. Dodt , Douglas C. Hansen
IPC分类号： G11B15/087 , G11B15/18 , G11B15/20 , G11B20/12 , G11B27/10 , G11B27/30 , G11B27/32
CPC分类号： G11B20/1207 , G11B15/087 , G11B15/1875 , G11B27/107 , G11B27/3027 , G11B27/32 , G11B27/323 , G11B27/328 , G11B15/1816 , G11B15/20 , G11B2220/90
摘要： A novel method is disclosed for performing a high speed search for a selected data block or data file utilizing any one of several presently existing helical scan tape formats which utilize, in addition to the helically scanned tracks, one or more longitudinal tracks for recording indexing information indicative of the location of data blocks and file marks stored on the associated helical tracks. Data file location information is written to a header area on a series of helical tracks and to one (or more) of the longitudinal tracks when a data block or a file mark is written to a tape. A high speed search for a desired data block or data file can then be performed using this track location information.
摘要翻译：公开了一种新颖的方法，用于使用现有的几种螺旋扫描磁带格式中的任何一种执行对所选数据块或数据文件的高速搜索，除了螺旋扫描的轨道之外，还使用一个或多个纵向轨道来记录索引信息指示存储在相关联的螺旋轨道上的数据块和文件标记的位置。当将数据块或文件标记写入磁带时，将数据文件位置信息写入一系列螺旋磁道上的标题区域和一条（或多条）纵向磁道。然后可以使用该轨道位置信息来执行对所需数据块或数据文件的高速搜索。

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