公开(公告)号：US20080198500A1

公开(公告)日：2008-08-21

申请号：US11708762

申请日：2007-02-20

申请人： Mark P. Weber ,  Richard E. Jewett ,  Douglas W. Johnson ,  Richard W. Molstad ,  Alan R. Olson

发明人： Mark P. Weber ,  Richard E. Jewett ,  Douglas W. Johnson ,  Richard W. Molstad ,  Alan R. Olson

IPC分类号： G11B5/596

CPC分类号： G11B5/584

摘要： In general, the invention is directed to servo techniques that utilize servo patterns to facilitate head positioning relative to the data tracks. For example, the servo techniques may include a first series of servo patterns configured to allow calculation of a position error signal that substantially mitigates error resulting from a variation in velocity of the data storage tape during detection of the at least one of the servo patterns in the first series. The servo techniques may also include a second series of servo patterns interleaved within the first series of servo patterns in order to encode data. The encoded data may include linear position information. Embodiments may allow a data storage tape meeting a currently accepted data storage tape specification, e.g., an LTO Ultrium specification, to record data in a higher density than currently implemented with the specification.

摘要翻译： 通常，本发明涉及利用伺服模式以便于相对于数据轨道进行头部定位的伺服技术。 例如，伺服技术可以包括第一系列伺服模式，所述第一系列伺服模式被配置为允许计算位置误差信号，所述位置误差信号基本上减轻在检测到所述伺服模式中的至少一个伺服模式期间数据存储带的速度变化导致的误差 第一个系列。 伺服技术还可以包括在第一系列伺服模式中交错的第二系列伺服模式，以便对数据进行编码。 编码数据可以包括线性位置信息。 实施例可以允许满足当前接受的数据存储磁带规范（例如LTO Ultrium规范）的数据存储磁带以比当前在说明书中实现的密度更高的密度记录数据。

公开(公告)号：US07495859B2

公开(公告)日：2009-02-24

申请号：US11708762

申请日：2007-02-20

申请人： Mark P. Weber ,  Richard E. Jewett ,  Douglas W. Johnson ,  Richard W. Molstad ,  Alan R. Olson

发明人： Mark P. Weber ,  Richard E. Jewett ,  Douglas W. Johnson ,  Richard W. Molstad ,  Alan R. Olson

IPC分类号： G11B5/584

CPC分类号： G11B5/584

摘要： In general, the invention is directed to servo techniques that utilize servo patterns to facilitate head positioning relative to the data tracks. For example, the servo techniques may include a first series of servo patterns configured to allow calculation of a position error signal that substantially mitigates error resulting from a variation in velocity of the data storage tape during detection of the at least one of the servo patterns in the first series. The servo techniques may also include a second series of servo patterns interleaved within the first series of servo patterns in order to encode data. The encoded data may include linear position information. Embodiments may allow a data storage tape meeting a currently accepted data storage tape specification, e.g., an LTO Ultrium specification, to record data in a higher density than currently implemented with the specification.

摘要翻译： 通常，本发明涉及利用伺服模式以便于相对于数据轨道进行头部定位的伺服技术。 例如，伺服技术可以包括第一系列伺服模式，所述第一系列伺服模式被配置为允许计算位置误差信号，所述位置误差信号基本上减轻在检测到所述伺服模式中的至少一个伺服模式期间数据存储带的速度变化导致的误差 第一个系列。 伺服技术还可以包括在第一系列伺服模式中交错的第二系列伺服模式，以便对数据进行编码。 编码数据可以包括线性位置信息。 实施例可以允许满足当前接受的数据存储磁带规范（例如LTO Ultrium规范）的数据存储磁带以比当前在说明书中实现的密度更高的密度记录数据。

公开(公告)号：US6134070A

公开(公告)日：2000-10-17

申请号：US861664

申请日：1997-05-22

申请人： Hung T. Tran ,  Theodore A. Schwarz ,  Robert J. Youngquist ,  Alan R. Olson ,  Richard W. Molstad ,  Gary D. Moeller ,  Richard E. Jewett ,  Christopher L. Hill

发明人： Hung T. Tran ,  Theodore A. Schwarz ,  Robert J. Youngquist ,  Alan R. Olson ,  Richard W. Molstad ,  Gary D. Moeller ,  Richard E. Jewett ,  Christopher L. Hill

IPC分类号： G11B5/31 ,  G11B5/008 ,  G11B5/265 ,  G11B5/48 ,  G11B5/55 ,  G11B5/584 ,  G11B21/08 ,  G11B21/10 ,  G11B21/02

CPC分类号： G11B5/4893 ,  G11B21/086 ,  G11B21/103 ,  G11B5/5504 ,  G11B5/584 ,  G11B5/5508

摘要： A servo track recording tape includes a plurality of data tracks and a servo band dedicated for servo information. The servo band includes substantially uniformly written servo carrier information across a predetermined servo carrier width along the length of the tape with at least one encoded track pitch defined therein. Each encoded track pitch has alternating erased and non-erased portions along the length of the tape for defining servo tracks. The alternating erased and non-erased portions of the at least one encoded track pitch include encoded information provided by varying the length of one or more of the erased portions. The encoded information may be representative of tape locations along the length of the tape. The servo band may include two or more encoded track pitches defined in the substantially uniformly written servo carrier information with each encoded track pitch defining corresponding servo tracks. The alternating erased and non-erased portions of each of the two or more encoded track pitches may include encoded information uniquely identifying the corresponding servo tracks. Another servo tracking data recording tape includes a servo band including at least one single frequency servo track written in an erased width of the servo band along the length of the tape. The single frequency servo track includes encoded blocks of information along the length of the tape representative of at least one characteristic of the tape. Systems, head assemblies and encoding methods for use in providing such encoded servo track recording tape configurations are also described.

摘要翻译： 伺服记录磁带包括多个数据磁道和专用于伺服信息的伺服带。 伺服带包括沿着带长度的预定伺服载波宽度的基本均匀地写入的伺服载波信息，其中限定了至少一个编码的轨道间距。 每个编码的轨道间距具有沿磁带长度的交替擦除和不擦除部分，用于定义伺服磁道。 至少一个编码轨道间距的交替擦除和未擦除部分包括通过改变一个或多个擦除部分的长度而提供的编码信息。 编码信息可以代表沿磁带长度的磁带位置。 伺服带可以包括在基本均匀地写入的伺服载体信息中限定的两个或多个编码的轨道间距，每个编码的轨道间距限定对应的伺服轨道。 两个或多个编码轨道间距中的每一个的交替擦除和未擦除部分可以包括唯一地识别对应的伺服轨道的编码信息。 另一个伺服跟踪数据记录带包括一个伺服带，该伺服带包括至少一个沿着磁带长度写入伺服带的擦除宽度的单个频率伺服磁道。 单频伺服磁道包括代表带的至少一个特征的沿磁带长度的编码信息块。 还描述了用于提供这种编码伺服记录带配置的系统，头组件和编码方法。

公开(公告)号：US5452150A

公开(公告)日：1995-09-19

申请号：US266003

申请日：1994-06-27

申请人： Stacy A. Henneberger ,  Christopher L. Hill ,  Richard W. Molstad ,  Alan R. Olson ,  Steven R. Seeman

发明人： Stacy A. Henneberger ,  Christopher L. Hill ,  Richard W. Molstad ,  Alan R. Olson ,  Steven R. Seeman

IPC分类号： G11B23/34 ,  G11B5/008 ,  G11B15/06 ,  G11B15/087 ,  G11B20/12 ,  G11B23/36 ,  G11B27/28 ,  G11B5/09 ,  G11B15/18

CPC分类号： G11B15/06 ,  G11B15/087 ,  G11B20/1205 ,  G11B23/36 ,  G11B5/00817

摘要： The tape in a data cartridge has a beginning of tape (BOT) zone adjacent a leading end, a load point (LP) zone adjacent the BOT zone, an end of tape (EOT) zone adjacent a trailing end, an early warning (EW) zone adjacent the EOT zone, and a data recording (DR) zone between the LP and EW zones. Servo tracks extending between the BOT and EOT enable the closed-loop servo operation of a tape deck during the recording of data at data flux transition densities within a predetermined range of flux transition densities. A BOT indicator includes a first type magnetic marker extending throughout the BOT zone and has a BOT flux density. An LP indicator includes spaced second type magnetic markers on the servo tracks at the border of the LP and DR zones. An EW indicator which is identical to the LP indicator is located on the servo tracks at the border of the DR and EW zones. An EOT indicator includes a first type marker extending throughout the EOT zone and has an EOT flux density. Digitally encoded cartridge information indicators including the spaced second type markers are located in each of the BOT and EOT zones. The BOT and EOT flux densities are different from one another, and sufficiently different from the data flux transition densities to enable the BOT and EOT indicators to be distinguished from the data. The second type markers of the LP and EW and cartridge information indicators are sufficiently different from the servo carrier flux density to enable the indicators to be distinguished from the servo carrier.

摘要翻译： 数据盒式磁带中的胶带具有与前端相邻的胶带（BOT）区域，邻近BOT区域的装载点（LP）区域，与尾端相邻的磁带（EOT）区域的末端，预警（EW ）区域，以及LP和EW区域之间的数据记录（DR）区域。 在BOT和EOT之间延伸的伺服轨道能够在磁通量转换密度的预定范围内的数据通量转换密度记录数据期间实现磁带机的闭环伺服操作。 BOT指示器包括延伸穿过BOT区域并具有BOT通量密度的第一类型磁性标记。 LP指示器在LP和DR区域的边界处的伺服轨道上包括间隔开的第二类型的磁标记。 与LP指示灯相同的EW指示器位于DR和EW区域边界的伺服轨道上。 EOT指示器包括延伸穿过EOT区域并具有EOT通量密度的第一类型标记。 包括间隔开的第二类型标记的数字编码的盒信息指示器位于BOT和EOT区中的每一个中。 BOT和EOT通量密度彼此不同，与数据通量转换密度充分不同，使BOT和EOT指标能够与数据区别开来。 LP和EW和墨盒信息指示器的第二种类型标记与伺服载体磁通密度充分不同，以使指示符与伺服载体不同。

公开(公告)号：US07035040B2

公开(公告)日：2006-04-25

申请号：US10439579

申请日：2003-05-16

申请人： Richard W. Molstad ,  Alan R. Olson

发明人： Richard W. Molstad ,  Alan R. Olson

IPC分类号： G11B5/584 ,  G11B5/09

CPC分类号： G11B5/584 ,  G11B5/00813

摘要： The invention is directed to servo techniques that make use of sequences of servo marks, rather than individual marks for generation of position error signals. In particular, random or pseudo-random sequences of servo marks may be recorded on the medium in an overlapping fashion. For example, a first sequence of marks and a second sequence of marks may overlap in the servo track. The second sequence may be substantially non-correlated with the first sequence, and may be recorded in an offset location along the track relative to the first sequence. Different correlators can be used to detect the different sequences, and position error signals can be generated based on timings associated with the detection of the first sequence relative to the second sequence.

摘要翻译： 本发明涉及使用伺服标记序列而不是用于产生位置误差信号的单独标记的伺服技术。 特别地，伺服标记的随机或伪随机序列可以以重叠的方式记录在介质上。 例如，标记的第一序列和第二序列标记可能在伺服轨道中重叠。 第二序列可以与第一序列基本上不相关，并且可以相对于第一序列沿着轨道记录在偏移位置。 可以使用不同的相关器来检测不同的序列，并且可以基于与第一序列相对于第二序列的检测相关联的定时来生成位置误差信号。

公开(公告)号：US20080049356A1

公开(公告)日：2008-02-28

申请号：US11508508

申请日：2006-08-23

申请人： Mark P. Weber ,  Alan R. Olson

发明人： Mark P. Weber ,  Alan R. Olson

IPC分类号： G11B5/584 ,  G11B5/09

CPC分类号： G11B5/584

摘要： Data storage tape comprises one or more data tracks and a servo band. The servo band stores a plurality of servo patterns within a servo frame to facilitate head positioning relative to the data tracks. Spacings between the servo patterns within the servo frame vary to encode information in the servo frame. A number of bits in the information is greater than a number of servo patterns within the frame. Servo patterns in different servo bands on the data storage tape may be different to provide band identification information. The different servo patterns of the different servo bands may allow lateral position calculations using the same formula for each servo pattern.

摘要翻译： 数据存储磁带包括一个或多个数据磁道和伺服磁带。 伺服带在伺服帧内存储多个伺服模式以便于相对于数据轨道的头部定位。 伺服帧内的伺服模式之间的间距会变化，从而对伺服帧中的信息进行编码。 信息中的位数大于帧内的多个伺服模式。 数据存储带上的不同伺服频带中的伺服模式可能不同，以提供频带识别信息。 不同伺服带的不同伺服模式可以允许对于每个伺服模式使用相同的公式进行横向位置计算。

公开(公告)号：US07538969B2

公开(公告)日：2009-05-26

申请号：US11508508

申请日：2006-08-23

申请人： Mark P. Weber ,  Alan R. Olson

发明人： Mark P. Weber ,  Alan R. Olson

IPC分类号： G11B5/584

CPC分类号： G11B5/584

摘要： Data storage tape comprises one or more data tracks and a servo band. The servo band stores a plurality of servo patterns within a servo frame to facilitate head positioning relative to the data tracks. Spacings between the servo patterns within the servo frame vary to encode information in the servo frame. A number of bits in the information is greater than a number of servo patterns within the frame. Servo patterns in different servo bands on the data storage tape may be different to provide band identification information. The different servo patterns of the different servo bands may allow lateral position calculations using the same formula for each servo pattern.

摘要翻译： 数据存储磁带包括一个或多个数据磁道和伺服磁带。 伺服带在伺服帧内存储多个伺服模式以便于相对于数据轨道的头部定位。 伺服帧内的伺服模式之间的间距会变化，从而对伺服帧中的信息进行编码。 信息中的位数大于帧内的多个伺服模式。 数据存储带上的不同伺服频带中的伺服模式可能不同，以提供频带识别信息。 不同伺服带的不同伺服模式可以允许对于每个伺服模式使用相同的公式进行横向位置计算。

公开(公告)号：US07545594B2

公开(公告)日：2009-06-09

申请号：US11441523

申请日：2006-05-26

申请人： Alan R. Olson

发明人： Alan R. Olson

IPC分类号： G11B5/09 ,  G11B5/02

CPC分类号： G11B5/00813 ,  G11B5/09 ,  G11B2005/0016

摘要： The disclosure describes a data storage system that includes a signal defect correction system for removing signal defects in magnetoresistive head playback signals. The signal defect correction system utilizes a matched finite impulse response (FIR) filter and digital signal processing algorithms. The matched FIR filter is designed with an impulse response that is the time reversed, complex conjugate of a signal defect model. The signal defect model is generated from a number of sample playback signals. The matched FIR filter is applied to the playback signal and digital signal processing techniques are applied to the filter response to detect a signal defect in the playback signal and estimate the amplitude and location of the signal defect. The signal defect model is retrieved from memory and applied to the playback signal using the amplitude and location estimates to substantially remove the signal defect from the playback signal.

摘要翻译： 本公开描述了一种数据存储系统，其包括用于消除磁阻头重放信号中的信号缺陷的信号缺陷校正系统。 信号缺陷校正系统利用匹配的有限脉冲响应（FIR）滤波器和数字信号处理算法。 匹配的FIR滤波器被设计为具有时间反转的脉冲响应，信号缺陷模型的复共轭。 信号缺陷模型由多个采样重放信号产生。 将匹配的FIR滤波器应用于重放信号，并且将数字信号处理技术应用于滤波器响应，以检测重放信号中的信号缺陷并估计信号缺陷的幅度和位置。 从存储器检索信号缺陷模型，并使用振幅和位置估计将其应用于重放信号，以从重放信号基本上去除信号缺陷。

公开(公告)号：US07196859B2

公开(公告)日：2007-03-27

申请号：US10888857

申请日：2004-07-09

申请人： Alan R. Olson

发明人： Alan R. Olson

IPC分类号： G11B5/02 ,  G11B20/06

CPC分类号： G11B5/584

摘要： Techniques are described for accurately processing playback signals of time-based servo patterns recorded on a data storage medium. In particular, techniques are described for determining values for signal peaks within a playback signal of a time-based servo pattern by applying interpolation to data points in proximity to each of the signal peaks. At least three data points are identified in proximity to a desired peak to be detected within the playback signal. A value is calculated for the desired peak based on interpolation of the at least three data points. A playback signal of a time-based servo pattern may include a sequence of signal peaks. A time-based servo pattern may be detected based on lengths of time measured between consecutive peaks in the sequence of peaks. A position error signal (PES) may be generated based on the values calculated for each of the sequence of peaks.

摘要翻译： 描述了用于精确地处理记录在数据存储介质上的基于时间的伺服模式的重放信号的技术。 特别地，描述了通过对接近每个信号峰值的数据点进行插值来确定基于时间的伺服模式的重放信号内的信号峰值的技术。 至少三个数据点被识别为在重放信号内要检测的期望峰值附近。 基于至少三个数据点的插值计算所需峰值的值。 基于时间的伺服模式的重放信号可以包括信号峰值序列。 可以基于在峰序列中的连续峰之间测量的时间长度来检测基于时间的伺服模式。 可以基于针对每个峰序列计算的值来生成位置误差信号（PES）。

公开(公告)号：US08745319B2

公开(公告)日：2014-06-03

申请号：US13372011

申请日：2012-02-13

申请人： Denis J. Langlois ,  Alan R. Olson

发明人： Denis J. Langlois ,  Alan R. Olson

IPC分类号： G06F13/00

CPC分类号： G06F12/0246 ,  G06F2212/7203 ,  G06F2212/7207 ,  Y02D10/13

摘要： A flash memory based storage device may utilize magnetoresistive random access memory (MRAM) as at least one of a device memory, a buffer, or high write volume storage. In some embodiments, a processor of the storage device may compare a logical block address of a data file to a plurality of logical block addresses stored in a write frequency file buffer table and causes the data file to be written to the high write volume MRAM when the logical block address of the data file matches at least one of the plurality of logical block addresses stored in the write frequency file buffer table. In other embodiments, upon cessation of power to the storage device, the MRAM buffer stores the data until power is restored, after which the processor causes the buffered data to be written to the flash memory under control of the flash memory controller.

摘要翻译： 基于闪速存储器的存储设备可以利用磁阻随机存取存储器（MRAM）作为设备存储器，缓冲器或高写入卷存储器中的至少一个。 在一些实施例中，存储设备的处理器可以将数据文件的逻辑块地址与存储在写入频率文件缓冲表中的多个逻辑块地址进行比较，并且使数据文件被写入到高写入卷MRAM中，当 数据文件的逻辑块地址与存储在写频文件缓冲表中的多个逻辑块地址中的至少一个相匹配。 在其他实施例中，在停止向存储设备供电时，MRAM缓冲器存储数据，直到电源恢复，之后处理器在缓冲存储器控制器的控制下使缓冲的数据被写入闪速存储器。