公开(公告)号：US20070273997A1

公开(公告)日：2007-11-29

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： G11B19/02 ,  G11B15/18

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：US5373485A

公开(公告)日：1994-12-13

申请号：US753808

申请日：1991-09-03

申请人： Michael A. Hogan ,  George W. Blattner ,  Charles R. Kummeth ,  Alan R. Olson

发明人： Michael A. Hogan ,  George W. Blattner ,  Charles R. Kummeth ,  Alan R. Olson

IPC分类号： G06F3/06 ,  G11B15/00 ,  G11B20/12 ,  G11B27/10 ,  G11B27/30 ,  G11B7/00 ,  G11B15/18

CPC分类号： G06F3/0601 ,  G11B15/005 ,  G11B20/1205 ,  G11B27/107 ,  G11B27/3027 ,  G06F2003/0698 ,  G11B2220/90 ,  G11B2220/95

摘要： A physical and logical block search method and apparatus that also locates the end of data on a data tape written in a serpentine pattern. A physical address is decoded to determine the track location and physical block address of a physical block on a serpentine data pattern written on a data cartridge tape. The tape is manipulated in the forward and reverse direction depending on the location of the beginning of data on the track. The search algorithm exploits serpentine nature of the tape and the location of the physical blocks in each track to find the physical address. The logical address of a logical block is used to determine a target track number. A prediction is made as to the location of the target track. The prediction is verified by checking the block. If the logical block was not accurately predicted the method repredicts until the logical block is found. The end of tape is located using a binary search based on knowledge of the track assignment of the serpentine data pattern on the tape.

摘要翻译： 一种物理和逻辑块搜索方法和装置，其还将数据的结束定位在以蛇形图案写入的数据带上。 解码物理地址以确定写在数据盒式磁带上的蛇形数据模式上的物理块的轨道位置和物理块地址。 根据磁道上数据开始的位置，磁带在正向和反向方向上被操纵。 搜索算法利用磁带的蛇形性质和每个轨道中物理块的位置来查找物理地址。 逻辑块的逻辑地址用于确定目标轨道号。 对目标轨道的位置进行预测。 通过检查块来验证预测。 如果逻辑块未被准确预测，那么该方法将重新预测，直到发现逻辑块为止。 基于磁带上的蛇形数据图案的轨道分配的知识，使用二进制搜索来定位磁带的末尾。

公开(公告)号：US20120144102A1

公开(公告)日：2012-06-07

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： G06F12/00

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。

公开(公告)号：US08140739B2

公开(公告)日：2012-03-20

申请号：US12228033

申请日：2008-08-08

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。

公开(公告)号：US20100037001A1

公开(公告)日：2010-02-11

申请号：US12228033

申请日：2008-08-08

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

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

IPC分类号： G06F12/06 ,  G06F12/00 ,  G06F12/02

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。

公开(公告)号：US06738210B1

公开(公告)日：2004-05-18

申请号：US09906185

申请日：2001-07-16

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

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

IPC分类号： G11B509

CPC分类号： G11B5/584

摘要： The invention provides techniques for verifying that a servo pattern has been properly recorded. For example, the amplitude of a signal corresponding to magnetic servo patterns can be detected and then compared to a threshold to determine whether the servo patterns were properly recorded. The signal strength may be determined for a servo band that includes multiple servo tracks. To enable this determination, a magnetic head may be designed to have sufficient width to enable the head to detect magnetic signal strength corresponding to more than one servo track.

摘要翻译： 本发明提供了用于验证伺服模式已被适当记录的技术。 例如，可以检测对应于磁性伺服模式的信号的幅度，然后将其与阈值进行比较，以确定伺服模式是否被适当地记录。 可以为包括多个伺服磁道的伺服带确定信号强度。 为了能够进行该确定，可以将磁头设计成具有足够的宽度，以使磁头能够检测对应于多于一个伺服磁道的磁信号强度。