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    • 41. 发明授权
    • Framing selection and waveform polarity determination for an encoded repeating pattern
    • 编码重复图案的成帧选择和波形极性确定
    • US07760459B1
    • 2010-07-20
    • US11953794
    • 2007-12-10
    • Ke HanPantas SutardjaRui Cao
    • Ke HanPantas SutardjaRui Cao
    • G11B21/02G11B5/596G11B20/06
    • G11B5/59644G11B20/14
    • Systems and techniques to select a framing and determine a waveform polarity of an encoded repeating pattern include, in at least one aspect, operations including: decoding an encoded repeating pattern using multiple framings of signal samples of a signal from a machine-readable medium; correlating the signal samples that indicate pattern transitions, for the multiple framings, with valid pattern transitions as defined by the encoding; accumulating the transition pattern correlations for the multiple framings; selecting one of the multiple framings as a correct framing for decoding based on the accumulated correlations; and determining a waveform polarity for the signal based on the repeating pattern and the selected correct framing.
    • 选择成帧并确定编码的重复图案的波形极性的系统和技术在至少一个方面包括以下操作:包括:使用来自机器可读介质的信号的信号样本的多个成帧来对编码的重复图案进行解码; 对于多个帧,指示模式转换的信号样本与由编码定义的有效模式转换相关; 累积多个帧的过渡模式相关性; 基于累积的相关性,将多个帧中的一个选择为正确的解码帧; 以及基于所述重复图案和所选择的正确框架确定所述信号的波形极性。
    • 43. 发明申请
    • TESTING STORAGE SYSTEM ELECTRONICS USING LOOPBACK
    • 使用回波测试存储系统电子
    • US20100110574A1
    • 2010-05-06
    • US12685249
    • 2010-01-11
    • Pantas Sutardja
    • Pantas Sutardja
    • G11B5/09
    • G11B27/36G11B2220/2516
    • A system includes a hard disk controller module configured to control a hard disk. A read channel device is in communication with the hard disk controller module via a read bus and a write bus. The read channel device includes a loopback circuit configured to selectively loop back the write bus to the read bus. The read channel is configured to generate a write clock for the hard disk controller module to write data on the write bus. The read channel is configured to generate a read clock for the hard disk controller module to read the data on the read bus. The write clock is independent of the read clock.
    • 系统包括配置成控制硬盘的硬盘控制器模块。 读通道设备通过读总线和写总线与硬盘控制器模块通信。 读通道器件包括一个环回电路,该回路电路被配置为选择性地将写总线环回到读总线。 读通道被配置为产生用于硬盘控制器模块在写总线上写入数据的写时钟。 读通道被配置为产生用于硬盘控制器模块读取读总线上的数据的读时钟。 写时钟与读时钟无关。
    • 46. 发明授权
    • Efficient RAID ECC controller for RAID systems
    • RAID系统的高效RAID ECC控制器
    • US07657823B1
    • 2010-02-02
    • US11805332
    • 2007-05-23
    • Heng TangZining WuGregory BurdPantas Sutardja
    • Heng TangZining WuGregory BurdPantas Sutardja
    • H03M13/00
    • G06F11/1076G06F11/08G06F11/1443G11C29/00H03M13/09H03M13/1515H03M13/155H03M13/611H03M13/618
    • A Redundant Array of Inexpensive Disks (RAID) controller comprises a RAID error correction code (ECC) encoder module that receives data for storage and that generates code words stored by data drives and one or more parity drives, which have physical locations. The code words are generated based on the data and a cyclic code generator polynomial. Logical locations correspond to an index of the cyclic code generator polynomial. A mapping module maps the physical locations of the data and parity drives to the logical locations. A difference generating module generates a difference code word when data on one of the data drives is modified. The RAID ECC encoder module encodes the difference code word and adds the encoded difference code word to an original code word generated before the modification.
    • 一个廉价磁盘冗余阵列(RAID)控制器包括一个RAID纠错码(ECC)编码器模块,它接收用于存储的数据,并生成由数据驱动器存储的代码字和一个或多个具有物理位置的奇偶校验驱动器。 基于数据和循环码生成多项式生成码字。 逻辑位置对应于循环码生成多项式的索引。 映射模块将数据和奇偶校验驱动器的物理位置映射到逻辑位置。 当数据驱动器之一上的数据被修改时,差分产生模块产生差异码字。 RAID ECC编码器模块对差分码字进行编码,并将编码的差码字添加到在修改之前生成的原始码字。
    • 49. 发明授权
    • Disk servo pattern writing
    • 磁盘伺服模式写入
    • US07580216B1
    • 2009-08-25
    • US11953811
    • 2007-12-10
    • Ke HanPantas SutardjaRui Cao
    • Ke HanPantas SutardjaRui Cao
    • G11B21/02G11B5/596G11B20/06
    • G11B5/59644G11B20/14
    • Systems and techniques to write servo patterns on machine-readable media. In general, in one implementation, the technique includes: obtaining timing information from a spiral servo reference track on a machine-readable medium to determine head position, and generating a servo track with servo information based on the determined head position. Obtaining the timing information can involve determining a peak position of a diamond-shaped waveform and identifying occurrences of a timing-reference symbol in the spiral servo reference track. Moreover, identifying occurrences of the timing-reference symbol can involve decoding an encoded repeating pattern using multiple framings, correlating signal samples that indicate pattern transitions with valid pattern transitions as defined by the encoding, accumulating the transition pattern correlations for the multiple framings, selecting one of the multiple framings as a correct framing, and determining a waveform polarity for the signal.
    • 在机器可读介质上写入伺服模式的系统和技术。 通常,在一个实现中,该技术包括:从机器可读介质上的螺旋伺服参考轨道获取定时信息以确定磁头位置,以及基于确定的磁头位置产生具有伺服信息的伺服磁道。 获取定时信息可以包括确定菱形波形的峰值位置并且识别螺旋伺服参考轨道中的定时参考符号的出现。 此外,识别定时参考符号的出现可以包括使用多个成帧对编码的重复模式进行解码,将指示模式转换的信号样本与由编码定义的有效模式转换相关联,累积多个帧的转换模式相关性,选择一个 的多个帧作为正确的帧,并且确定该信号的波形极性。