本文通过对纠错编码理论及有限域数学理论的研究分析，发现利用其二者相通的性质及运算规则，可以将基于Galois域的Reed-Solomon算法应用到RAID6（Redundant Array of Independent Disk独立冗余磁盘阵列）磁盘阵列当中进行数据的恢复，...本文通过对纠错编码理论及有限域数学理论的研究分析，发现利用其二者相通的性质及运算规则，可以将基于Galois域的Reed-Solomon算法应用到RAID6（Redundant Array of Independent Disk独立冗余磁盘阵列）磁盘阵列当中进行数据的恢复，并对此技术方法的性能进行了分析．展开更多
日前，LSI逻辑公司在美国”存储网络世界展”上展示了业界首例基于SAS的RAID6技术。秉承率先向市场推出SAS技术战略。LSI逻辑的4端口LSISAS1064控制器运行在一款HPSAS系统上。展示了具有ADG(Advanced Data Guarding)技术的RAID6技术，...日前，LSI逻辑公司在美国”存储网络世界展”上展示了业界首例基于SAS的RAID6技术。秉承率先向市场推出SAS技术战略。LSI逻辑的4端口LSISAS1064控制器运行在一款HPSAS系统上。展示了具有ADG(Advanced Data Guarding)技术的RAID6技术，它能使IT用户即使在两个驱动器都出现故障的情况下恢复存储的数据。展开更多
X-Code is one of the most important redundant array of independent disk （RAID）-6 codes which are capable of tolerating double disk failures. However, the code length of X-Code is restricted to be a prime number, and...X-Code is one of the most important redundant array of independent disk （RAID）-6 codes which are capable of tolerating double disk failures. However, the code length of X-Code is restricted to be a prime number, and such code length restriction of X-Code limits its usage in the real storage systems. Moreover, as a vertical RAID-6 code, X-Code can not be extended easily to an arbitrary code length like horizontal RAID-6 codes. In this paper, a novel and efficient code shortening algorithm for X-Code is proposed to extend X-Code to an arbitrary length. It can be further proved that the code shortening algorithm maintains the maximum-distance-separable （MDS） property of X-Code, and namely, the shortened X-Code is still MDS code with the optimal space efficiency. In the context of the shortening algorithm for X-Code, an in-depth performance analysis on X-Code at consecutive code lengths is conducted, and the impacts of the code shortening algorithm on the performance of X-Code in various performance metrics are revealed.展开更多
文摘本文通过对纠错编码理论及有限域数学理论的研究分析，发现利用其二者相通的性质及运算规则，可以将基于Galois域的Reed-Solomon算法应用到RAID6（Redundant Array of Independent Disk独立冗余磁盘阵列）磁盘阵列当中进行数据的恢复，并对此技术方法的性能进行了分析．
文摘日前，LSI逻辑公司在美国”存储网络世界展”上展示了业界首例基于SAS的RAID6技术。秉承率先向市场推出SAS技术战略。LSI逻辑的4端口LSISAS1064控制器运行在一款HPSAS系统上。展示了具有ADG(Advanced Data Guarding)技术的RAID6技术，它能使IT用户即使在两个驱动器都出现故障的情况下恢复存储的数据。
基金supported by the National Basic Research Program of China (Grant Nos.2011CB302300, 2011CB302301)the National High-Technology Research and Development Program of China (Grant Nos.2009AA01A401,2009AA01A402)+1 种基金the National Natural Science Foundation of China (Grant Nos.60873028, 60933002, 61025008)the Changjiang Innovation Group of Education of China (Grant No.IRT0725)
文摘X-Code is one of the most important redundant array of independent disk （RAID）-6 codes which are capable of tolerating double disk failures. However, the code length of X-Code is restricted to be a prime number, and such code length restriction of X-Code limits its usage in the real storage systems. Moreover, as a vertical RAID-6 code, X-Code can not be extended easily to an arbitrary code length like horizontal RAID-6 codes. In this paper, a novel and efficient code shortening algorithm for X-Code is proposed to extend X-Code to an arbitrary length. It can be further proved that the code shortening algorithm maintains the maximum-distance-separable （MDS） property of X-Code, and namely, the shortened X-Code is still MDS code with the optimal space efficiency. In the context of the shortening algorithm for X-Code, an in-depth performance analysis on X-Code at consecutive code lengths is conducted, and the impacts of the code shortening algorithm on the performance of X-Code in various performance metrics are revealed.
