Analysis of Codes for Tolerating Double Disk Failures in RAID Architectures

冯丹; 张江陵

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Analysis of Codes for Tolerating Double Disk Failures in RAID Architectures

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- Analysis of Codes for Tolerating Double Disk Failures in RAID Architectures
- Acta Electronica Sinica Issue 5, Pages: 93-96(1998)
- 作者机构：
  
  1. 华中理工大学计算机科学与工程系!武汉
  2. 430074
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP393
- Published：1998
- 稿件说明：
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[1]冯丹,张江陵.适用于磁盘阵列的纠双错码分析[J].电子学报,1998(05):93-96.

冯丹, 张江陵. Analysis of Codes for Tolerating Double Disk Failures in RAID Architectures[J]. Acta Electronica Sinica, 1998, (5): 93-96.
[1]冯丹,张江陵.适用于磁盘阵列的纠双错码分析[J].电子学报,1998(05):93-96. DOI：

冯丹, 张江陵. Analysis of Codes for Tolerating Double Disk Failures in RAID Architectures[J]. Acta Electronica Sinica, 1998, (5): 93-96. DOI：

摘要

比较分析了三种适用于盘阵列的纠双错码：二维奇偶校验（2D）、Reed－Solomon（RS）码以及EVENODD码的编码、译码复杂度及其相应小写性能．2D码编码简单，但构成阵列“性能／价格”差．RS和EVENODD码为最优冗分编码，RS码编、译码较EVENODD码复杂，但小写性能比EVENODD编码好．

Abstract

There are three types of codes for tolerating double disk failures in RAID（Redundant Arrays of Independent Disks） architectures: two dimension （2D） parity codes

Reed-Solomon（RS） codes and EVENODD codes.The complexity of encoding and decoding and the small write performance of the three types of codes are compared and analyzed. It is pointed out that the encoding of 2D codes is the simplest of the three

but the performance/price is lowest. Both RS and EVENODD codes require an optimal number of redundant disks

namely two.The RS codes are more complex than EVENODD

but the small write performance of RS is better than that of EVENODD.

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