Fuzzy Reliability Analysis of Two-Disk Failure-Tolerant Disk Arrays

Abstract

This paper presents a data placement of a two-disk failure-tolerant disk arrays system, a code-mixing solution RAID5x with XOR-based code and mirror for disk arrays to improve performance of accessing storage system with high reliability. RAID5x is not only just higher in storage efficiency than other code-mixing solutions of the same type, but also it has the higher accessing performance over them and XOR-based code solutions, and then analyzed the reliability of this system by combination of fuzzy logic and Markov modeling. This reliability method is a technique for analyzing fault tolerant designs under considerable uncertainty, such as is seen in compilations of component failure rates, the presented model provides the estimation of the lower and upper boundary of a two-disk failure-tolerant disk array system with a single run of the model.