MP-RAID: Mirroring and parity protected disk array  

作　　者：毛波 冯丹 吴素贞 

机构地区：[1]Wuhan National Laboratory for Optoelectronics, School of Computer Science and Technology, Huazhong University of Science and Technology

出　　处：《Journal of Shanghai University(English Edition)》2009年第6期444-449,共6页上海大学学报（英文版）

基　　金：Project supported by the National Basic Research Program of China (Grant No.2004CB318201);the National High-Technology Research and Development Program of China (Grant No.2008AA01A401);the Changjiang Innovative Group of Ministry of Education of China (Grant No.IRT0725)

摘　　要：Redundant array of inexpensive disk （RAID）10 is known as the most reliable disk array architecture to tolerate up to half of total disk failures, but failure of two disks in the same mirror set still results in data loss. In this paper, we propose a new disk array architecture, mirroring and parity protected RAID （MP-RAID）, which combines both mirroring and parity techniques to further improve reliability of disk arrays. The main idea behind MP-RAID is to protect the data by both mirroring and parity techniques： keep two copies of data in the same mirror set and update the parity block in the log disk within the same parity groups. Reliability analysis shows that the reliability of MP-RAID, in terms of mean time to data loss （MTTDL）, is much better than RAID10 and RAID5.Redundant array of inexpensive disk （RAID）10 is known as the most reliable disk array architecture to tolerate up to half of total disk failures, but failure of two disks in the same mirror set still results in data loss. In this paper, we propose a new disk array architecture, mirroring and parity protected RAID （MP-RAID）, which combines both mirroring and parity techniques to further improve reliability of disk arrays. The main idea behind MP-RAID is to protect the data by both mirroring and parity techniques： keep two copies of data in the same mirror set and update the parity block in the log disk within the same parity groups. Reliability analysis shows that the reliability of MP-RAID, in terms of mean time to data loss （MTTDL）, is much better than RAID10 and RAID5.

关 键 词：storage systems redundant array of inexpensive disk （RAID） reliability analysis mean time to data loss （MTTDL） 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]