Protecting Data against Consecutive Disk Failures in RAID-5

M. S. Suarez-Castaon, Jehan-Francois Pâris, C. Aguilar-Ibaez
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Abstract

In this letter we present a reorganization method to protect against data loss when one or two disks fail in a RAID level 5. The main advantage of the proposed method is that it is robust against a second failure if a first failed disk has not been replaced yet. Our proposal is motivated by the fact that new disks have a high possibility to fail during their first year of operation and during this period there is enough free space to rebuild the lost data in the failed disk and store it by a reorganization in the remaining disks.
RAID-5硬盘连续故障保护
在这封信中,我们提出了一种重组方法,以防止在RAID级别5中一个或两个磁盘故障时数据丢失。所提出的方法的主要优点是,如果第一个失败的磁盘尚未被替换,它对第二次失败具有鲁棒性。我们的建议是基于这样一个事实,即新磁盘在其运行的第一年有很高的故障可能性,在此期间有足够的空闲空间来重建故障磁盘中的丢失数据,并通过重组将其存储在剩余的磁盘中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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