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As disk volume grows rapidly with terabyte disk becoming a norm, RAID reconstruction time in case of a failure takes prohibitively long time. This paper presents a new RAID architecture, S2-RAID, allowing the disk array to reconstruct very quickly in case of a disk failure. The idea is to form skewed sub RAIDs (S2-RAID) in the RAID structure so that reconstruction can be done in parallel dramatically...
This paper presents a theoretical and experimental study on the limitations of copy-on-write snapshots and incremental backups in terms of data recoverability. We provide mathematical proofs of our new findings as well as implementation experiments to show how data recovery is done in case of various failures. Based on our study, we propose a new system architecture that will overcome the problems...
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