Details

Autor(en) / Beteiligte

• Baek, Sung
• Kim, Bong
• Joung, Eui
• Park, Chong

Titel

Reliability and performance of hierarchical RAID with multiple controllers

Ist Teil von

• Annual ACM Symposium on Principles of Distributed Computing: Proceedings of the twentieth annual ACM symposium on Principles of distributed computing, 2001, p.246-254

Ort / Verlag

ACM

Erscheinungsjahr

2001

Link zum Volltext

Quelle

ACM Digital Library

Beschreibungen/Notizen

• Redundant arrays of inexpensive disks (RAID) offer fault tolerance against disk failures. However a storage system having more disks suffers from less reliability and performance. A RAID architecture tolerating multiple disk failures shows severe performance degradation in comparison to the RAID Level 5 due to the complexity of implementation. We present a new RAID architecture that tolerates at least three disk failures and offers similar throughout to the RAID Level 5. We call it the hierarchical RAID, which is hierarchically composed of RAID Levels. Furthermore, we formally introduce the mean-time-to-data-loss (MTTDL) of traditional RAID and the hierarchical RAID using Markov process for detailed comparison.