Reliability Modeling of Declustered-Parity RAID Considering Uncorrectable Bit Errors
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概要
- 論文の詳細を見る
UNcorrectable Bit Errors (UNBEs) are important in considering the reliability of Redundant Array of Inexpensive Disks (RAID). They, however, have been ignored or have not been studied in detail in existing reliability analysis of RAID. In this paper, we present an analytic model to study the reliability of declustered-parity RAID by considering UNBEs. By using the analytic model, the optimistic and the pessimistic estimates of the probability that data loss occurs due to an UNBE during the data reconstruction after a disk failed (we call this DB data loss) are obtained. Then, the optimistic and the pessimistic estimates of the Mean Time To Data Loss (MTTDL) that take into account both DB data loss and the data loss caused by double independent disk failures (we call this DD data loss) are obtained. Furthermore, how the MTTDL depends on the number of units in a parity stripe, rebuild time of a failed disk and write fraction of data access are studied by numerical analysis.
- 社団法人電子情報通信学会の論文
- 1997-08-25
著者
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Kameda H
Univ. Tsukuba Tsukuba‐shi Jpn
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Kameda Hisao
The Institute Of Information Sciences And Electronics University Of Tsukuba
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Wu Xuefeng
Graduate School Of University Of Tsukuba
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Kameda Hisao
Institute Of Information Science And Electronics University Of Tsukuba
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LI Jie
The Institute of Information Sciences and Electronics, University of Tsukuba
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LI Jie
Institute of Information Sciences and Electronics, University of Tsukuba
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Li J
Tsinghua Univ. Beijing Chn
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Li Jie
Institute Of Biochemistry And Cell Biology Shanghai Institutes For Biological Sciences Chinese Acade
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