NDLI: Failure Prediction Models for Proactive Fault Tolerance within Storage Systems

Content Provider	IEEE Xplore Digital Library
Author	Eckart, B. Xin Chen Xubin He Scott, S.L.
Copyright Year	2008
Description	Author affiliation: Oak Ridge Nat. Lab., Oak Ridge, TN (Scott, S.L.) \|\| Tennessee Technol. Univ., TN (Eckart, B.; Xin Chen; Xubin He)
Abstract	The increasingly large demand for data storage has spurred on the development of systems that rely on the aggregate performance of multiple hard drives. In many of these applications, reliability and availability are of utmost importance. It is therefore necessary to closely scrutinize a complex storage system's reliability characteristics. In this paper, we use Markov models to rigorously demonstrate the effects that failure prediction has on a system's mean time to data loss (MTTDL) given a parameterized sensitivity. We devise models for a single hard drive, RAID1, and N+1 type RAID systems. We find that the normal SMART failure prediction system has little impact on the MTTDL, but striking results can be seen when the sensitivity of the predictor reaches 0.5 or more. In past research, machine learning techniques have been proposed to improve SMART, showing that sensitivity levels of 0.5 or more are possible by training on past SMART data alone. The results of our stochastic models show that even with such relatively modest predictive power, these failure prediction algorithms can drastically extend the MTTDL of a data storage system. We feel that these results underscore the importance and need for complex prediction systems when calculating impending hard drive failures.
Starting Page	1
Ending Page	8
File Size	2419413
Page Count	8
File Format	PDF
ISBN	9781424428175
ISSN	15267539
DOI	10.1109/MASCOT.2008.4770560
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-09-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Predictive models Fault tolerant systems Memory Aggregates Availability Reliability Machine learning Stochastic systems Power system modeling Machine learning algorithms
Content Type	Text
Resource Type	Article

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