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Mass Storage Systems and Technologies, IEEE / NASA Goddard Conference on (2013)
Long Beach, CA, USA USA
May 6, 2013 to May 10, 2013
ISSN: 2160-195X
ISBN: 978-1-4799-0217-0
pp: 1-5
Hsu-Wan Kao , Computer Science Dept. University of Houston Houston, TX 77204-3010
Jehan-Francois Paris , Computer Science Dept. University of Houston Houston, TX 77204-3010
S. J. Thomas Schwarz , Depto. de Informática y Ciencias de la Computación U. Católica del Uruguay 11600 Montevideo, Uruguay
Darrell D. E. Long , Computer Science Dept. University of California Santa Cruz, CA 95064
ABSTRACT
Proteus is an open-source simulation program that can predict the risk of data loss in many disk array configurations, among which, mirrored disks, all levels of RAID arrays and various two-dimensional RAID arrays. It characterizes each array by five numbers, namely, the size n of the array, the number nf of simultaneous disk failures the array will always tolerate without data loss, and the respective fractions f1, f2 and f3 of simultaneous failures of nf+ 1, nf+ 2 and nf+ 3 disks that will not result in a data loss. As with any simulation tool, Proteus imposes no restriction on the distributions of failure and repair events. Our measurements have shown a surprisingly good agreement with the results obtained through analytical techniques and no measurable difference between values obtained assuming deterministic repair times and those assuming exponential repair times.
INDEX TERMS
Arrays, Reliability, Maintenance engineering, Organizations, Data models, Computational modeling, Analytical models
CITATION

H. Kao, J. Paris, S. J. Thomas Schwarz and D. D. Long, "A flexible simulation tool for estimating data loss risks in storage arrays," 2013 IEEE 29th Symposium on Mass Storage Systems and Technologies (MSST 2013)(MSST), Long Beach, CA, 2013, pp. 1-5.
doi:10.1109/MSST.2013.6558435
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