NDLI: Using a shared storage class memory device to improve the reliability of RAID arrays

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Using a shared storage class memory device to improve the reliability of RAID arrays

Content Provider	IEEE Xplore Digital Library
Author	Chaarawi, S. Paris, J.-F. Amer, A. Schwarz, T.J.E. Long, D.D.E.
Copyright Year	2010
Description	Author affiliation: Department of Computer Science, University of Houston, TX 77204-3010, USA (Chaarawi, S.; Paris, J.-F.) \|\| Department of Computer Engineering, Santa Clara University, CA 95053, USA (Amer, A.) \|\| Department of Computer Science, University of California, Santa Cruz, 95064, USA (Long, D.D.E.) \|\| Depto. de Informática y Ciencias de la Computación, Universidad Católica del Uruguay, 11600 Montevideo, Uruguay (Schwarz, T.J.E.)
Abstract	Storage class memories (SCMs) constitute an emerging class of non-volatile storage devices that promise to be significantly faster and more reliable than magnetic disks. We propose to add one of these devices to each group of two or three RAID level arrays and store on it additional parity data. We show that the new organization can tolerate all double disk failures, between 75 and 90 percent of all triple disk failures and between 50 and 70 percent of all failures involving two disks and the SCM device without incurring any data loss. As a result, the additional parity device increases the mean time to data loss of the arrays in the group it protects by at least 200-fold.
Starting Page	1
Ending Page	5
File Size	117637
Page Count	5
File Format	PDF
ISBN	9781424489138
ISSN	21577250
e-ISBN	9781424489121
DOI	10.1109/PDSW.2010.5668041
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance evaluation Computers Organizations Maintenance engineering Arrays Reliability Manganese
Content Type	Text
Resource Type	Article

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