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28 March 2024
 
  » arxiv » physics/0411188

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Multi-Terabyte EIDE Disk Arrays running Linux RAID5
D. A. Sanders ; L. M. Cremaldi ; V. Eschenburg ; R. Godang ; M. D. Joy ; D. J. Summers ; D. L. Petravick ;
Date 19 Nov 2004
Subject Data Analysis, Statistics and Probability; Computational Physics; Instrumentation and Detectors | physics.data-an hep-ex physics.comp-ph physics.ins-det
Affiliation University of Mississippi-Oxford, Fermilab
AbstractHigh-energy physics experiments are currently recording large amounts of data and in a few years will be recording prodigious quantities of data. New methods must be developed to handle this data and make analysis at universities possible. Grid Computing is one method; however, the data must be cached at the various Grid nodes. We examine some storage techniques that exploit recent developments in commodity hardware. Disk arrays using RAID level 5 (RAID-5) include both parity and striping. The striping improves access speed. The parity protects data in the event of a single disk failure, but not in the case of multiple disk failures. We report on tests of dual-processor Linux Software RAID-5 arrays and Hardware RAID-5 arrays using a 12-disk 3ware controller, in conjunction with 250 and 300 GB disks, for use in offline high-energy physics data analysis. The price of IDE disks is now less than $1/GB. These RAID-5 disk arrays can be scaled to sizes affordable to small institutions and used when fast random access at low cost is important.
Source arXiv, physics/0411188
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