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Validation of Large Zoned RAID Systems

Abigail Lebrecht, Nicholas J. Dingle, William J. Knottenbelt

National Workshop Paper
24th UK Performance Engineering Workshop (UKPEW 2008)
June, 2008

Building on our prior work we present an improved model for for large partial stripe following full stripe writes in RAID 5. This was necessary because we observed that our previous model tended to underestimate measured results. To date, we have only validated these models against RAID systems with at most four disks. Here we validate our improved model, and also our existing models for other read and write configurations, against measurements taken from an eight disk RAID array.

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