Hybrid Redundancy System New Approach to SSD Redundancy

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Publish Date: 
Monday, September 19, 2011
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Abstract: 

Solid State Drives (SSDs) utilize a large number of flash devices. Flash redundancy might be needed to ensure high data reliability and availability. Meanwhile, legacy Redundant Array of Independent Disks (RAID) implementations are often employed to ensure greater overall reliability and performance at the array system level. By combining SSD-level redundancy with RAID-level redundancy, higher overall reliability and performance can be achieved than when utilizing these techniques separately.

Learning Objectives

Analyze the performance/endurance/cost characteristics of legacy RAID schemes
Analyze the performance/endurance/cost characteristics of internal SSD redundancy schemes
Analyze the performance/endurance/cost characteristics of combined RAID+SSD redundancy schemes