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OWC Thunderbay 4 with Four OWC SSDs in RAID-5
RAID-5 using SoftRAID 5
Results shown are real-world throughput through the file system API (not unachievable driver-level throughput).
The “Single” results configured all four SSDs in one Thunderbay 4 enclosure. The “Dual” results used two Thunderbay 4 enclosures with two SSDs each. Each enclosure was on a different bus on the 2013 Mac Pro.
Single: 648/1108 write/read MB/sec (4 SSDs in 1 enclosure)
Dual: 689/1258 write/read MB/sec (4 SSDs in 2 enclosures)
The performance is superb in either configuration, but even RAID-5 benefits from the dual enclosure setup. Write speed is much lower than read speed (typical for RAID-5), but it is well beyond what most applications can use Read speed is a match for the internal Mac Pro flash drive so to have that speed with fault-tolerance is very impressive.
Speed might be lower with incompressible data, as per Sandforce-based SSDs, but there is more than ample performance here.