We tested the TS-251B with a number of scenarios that it may face in the real world. The settings for these scenarios are as follows.
512MB file size, 16KB Block size, 80% Read 20% Write 100% Random, I/O queue depth 128
1GB file size, 16KB Block size, 100% Read 0% Write 100% Random, I/O queue depth 64
2GB file size, 4KB Block size, 90% Read 10% Write, 90% Random, 10% Sequential, I/O queue depth 128
160GB file size, 64K Block size, 98% Read 2% Write, 100% Sequential, Boundary: 4K, I/O depth 64, Threads/Workers: 8
Video On Demand
160GB file size, 128K Block size, 100% Read, 100% Random, Boundary: 4K, I/O depth 512, Threads/Workers: 8
With our workload tests, the RAID 1 performance holds up pretty well against the RAID 0 performance with the exception of the File Server trace.