IOMeter is another open source synthetic benchmarking tool which is able to simulate the various loads placed on hard drive and solid state drive technology.
We set IOmeter up (as shown above) to test both backup and restore performance on a 100GB partition.
The TS-251B had no real problems dealing with our backup/restore tests, showing pretty good consistency across the arrays, averaging 96.41MB/s for the backup test and 102.08MB/s for the restore runs.