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.
QNAP's TS-228A had no problems dealing with our backup/restore test in either RAID array, with an average transfer rate of 100.19MB/s across the arrays.