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-328 had no problem dealing with our backup/restore test, averaging 101MB/s for the backup test and 100.1MB/s for the restore test across the three arrays.