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 AS6104T shows pretty good consistency throughout the range of RAID arrays it supports with performance getting close to 100MB/s mark with the exception once again of RAID 6 where the the performance dips in both writing to the NAS and reading from it.