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 AS4004T had no real problems dealing with our restore/backup tests, although the write performance in RAID 6 with a 10GbE connection lagged behind all the other arrays using the fast network connection. With a 1GbE connection it was while the disks were in a RAID 5 array that the slowest write speed occurred.