It's called a hard disk drive (HDD) or hard drive.
Have you tried XBench, it has a HDD benchmark in it too?
Have you tried bigger file size with AJA System Test?
And if you copy files to you HDD, or just duplicate them, does it really take that long as AJA System Test lets you believe it is? You can also take a look at Activity Monitor while a copying/duplicating process is in .... process.
And does the AJA System Test last 325 seconds (with the 128MB file) or so?
And what HDD do you have in your MBP? I had a 500GB 5400rpm drive and AJA System Test reported 70MB/s read and write speeds.