@Steve, that 2TB partition you are seeing is HDtune not reporting the array correctly. This is was done on a just formed 8 drive array, no partitioning
The HDtach sees it correctly and reports the same results while doing its read test.

I am concerned as to why my reads are so slow, as you can see even in Raid0 they are not that good using 64k block test. Any guesses why it is behaving this way? Just about 50% than just a single drive.

I've done some Raid0 test all are with 256k stripe.
Here are the shots an a summary table:


HDtune 64k tests



HDtune 8MB tests


HDtach reads just for comparison:




What are your thoughts now?