Two of THESE in a RAID 0. Is it on par with expected performance?
Here are three read tests with HD Tune:

Is it what you would expect?

I can't do a write test because it says this:

I don't know why

Thanks in advance

EDIT: Also... I have the benchmark speed set to second to fastest

About what I would expect. What are you doing with your array?
The transfer rate is good, the access time is slow.
Unless you are spending a lot of time moving big files, a single fast drive with > 10ms access time would "feel" a lot faster.

well i just ran the same test with my seagate 750gb 7200.11 hard drive and my results are:

min trasfer rate of 51.8mb/sec
max is 108.3 mb/sec
avg is 85.7 mb/sec
access time 12.7 ms
burst rate 141 mb/sec
cpu usage 2%

ran another test on my 500gb seagate 7200.11 hard drive and the results were pretty much the same minus like 3mb/s in the transfer rates.

don't have raid so i can't test that. bt this gives you some idea of comparing one hd of mine to your array.

I use the array to store a lot of .iso's, lots of installed games and movies. Is access time supposed to be slower in relation to a single drive? ):