RAID Not Performing?

[Wizardskills]

Hi all,

I have set up 2 seagate 320Gb HDD's in RAID 0 using my motherboards RAID controler. The RAID seemed to be working fine, but not giving me much of a performance increase so i decided to test its speed against an identical single drive. Results below (RAID drive is the second graph)

Now there doesn't seem to be a massive differance in the numbers. Is this normal or have i set it up wrong?

 

[Wizardskills]

What size have you set the RAID0 to in the RAID BIOS?

I have mine at 32kb, as i tried 16kb and 64kb and found 32 to be the best.

Also, are you using the Gigabyte RAID or the Intel. With Intel, if you go into the Intel Storage Matrix program, you can turn on write-back caching which can improve speed.

I set it to the standard one, which i think was 128kb ont he Gigabyte RAID