I have the same problem.
Motherboard: Asus P5Q Deluxe (ICH10R)
Hard Disks: 1 SSD Samsung 128GB (Windows 7), 2x2TB Seagate LP Green
The two HDD Seagate are set as Raid1.
Read Sequential: 52MB/s
Write Sequential: 132MB/s
If the two HDD are set as normal disk:
Read Sequential...