You can NOT have FAKE RAID on partitions it is whole disk or nothing. You can have software RAID on selected partitions. But that is not compatible between Windows and Linux!!!
Real Hardware RAID is the best solution but real starts at about $200.00 per board. And you have to be carefule because some boards are actually FAKE RAID.
If you want speed go to SSD. That is faster that RAID 0 ing two disks
I have never understood why people think RAID is some magic solution it is not. It is great if you want 99.999 uptime (RAID 1) but except for real hardware type it is just a pain.