RAID, supports 0/1/5/10. You are trying to do RAID 10 so this can be done, just finding the cause will be trouble.
Beleave me I'll keep trying to find a solution as it realy drives me crazy...
I also made some photos during installation process and the settings of thge RAID array, so I'll upload them soon.
I just uploaded some screenshots/photos in google drive (201401A0.rar)
with the settings and progress during installation with the error messages.