if you want a striped raid array I would follow my instructions for dell b in previous post and then create a windows full metal backup to external disk. confirm/validate backup is good.
boot to raid utility ctr+I
wipe and create striped raid
boot windows from usb, use recovery tools on windows setup, load sata drivers for raid
then restore backup on new striped array
boot to raid utility ctr+I
wipe and create striped raid
boot windows from usb, use recovery tools on windows setup, load sata drivers for raid
then restore backup on new striped array