i have a asus p4c800-e deluxe with the promise 20378 fasttrak controller. at this moment i have 2 wd sata raptors 36.7 gig in raid 0 on the ich5r southbridge controller with a 80 gig wdse ata100 for back up. i recently ordered 2 wd ultra ata 100 40gig 8mb hdds i am wondering if i can use these drives along with the 2 sata drives to create a raid 0+1 array with the promise controller. i am wondering if the interface difference between the sata drives and the ide drives will cause it to slow down sig. will this even be stable . how would it compare in performance with the raid 0 setup i have on the southbridge now all info on this would be greatly app.