Actually I now see the all 6 SATA drives listed, but they say "not detected". If the HDDs are connected to the red SATA ports, try connecting them to the first two grey SATA ports which are the native Intel controller.
Your HDDs are not going to need to be connected to the Marvell SATA 3 ports.
ASUS Rampage IV Formula; 4930K @ 3.9GHz; Corsair Dominator GT (CMT16GX3M4X2133C9) @ 2133; Corsair H100 Cooler; 2 x AMD Radeon 7970 @1100/1500; Samsung 840 EVO 1TB SSD; Corsair AX 1200 PSU; Sound Blaster Titanium HD; Corsair Carbide 500R Case; Win7 64-bit Did you try connecting just one drive?
If one drive has gone bad it could be preventing the detection of all of them.
My first HDD is connected to SATA 1 and the second one is connected to SATA 2.Your Windows 8.1 drivers for it may suffice, but upgrade with caution.*Choose Windows 10 from drop-down menu Z99 Motherboards 1. MAXIMUS IVGENE-Z/ GEN3 – NOQ67 / H61 Motherboards 1. I dont think i can access the hard drives individually since they functioned in the raid0 mode since the begining. You can create a new set safely as long as you don't choose to erase data during the process.Creating a RAID set option all it does is writing metadata at the end of the disk so that the controller can know which drives belong to which set, metadata version, etc etc.I also have dual 1TB hard drives (Western Digital).