1. See if all drives are recognized in the BIOS.
1. If not all are recognized, look for a setting named IDE Native, IDE Legacy or IDE Mode and enable it.
2. Another posible solution is to reinstall the SATA drivers.. look for the driver updates in the manufacturer website, support and downloads.
3. To diagnose possible SATA drive problems: Switch around the SATA cables on the motherboard. EG; interchange cable 1 with 2 and 3 with 4. If drive 2 works on 1 and 1 doesnt work on 2, and the same between 3 and 4, the problem may be in the motherboard, but if drives 2 and 4 dont work on connectors 1 and 3, the drives are probably bad or going bad, and you may be able to make them work by enabling IDE Mode (IDE Native, IDE Legacy or whatever it's named in your BIOS).
thanks I'll try this and keep you posted. bazza