I tried setting my BIOS to AHCI but still same problem
Here is the last 2 lines before the Still waiting for root device

IOATAController device blocking bus.
ApleGenericPCATADriver : CMD 0x1f0, CTR 0x3f4, IRQ 14

Heres my specification:
Core 2 duo E7500
2GB DDR2 667
1 320 Seagate SATA(With windows 7 Installed)
1 1TB Seagate SATA(COntains 2 partition, The 2nd partition has been created without reformating. So it is RAW and it is set "Make Partition Active".
Asus P5SD2-VM Mobo