But user guide of P5Q says "When using one hard disk in Normal Mode,connect the hard disk to the SATA-E1(orange, port ) connector on the motherboard.)
So I have just one HDD and I want to install OS
Even user guide says " Normal mode allows you to disable the Drive Xpert function and use the two STAT (SATA-E1 and SATA-E2) connectors as the other onboard SATA connectors.)