I have 15 computers running with your motherboard X7DWA-N. One of the units we were going to use as a backup unit. I have 4 2TB hard drives that I want to install along with the OS drive. The BIOS will only accept 4 SATA drives and one of them is a DVD. I need to get the other two SATA drives to be seen.
Under IDE mode, it will show 4 drives list inside the BIOS setting but if you need to have all 6 drives support on the ESB2 south bridge chipset as JBOD then select AHCI mode inside the BIOS setting. It will not show the drives inside the BIOS but it will list all drives at post display screen.