New Ultra 4 RNDU400 and 3TB Drives

Not a problem as long as I can access them.... cuz I still have issues with the Seagate hdds. I can see them in Windows 7 with SeaTools, discmgmt.msc, Windows Device Manager but not in Seagate's drivedetect.exe (which is in the bootable CD). Also I tried updating the firmware via the bootable CD but it can't see the hdd. I figure it's either a BIOS issue or I need a USB Dos driver for the hdd. Which is which I can't tell. Poking around Seagate's support area gave me a headache. Gives you the runaround with links here and there and everywhere. I can also see the drive using Acronis Drive Monitor and report's the size correctly 3000.59 GB.

I checked the BIOS and under System Configuration | Sata Operation is configured for RAID mode. I tried changing it to ACHI (2 other options available: ATA and Disabled) but a warning is displayed:

Attention! Changing the setting may prevent your operating system from booting or require a reinstall.
Attention! The E-Module and other eSATA devices only function in ACHI or RAID mode.

Also in the Settings | General | System Information it says under Device:
Primary HDD: = 500 GB HDD
Second HDD: = none
Fixed Bay Device: DVD +/- RW
Minicard SSD Device: none
System eSata Device: none
Dock eSata Device: none

Can someone suggest the next steps I should take or what my problem is? BIOS or DOS device driver or something else?

Thanks.