New Build - Mobo Doesn't Recognize SATA Drives

I'm building a new PC with the Gigabyte GA-X38-DQ6 motherboard, Intel
E6850 CPU, 2 x 2GB OCZ memory, 3 Seagate SATA hard drives, and 2 DVD-
RW drives. I want to run the 3 hard drives as a RAID-5 array.

Problem: I cannot get the system to recognize any of the 3 hard
drives.

When I turn the system on, I get one short beep and POST starts. I
get the Gigabyte color screen with instructions for entering BIOS
setup, ROM flash, etc. which goes away in a few seconds. Then I see
this:

Port 00 No device detected
Port 01 No device detected
Port 02 No device detected
Port 03 No device detected
Port 04 CD ROM LITE-ON DVDRW LH-20A1L
Port 00 CD ROM LITE-ON DVDRW LH-20A1L

After more typical POST stuff, it finally says: DISK BOOT FAILURE,
INSERT SYSTEM DISK AND PRESS ENTER.

Assuming the problem is in CMOS setup, I reboot and enter CMOS setup.

The first category is "Standard CMOS Features." The first thing in
Standard CMOS Features is a list:

IDE Channel 0 Master [None]
IDE Channel 0 Slave [None]
IDE Channel 1 Master [None]
IDE Channel 1 Slave [None]
IDE Channel 2 Master [None]
IDE Channel 3 Master [None]

I go to the first line, highlight "[None]" and hit Enter.

The next screen shows this:

IDE AUTO-DETECTION [Press Enter]

I press Enter, a small window says: "Detecting Hard Drive..." and then
I'm back to the same screen with nothing changed.

The next line says: IDE CHANNEL 0 MASTER [AUTO]

Since Auto doesn't work I tried the other two choices - None and
Manual - each time rebooting with no success.

Back at the main CMOS setup screen, I go into the second option,
Advanced BIOS features. Nothing there seems pertinent.

Back at the main CMOS setup screen, I go into the third option,
Integrated Peripherals.

The first line under Integrated Peripherals is:

SATA RAID/ACHI MODE [RAID]

The other options are ACHI and DISABLED - I tried them both without
success.

The second line is:

SATA PORT0-3 NATIVE MODE [ENABLED]

I tried DISABLED without success.

So I'm completely stuck.

A few other points:

1. I tried different SATA cables without success.
2. The 3 SATA hard drives are brand new. I can imagine one bad one
but not three.
3. I switched the power cables between the DVD drives and the SATA
drives without success.
4. The SATA drives seem to be spinning when the PC powers up.
5. I tried plugging the SATA cables from the DVD drives into the ports
that the hard drives were in and the PC recognizes them in every
possible port.
6. I tried the SATA hard drives in the ports that the DVD drives were
in with no success.

Could there be a problem with the motherboard?

Thanks in advance for any help.

farno
.

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