I have this problem on another Giga MB. Here is my solution. Maybe it can help some others.
RAID system build procedure for Gigabyte GA-990FXA-UD3
History. I have had nothing but trouble building RAID systems using the above Gigabyte Motherboard. I have now built about 6 of these systems and while I like the MB very much, there appears to be a serious problem with the firmware or with the build procedure when it comes to setting up a system with a bootable RAID arrays.
The Problems: 1) In some cases, after I set up the RAID array and then start to install Windows 7, the Windows 7 installer fails to request the Gigabyte RAID driver for the array. 2) In other cases, I have had the system be unable to read the Windows 7 install disk on the SATA drive once I set up the RAID array. 3) Sometimes I have been quite unable to get back to the RAID settings (CTRL-F) after being unable to install Windows 7. After about the fourth episode of this, I have used the following procedure successfully.
The Procedure:
1) I used Acronis or Reflect imaging software to take a bootable clone image of an operating system on one of the already built systems with a GA-990FXA-UD3 motherboard and Windows 7 Pro and a RAID array working..
2) I install this disk drive in the new computer and connect it to ports 4/5 in IDE mode. The DVD Sata drive is connected to port 5. I set the BIOS to boot only from the drive on SATA port 5.
3) Then I connect the 2, 3, or 4 drives that I intend to use in RAID mode to ports 0,1,2,3 as appropriate. These ports are set to RAID mode in the BIOS.
4) BEFORE doing step 3, I connect power up to the RAID drives but DO NOT connect the SATA cables to the drives. Then I boot up to make sure the boot drive works successfully. Then I shut down.
5) Then I connect up the SATA cables to the (to be) RAID drives on ports 0,1,2,3 as appropriate.
6) Then I start the boot up and enter CTRL+F at the proper time to get into the RAID BIOS. I set up the RAID array as desired. Then I exit the RAID BIOS and continue the boot into Windows 7.
7) When I get booted up, I go to Control Panel-Administrative Tools-Computer Management-Storage-Disk Management. I then select the new RAID drive and initialize and format it.
8) Then I go back to the Acronis or Reflect program and CLONE the single drive on port 4 (usually drive C) onto the new drive (usually drive E). When the clone operation is finished, DISCONNECT the single boot drive used to clone the array and set the BIOS to boot from the RAID array. You should be up and running.
9) After the RAID array is up and running, you will have to input a new Windows 7 key as the Windows 7 OS on the RAID array will be the one being used on the computer from which the original clone drive (step 1) was made.
I hope this works for you as easily and consistently as it has for me. My final word is that the folks at GigaByte seem to have no understanding of why I have problems getting a RAID array running on their MB. I guess I just have a misunderstanding somewhere in the process. In any case, the above process gets me up and running in about 10 hours of elapsed time with about one man-hour of labor so I am not displeased. The 9 hours is image copy time, first for the original clone drive and then to copy the cloned drive image onto the final RAID array. The Gigabyte procedure WOULD be faster IF I could get it to work!
Joe Mehaffey
W2JO