ASUS P9X79 RAID mode + Win7 blue screen

Create hardware RAID1 volume from 2x250GB drives for use as primary backup volume.  I would like this volume to be presented as a single drive to the OS.

I am having issues with Windows starting when the SATA mode in the BIOS is set to RAID as opposed to AHCI.  Regardless if there is a RAID volume created or not, once I switch to RAID mode in the BIOS I get a blue screen and Windows will not completely load (bsod is not immediate).

Both drives are currently plugged into the same "bay" (single port on mobo with 2x SATA2 slots).  I originally had them plugged into separate what I am calling "bay"'s to potentially increase throughput, but that apparently neither helps nor hurts the current situation.

Every combination available works fine if SATA mode is set to AHCI
No combination works if SATA mode is set to RAID

What appears to be the same problem occurs whether or not the Intel RAID software is installed, even though I am trying/hoping to control this via hardware.

Where we stand:
With both drives initialized in Disk Management while in AHCI mode in the BIOS I am able to create a RAID1 volume.  This however is not the desired solution.
LVL 21
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

did you use the Intel® Rapid Storage Technology Option ROM utility as described on page 4-20 of the manual?
see :
noxchoGlobal Support CoordinatorCommented:
Your system does not have RAID controller drivers. Install the drivers and then try to change to RAID mode.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
PapertripAuthor Commented:
@nobus yes that utility is available when BIOS is set to RAID mode.  Windows blue screens regardless if there is a RAID volume created or not.

@noxcho I have the Intel C600 ACHI/RAID driver installed from the ASUS website, and it is currently working just fine in AHCI mode.
Discover the Answer to Productive IT

Discover app within WatchGuard's Wi-Fi Cloud helps you optimize W-Fi user experience with the most complete set of visibility, troubleshooting, and network health features. Quickly pinpointing network problems will lead to more happy users and most importantly, productive IT.

PapertripAuthor Commented:
noxchoGlobal Support CoordinatorCommented:
What is the BSOD exception number you get?
PapertripAuthor Commented:
After a few more hours of trial and error I was able to resolve this myself.

Even though the boot drive was not a RAID member, the OS still needed to be installed with the RAID driver if any additional drives were ever destined to be in a RAID.

Before re-installation of the OS I changed the SATA mode to RAID and provided the RAID drivers to the Windows installer via a thumbdrive.  After that everything worked as intended.
that's how it is always done...
PapertripAuthor Commented:
If it is such an obvious issue, I would've expected a different answer considering my question mentions that Windows is already installed and working fine in AHCI mode but blue screens in RAID mode, indicating that the OS was already installed and done so in AHCI mode.
the reason is the OS needs the driver for the disk controller
you can provide it at install time, or install it later
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.