The issue is that if it's not needed (ie not detected to be needed your AHCI controller gets switched off)
OK -heres what you do- AND IT WON"T BORK your install
|This issue occurs if the AHCI driver (Msahci.sys) in Windows 7 and Windows Vista is disabled.
This driver must be enabled before you change the SATA mode of the boot drive.
1. Exit all Windows-based programs.
2. Click Start, type regedit in the Start Search box, and then press ENTER.
If you receive the User Account Control dialog box, click Continue.
3. Locate and then click the following registry subkey:
4. In the right pane, right-click Start in the Name column, and then click Modify.
5. In the Value data box, type 0, and then click OK.
On the File menu, click Exit to close Registry Editor.
6. Reboot and change to AHCI in BIOS
[Edit] Nice one simpletech- beat me to it +1
Took me longer as I was trying to find the original MS kb- generally when advising people to go mucking about with their registry I always like to go with the MS source.
[EditII] How rude of me..what I meant to say...
Nice find Simpletech- great contribution and welcome to OCN
Good to have ya
CheersEdited by SpcCdr - 1/12/10 at 5:35pm