AHCI

[HONAW]

Hey,

Why is it when I set my motherboard to use AHCI on my Sata drives, the OS will reach a certain stage in startup and crash? I see a fleeting glimpse of the blue screen of death with text on it and the restarts. OS is Windows 7 Home premium 64 bit.

 

[sminlal]

Did you originally install windows with the controller set to IDE emulation mode? If you switch out the mode in an already-installed Windows system it will crash as you describe. Ideally you should configure AHCI mode first, then install Windows.

But there's a Registry tweak you can make to swap modes without requiring a reinstall:

1) Run the Registry Editor (regedit.exe)
2) Navigate to Registry Key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
3) Set the "Start" value to 0 (zero)
4) Navigate to Registry Key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Pciide
5) Set the "Start" value to 0 (zero)
6) Shut down
7) Start up again, but before Windows boots go into the BIOS configuration screens and change the disk mode to "AHCI". Save the new BIOS configuration and restart so that Windows boots.

When Windows starts, it will detect the change, load new disk drivers, and do one more reboot to start up with them.

 

[HONAW]

Thanks a lot. It worked without a hitch! Glad to know I have it working in SATA now instead of legacy ide!


Mike

 

[timmytucker718]

I did this and mine still freezes