Some systems will have the Windows operating system installed using RAID drivers including the Intel Rapid Storage Technology. SSD drives typically perform better using AHCI drivers. There is in fact a way to switch operation from either IDE / RAID to AHCI within Windows 10 without having to reinstall. Here are the steps:
- Click the Start Button and type cmd
- Right-click the result and select Run as administrator
- Type this command and press ENTER: bcdedit /set {current} safeboot minimal (ALT: bcdedit /set safeboot minimal)
- Restart the computer and enter BIOS Setup
- Change the SATA Operation mode to AHCI from either IDE or RAID
- Save changes and exit Setup and Windows will automatically boot to Safe Mode.
- Right-click the Windows Start Menu once more. Choose Command Prompt (Admin).
- Type this command and press ENTER: bcdedit /deletevalue {current} safeboot (ALT: bcdedit /deletevalue safeboot)
- Reboot once more and Windows will automatically start with AHCI drivers enabled.
Comments (13)
There must be no space between bcdedit and the forwardslash "/".
The term in brackets with "ALT:" describes an alternative, there is no need to type both commands at the same time.
Correction. There *must* be a space between bcdedit and the forward slash. There is no command called "bcdedit/set" (for good reason)
Good information and thank you - it worked nicely. :)
this works, thanks
I used the ALT commands
Ummm... don't you think going to msconfig and just checking Safe Boot or un-checking Safe Boot is an easier way to, I dunno... make it so people don't mess anything up?
Don´t work. After set to AHCI in BIOS and save changes, just blinking cursor and don't boot to safe mode.
This approach worked on my Windows 10 machine - which should have been set up with AHCI in the first place since all of my drives are SSD. However one must know that it may take several reboots for your D: disk to re-appear and become stable. In the first reboot, my data appeared to have been lost. After swearing at the computer several times, I decided that perhaps a reboot would help the situation. Fortunately after 2 more reboots, the disk re-appeared and all of the data was intact.
Thank you for these steps to switch my computer from RAID to AHCI.
Question to those who have tried this method:
Have you executed this procedure on Win10 Home or Win10 Pro?
Added a Samsung 970 Evo (500GB) NVMe M.2 alongside the existing HDD in new Dell Inspiron 5570. Samsung software couldn't load the drivers because drives configured for RAID. I set AHCI in BIOS and W10 (home) wouldn't boot up. Returned to BIOS to RAID and rebooted successfully. Found this thread and tried it. Yes, it worked! It took a bit of work to manipulate the the drive letters afterwards but got there eventually. Thank you for the information.
I have RAID 0. When I try the above procedure my computer does not reboot to safe mode. I get a black screen with “Missing operating system”. Can anybody help? Thanks
Dammit Bob!
I had a really odd experience attempting this on Windows 10, but I finally figured it out:
When I switched to AHCI and got to the safeboot menu, my keyboard wouldn't work. If I tried to get to the keyboard settings nothing happened. I was able to get to the Command Prompt terminal via the 'Windows Systems' tab in the Start Menu. Once I had opened the Command Prompt, I could type in it using the on-screen keboard (Start Menu -> Settings -> Ease of Access -> Keyboard (scroll down and it's on the left) -> On-Screen Keyboard). Then I typed bcdedit /deletevalue safeboot (there didn't seem to be a way to use curly brackets). Then I Rebooted, and found that I had left Safe Mode, and everything was back to normal :)
It's one hell of a work-around, but hopefully this helps somebody!
Thanks @Evan! The keyboard thing also happened to me, but using the virtual keyboard did the job. If you press the shift key you'll be able to use curly brackets!
Thank you very much! I am running Server 2016 and didn't realize my Intel board was in IDE until I tried to run two SSD's in Raid0 and was only getting about 400MB/s. I switched to AHCI and was getting "Inaccessible boot device". I used the method described above and it's working now! 1100MB/s.