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How Can I Dual Boot Ubuntu with Windows 11 Without BIOS Changes?

October 25, 2025 3 answers
Asked by TechieTurtle23
I'm trying to set up a dual boot system with Windows 11 and Ubuntu 25.10 on my two SATA SSDs, but I've run into a bit of trouble. I managed to boot into Ubuntu from a USB created with Rufus without any issues. However, during the installation, it prompted me to disable Intel Rapid Storage Technology (RST), so I went into my BIOS and switched the setting from RAID On to AHCI. After doing that, I unplugged the USB and attempted to boot Windows, but it wouldn't start. When I reverted the BIOS back to RAID On, Windows booted up normally. Now, I'm looking for a way to disable RST without preventing Windows from booting. Is there a way to achieve this without constantly toggling BIOS settings? Also, do I absolutely need to have RST disabled to run Linux, or can I switch back to RAID after the installation and boot into both OSs freely? I haven't installed Ubuntu yet because I want to sort this out first. For reference, I have a DELL Precision 3630 motherboard. Any advice would be greatly appreciated!
AHCI BIOS settings dual boot RTS Tutorial ubuntu Windows 11

Answers

UserFriendlyGeek
Before you dive into installing Ubuntu, make sure Windows is configured properly for AHCI. Booting into Safe Mode while changing the BIOS is a must to avoid any conflicts. Here's a link that might be useful for you: [Switching Windows from RAID to AHCI](https://support.thinkcritical.com/kb/articles/switch-windows-10-from-raid-ide-to-ahci). This way, you won’t have to mess with BIOS settings each time you switch between OSs.
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CuriousCoder88
I just realized that Ubuntu 24.04 supports RST, so using that version might be easier for you. It could save you the hassle of switching BIOS settings every time!
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HelpfulHacker91
Linux generally has issues with RST, so it’s best to switch to AHCI for your installation. You'll want to configure Windows to use an AHCI driver first; this involves booting into Safe Mode and making some registry changes. There are plenty of guides online that can help you through it. Once that's set, you should be able to boot into both OSs without future BIOS tinkering. Good luck with your setup!
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