Change to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStorV\ does not survive reboot

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It seems that any changes to 0's Data column value in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iaStorV\StartOverride or HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\storahci\StartOverride do not survive Windows 10 reboot. How do I make them do survive?

Why do I need this?

In an attempt to install Arch or Ubuntu beside the factory-installed Windows 10, in both cases I have hit the problem of Intel RST

Specifically, the live Arch does not see the SSD if I enter fdisk -l, whereas Ubuntu's install process tells me something along the lines "you cannot have RST".

What I've tried so far

Therefore I surfed the web and find out that the solution seems to be switching to AHCI, so I tried setting that from the UEFI BIOS of my Dell Vostro 5590; upon doing so, unfortunately, not even Windows 10 boots, but it bothers me with the hateful smiley-BSOD with an INACCESSIBLE_BOOT_DEVICE error.

So I came across this, which clearly states that the aforementioned change in the BIOS should be done after changing the Registry.

However, it turns out that those changes do not survive a reboot, therefore I still get the hateful BSOD upon changing to AHCI in the BIOS.

Any suggestion on how to proceed?

Solution 1:

For your problems with booting Windows in AHCI mode, try this procedure:

• Go back to IDE mode and restart Windows

• Launch the Command prompt as Administrator

• Type the following in the command prompt and press Enter:

    bcdedit /set {current} safeboot minimal
  

• After getting a message of operation successful, restart the computer

• In the BIOS enable AHCI and save the settings

• The computer will boot in safe mode and install all necessary drivers

• Launch the Command prompt as Administrator again and execute:

    bcdedit /deletevalue {current} safeboot
  

• Restart the computer again. This time, Windows should boot with AHCI enabled and without any problems.