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Switching RST to AHCI without losing data

My laptop switched from AHCI to RST on its own (probably after a Windows update) and now I cannot boot my Kubuntu anymore. Live sticks also cannot access the drives. When I try to switch it back in the UEFI settings, it tells me that it will wipe the drive to do so.

Is this message correct? How can I change it back without losing all my data?

The device in question is a Lenovo Ideapad 720-15ikb with Kubuntu and Win10 dual boot.

yum13241 ,

The last time I remember hearing of AHCI was when SATA was still new and IDE (or ATA) was king.

zeroblood ,

My acer laptop did the exact same thing for unknown reasons. When I switched it back to AHCI Arch (btw) booted again but windows broke and I managed to fix it with a Windows live usb. I think I had to use bcdboot and generate a new bootloader.

trones ,

If you have access to an external drive as big or bigger then the laptop drive, boot SystemRescueCD and ddrescue it as a backup, just to be safe. I personally haven’t had it actually wipe a drive, basically it’s saying switching might render it unbootable if the right drivers aren’t in place.

I always back up first just to be safe though, worst case I waste a little time.

squaresinger OP ,

I only got an old external USB2 drive. Backing up >1TB over that will take some time^^

Thanks for the suggestion though!

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