I had a dual boot setup with Win10 & 20.04 working well on a SSD. I hadn't booted into Win10 in 5 months, and was pretty sure the Winupdate was going to blow away my multiboot as it had on other PCs. So reading forums like this one, said the best way to protect my Linux installation was to have Ubuntu on a separate drive.
So got an NVMe drive for Cyber Monday, want to use that as my primary Win10 drive. Then want to multiboot between the new Windows installation on the NVMe and the original 20.04 installation on the SSD. The old Win10 install on the SSD is still intact, but will reformat that for additional Win10 space.
In theory, my thought was to create another dual boot installation on the NVMe, installing a fresh 20.04 installation on some space on the NVMe, then repoint grub details / UUID to the old installation (and ultimately delete the “new” installation thereafter).
Would that work?
Is that the best way?
Appreciate any insight taking the theory into pragmatic steps to make it work. Thank you.
sudo update-grubto add Windows to grub menu. You may need to houseclean old UEFI entries with efibootmgr. Note that grub only boots working Windows, so make sure Windows fast start up is off and Windows updates will turn fast start up back on.