On Thu, Nov 21, 2019 at 09:51:03PM +0100, Pascal Hambourg wrote: > Le 21/11/2019 à 20:46, Chris Green a écrit : > > > > However trying to boot 19.10 from /dev/nvme0n1p2 fails with "No such > > device c6ca1c2d-4837-48b9-8fa6-1ef47251d7b7" whereas booting it from > > /dev/sda1 (a spare SATA spinning disk) boots OK. The device UUID is > > correct for /dev/nvme0n1p2 so I guess grub isn't able to read the NVME > > SSD for some reason. > > Of course. GRUB uses the BIOS for disk access, but the BIOS cannot manage > the NVMe SSD. > > > How do I get over *this* issue! :-) > > As explained before : you must put Ubuntu 19.10's /boot in a location which > the BIOS can see, such as the SATA SSD. But DO NOT share the same /boot > between both Ubuntu's, else GRUB won't be able to tell which kernels belong > to which system. > OK, yes, I see. So I need to put the /boot for /dev/nvme0n1p2 on /dev/sda1 or similar. How does one configure that though? I.e. if I clear out my 'spare' /dev/sda1 and just put a /boot on it how do I tell update-grub to configure grub so that the /boot is on /dev/sda1 but the rest of the OS is on /dev/nvme0n1p2?
-- Chris Green
