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.
