How do we dual boot using Mageia 8 and another OS (like Ubuntu, another Linux version or, yes, even W10) on the M.2 NVME PCIe4 x4?

Would it be better to dual boot using the other HDDs or would loading separately and use BIOS to change when needed?

Thank you.




Asus ROG Strix B550-F MB
Asus TUF RTX 3060 OC Edition 12GB GPU
AMD 7 3800x CPU
32 GB 3200 DDR4 Memory
EVGA G5 850 Watt PSU
2 Seagate HDD 2TB each
Seagate 2280 NVME M.2 PCIe4 Gen 4 - 500 GB
DVD burner
Card Reader

If the M.2 is fully supported by bios as a bootable device and that may include uefi mode only in some sysetems then you should be able to install an os as if it were a hard drive. This would also assume that all the drivers for any storage are there.

TOSHIBA THNSN5256GPU7
NVMe M.2 SSD by PCIe Gen3 X4

I run Windows 10, and 4 Linux on the 250GB drive above. They all dance gracefully.

What are the steps involved to create the dual boot? Would someone be able to reply with a link if the question has already been asked, please? My Search button gives me an error.

Thank you.

Install each to a separate partition. Are you using UEFI? That will simplify things particularly in regard to bootloader. The link below explains dual booting windows and Ubuntu. The process is basically the same for each distribution. What part of the process specifically, do you not understand? Have you not done it before? Have you done an online search?

https://help.ubuntu.com/community/UEFI

This is one example of how to install dual boot.
There are many examples of your question and the answers already available on the internet with a quick search.

All my installations are multi-boot. The vast majority of those not including RAID have only one HDD, SSD or NVME. I have 5 PCs as such on UEFI, with 2 on NVME and 3 on 2.5" SSD.

To make multiboot on NVME (or really any UEFI PC) easy, I suggest to have only the first Linux installation include a bootloader. That first installed bootloader can boot all other distros, and Windows if desired. I suggest also to do all partitioning for all planned installations before installation begins for the first. Second best is for the first installation to do all the partitioning, so that for each additional one it is only necessary to specify which partition(s) or LVM filesystems to utilize, and format as required, so that you won't be subjected to complicated surprises from installations after the first.

If you expect ever to install more than one version of a distro, or more than one Ubuntu-based distro, e.g. Mint, before beginning installation of each additional one you should modify /etc/default/grub's GRUB_DISTRIBUTOR= line in the previous distro(s) to make it unique. If more than two, each additional one should also have this. E.g., for openSUSE, which always defaults to GRUB_DISTRIBUTOR="opensuse", make the first GRUB_DISTRIBUTOR="suse152", the next, GRUB_DISTRIBUTOR="susetw", the third, GRUB_DISTRIBUTOR="suse153", and so on. This way minimizes the chance a subsequent installation will usurp the bootloader of a prior installation.