grub missing os

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https://bbs.archlinux.org – Part of what you are saying I agree with.  It is possible we are misunderstanding one another.  I am only talking about BIOS grub, as I haven't delved into UEFI yet.  Yes I agree that you should have a primary grub that boots other distros.  However, how do you boot those other distros in a multiboot setup?  I have seen 3 methods described for BIOS boot (not counting GPT).1) Chainload another distro (worked well in the past, but has problems with grub2 because of image sizes).2) Use a few lines plus configfile in /etc/grub.d/40_custom to boot another distro.  (HowTos)