Hi, I have a gentoo system, and I use it a lot, however, sometimes I boot into ubuntu. I want grub to have an an option where it boots from ubuntu's grub. I loaded grub2 into /dev/sdb1, so my normal bootloader was untouched, I made grub boot into /dev/sdb1, by doing this:
Well it worked, but when I was using grub-install, it said that booting into a partition is not the best idea, and that it uses blocklists which are unreliable. Is there a better way of doing this?