> > I've got a fresh Gentoo installation that does not boot. I just end up in > > the Grub2 shell. > > > > However when there if I do 'set root=(md/0)' and 'configfile /grub/grub.cfg' > > I do get to the Grub2 menu where Gentoo boots just fine. > > > > /boot and / are both on mdadm devices. > > > > I've tried re-running grub-mkconfig and grub-install several times without > > luck. > > > > I've added domdadm to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub. > > > > Drives sda/sdb use GPT disklabels and have 20M BIOS boot partitions first. > > To which device are you installing grub? > > Check what "core.img" prefix and modules grub-install is using with > > grub-install --debug $your_device 2>&1 | grep grub-mkimage > > [I hit a similar problem with mdadm 6 or 7 years ago and had to create > a custom "core.img" to boot normally. You might have to do the same > but i would've thought that this problem's been solved. I haven't > encountered it since.]
I install grub to devices sda and sdb in the hope I can boot from both/either m / # grub-install --debug /dev/sda 2>&1 | grep grub-mkimage grub-install: info: grub-mkimage --directory '/usr/lib/grub/i386-pc' --prefix '(mduuid/46488b259685a3b9c52b7449d592dc80)/grub' --output '/boot/grub/i386-pc/core.img' --format 'i386-pc' --compression 'auto' 'ext2' 'part_gpt' 'part_gpt' 'diskfilter' 'mdraid1x' 'biosdisk' m / #
