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>>>> I've got a fresh Gentoo installation that does not boot. I just end up in |
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>>>> the Grub2 shell. |
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>>>> |
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>>>> However when there if I do 'set root=(md/0)' and 'configfile /grub/grub.cfg' |
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>>>> I do get to the Grub2 menu where Gentoo boots just fine. |
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>>>> |
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>>>> /boot and / are both on mdadm devices. |
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>>>> |
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>>>> I've tried re-running grub-mkconfig and grub-install several times without |
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>>>> luck. |
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>>>> |
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>>>> I've added domdadm to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub. |
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>>>> |
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>>>> Drives sda/sdb use GPT disklabels and have 20M BIOS boot partitions first. |
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>>> |
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>>> To which device are you installing grub? |
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>>> |
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>>> Check what "core.img" prefix and modules grub-install is using with |
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>>> |
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>>> grub-install --debug $your_device 2>&1 | grep grub-mkimage |
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>>> |
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>>> [I hit a similar problem with mdadm 6 or 7 years ago and had to create |
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>>> a custom "core.img" to boot normally. You might have to do the same |
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>>> but i would've thought that this problem's been solved. I haven't |
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>>> encountered it since.] |
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>> |
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>> I install grub to devices sda and sdb in the hope I can boot from both/either |
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>> |
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>> m / # grub-install --debug /dev/sda 2>&1 | grep grub-mkimage |
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>> grub-install: info: grub-mkimage --directory '/usr/lib/grub/i386-pc' |
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>> --prefix '(mduuid/46488b259685a3b9c52b7449d592dc80)/grub' --output |
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>> '/boot/grub/i386-pc/core.img' --format 'i386-pc' --compression 'auto' |
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>> 'ext2' 'part_gpt' 'part_gpt' 'diskfilter' 'mdraid1x' 'biosdisk' |
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>> m / # |
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> |
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> [ I assume that "46488b259685a3b9c52b7449d592dc80" is the UUID that's |
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> displayed as "UUID" or "Array UUID" when you use "mdadm -D ..." or |
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> "mdadm -E ..." respectively ] |
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|
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Almost, mdadm says 46488b25:9685a3b9:c52b7449:d592dc80 |
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|
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> Does "set" in the grub shell display |
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> "prefix=(mduuid/46488b259685a3b9c52b7449d592dc80)/grub" and |
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> "root=(mduuid/46488b259685a3b9c52b7449d592dc80)"? |
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|
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Yes, I messed up the prefix=-line when retyping it. |
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|
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> Does "grub-probe -t drive -d /dev/md0" output "(mduuid/...)" or |
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> "(md/0)" or "(md0)"? |
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|
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It ouputs "(mduuid/46488b259685a3b9c52b7449d592dc80)" |
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