Comment 4 for bug 67801

Trying again with 6.10 RC gave the same error. Looking in the log file, this time I was able to find the command which had failed; running that command by hand gave an error message to the effect "hdi is not a BIOS drive" (sorry, I didn't keep good notes and that wording proabably isn't quite right). Googling for that gave some hints that device.map might be involved. Trying one more time, I created /target/boot/grub/ as soon as /target was mounted, then created device.map inside that directory with the contents:

(hd0) /dev/hdi

and let installation progress. This time, grub installation succeeded and the rest of the install went smoothly.

I don't know what if anything was supposed to create device.map, or whether it wasn't supposed to be needed, but maybe this is helpful in figuring out the root cause.