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"GRUB loading Read Error" post-install on bare-metal (Dell 1950) #1147
This is an apparent regression between the current beta (899.9.0) and the current alpha (970.1.0).
When installing alpha onto our Dell 1950s (Install by running coreos-install after booting from USB stick), the system fails to boot with "GRUB Loading Read Error".
This happened consistently across 4 1950s, but does not happen on an R420.
When installing beta instead, the error does not occur and the 1950s seem to work fine with beta.
Another maybe relevant difference between the 1950s and the R420 is that the former have simple SAS cards, where the latter has a MegaSAS raid controller.
I can provide whatever output is needed to compare between the two machines.
If it's possible to get a list of versions between those two, I can also attempt to bisect and more tightly nail down when the regression occurred.
Here's one of them in Dell's support system: http://www.dell.com/support/home/us/en/04/product-support/servicetag/2CN3RC1/configuration
Based on that information, we must have also upgraded the hard drives. The CPUs were upgraded to Xeon-E5345, and the RAM was upgraded to 32GiB.
So I did a bit of bisecting:
970.1.0 exhibits the problem
It seems that the problem came in between 921 and 926. Worth noting that 926 included an upgraded GRUB (to address a CVE, but maybe other changes in with it?)