Bug#925591: UEFI ESP RAID 1 support for grub

Joerg Dorchain joerg at dorchain.net
Wed Oct 9 16:05:11 BST 2019


On Wed, Oct 09, 2019 at 02:53:17PM +0200, Marco d'Itri wrote:
> On Jun 10, Debian Bug Tracking System <owner at bugs.debian.org> wrote:
> 
> > I'm afraid what you've found is *not* a Grub bug at all. It's a
> > limitation of EFI boot. Your firmware does not understand how to
> > interpret Linux software RAID, so you cannot use a software RAID setup
> > for the EFI System Partition (ESP). This is a known limitation, and
> > there isn't any way to fix this at the moment. Sorry. :-(
> This is not correct, you just need to take care of using a RAID metadata 
> format positioned at the end of the partition:
[...]

Thank Marco, I missed the previous comment.

The referenced wiki entry is just wrong, a setup as explained in the initial
posting as well as in the previous answer to this bug report is fine with the
EFI specs, works out of the box with linux raid and standard initramfs, so grub
should support this as well. (And probably update the wiki)

Bye,

Joerg

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