[Bug 1961079] Re: [Ubuntu 22.04] Allow ESP installation on md-disks in subiquity

[Julian Andres Klode]

This is very unfortunate. So the UEFI system is able to read mdraid 1.2
too, and can access ESPs inside of it?

Most systems do not implement linux's mdraid in their firmware, and
hence putting the ESP inside the RAID would lead to unbootable systems;
which is why we designed the solution where you can place an ESP on each
disk outside the raid and then raid the partitions instead.

There's some caveats in that systems accidentally can read ESPs in an
mdraid 1.0 as the metadata is at the end only, but in general exposing
that would be a bad idea.

So I guess one could implement a quirk to allow you to place ESPs in
there on this specific hardware, but creating such RAIDs and placing
ESPs in them in general should not be possible.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub2 in Ubuntu.
https://bugs.launchpad.net/bugs/1961079

Title:
  [Ubuntu 22.04] Allow ESP installation on md-disks in subiquity

Status in grub2 package in Ubuntu:
  Incomplete
Status in subiquity package in Ubuntu:
  New
Status in grub2 source package in Focal:
  New
Status in subiquity source package in Focal:
  New
Status in grub2 source package in Jammy:
  Incomplete
Status in subiquity source package in Jammy:
  New

Bug description:
  subiquity installer currently does not allow to select md-disk as Installation destination where /, /home and /boot/efi could be created and installed. 
  Request is to enable this feature so that we can install and boot from md-disk, which our BIOS creates.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1961079/+subscriptions