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

[Sujith Pandel]

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

Yes, currently install & boot with mdraid 1.2 works for other OS like
CentOS etc.

Ubuntu subiquity installer seems to be blocking it for ESP/Boot-device.
Ubuntu legacy debian installer was allowing md-raid disk to be selected as Installation destination (including ESP), however we were facing grub install error during installation as in https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1776685 and https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1466150

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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.

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