[Bug 1956972] Re: grub-install fatal error during installation

[Hurky]

I fixed the problem, I have several mdadm RAID arrays but mdadm is not
part of the installation and it looks like grub-install need that
package as a dependency to identify the array.

The workaround:
Start the installation in 'Try Ubuntu' mode, don't fill up the user account information.
Open a terminal and chroot into /target
Install mdadm
Fill user data and continue installation.

Regards.

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https://bugs.launchpad.net/bugs/1956972

Title:
  grub-install fatal error during installation

Status in grub-installer package in Ubuntu:
  New

Bug description:
  This happens both to the 21.10 and 20.04.3 versions

  I install mdadm and assemble the RAID devices , then I start the
  installation and choose to install GRUB on the first drive /dev/sda ,
  error says grub-install failed on /dev/sde

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.15.17 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22
  Uname: Linux 5.11.0-27-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.18
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.445.1
  Date: Mon Jan 10 15:39:40 2022
  InstallCmdLine: file=/cdrom/preseed/kubuntu.seed maybe-ubiquity initrd=/casper/initrd quiet splash --- maybe-ubiquity
  LiveMediaBuild: Kubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819.1)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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