[Bug 1759877] Re: grub-pc fails to upgrade with raid disks

[MarkS]

This is the log from running

grub-install -v /dev/sda

It doesn't really give me any clues but maybe somebody else will spot
what's wrong.

** Attachment added: "grub-install.log"
   https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1759877/+attachment/5096718/+files/grub-install.log

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Title:
  grub-pc fails to upgrade with raid disks

Status in grub2 package in Ubuntu:
  New

Bug description:
  When performing a regular upgrade an upgrade to grub-pc was scheduled.
  When this got to configuring it reported "grub-install: error: disk
  `md0' not found." for all 4 /dev/sdX devices in the system. The 4
  drives have a RAID1 array for /boot and a RAID5 LVM device for the
  rest of the storage, so grub needs to be installed in the boot sector
  for all four drives.

  Running grub-install manually for the drives resutls in -

  # grub-install /dev/sda                                                                                               
  Installing for i386-pc platform.
  grub-install: error: disk `md0' not found.

  So, this doesn't fill me with confidence that the server is going to
  reboot nicely without intervention from a rescue disk.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: grub-pc 2.02~beta2-36ubuntu3.18
  ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
  Uname: Linux 4.4.0-116-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  Date: Thu Mar 29 16:06:26 2018
  InstallationDate: Installed on 2012-03-20 (2199 days ago)
  InstallationMedia: Ubuntu-Server 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
  ProcEnviron:
   TERM=screen
   SHELL=/bin/bash
   PATH=(custom, user)
   LANG=en_GB.UTF-8
   LANGUAGE=en_GB:en
  SourcePackage: grub2
  UpgradeStatus: Upgraded to xenial on 2016-08-08 (597 days ago)

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