[Bug 1309639] Re: Installer locks after failing to install GRUB onto RAID array

[PMOverfield]

Thank you, Philip. After the "AskUbuntu" editing mechanism de-formatted
my response there I feared you might abandon this one in disgust at the
garbage. I've attached "grubprobe.out" with the response you requested.
I'm puzzled by the conflict beteen lines 116 and 392: md/root and
/dev/md5 are the same item ~ the RAID-pair assigned to "/"!

** Attachment added: "Resonse to "grub-probe -vv" at "/targt""
   https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1309639/+attachment/4088734/+files/grubprobe.out

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https://bugs.launchpad.net/bugs/1309639

Title:
  Installer locks after failing to install GRUB onto RAID array

Status in “grub-installer” package in Ubuntu:
  Incomplete

Bug description:
  Am installing Trusty (AMD-64 Desktop), with /boot as a RAID-1 set
  (ext2fs) under mdadm on a GPT partition, with a separate, non-RAID,
  unformatted partition for BIOS-grub. At the stage of attempting to
  install GRUB it fails, reporting fatal error. I get the window
  offering the option (among others) to continue without installing GRUB
  anywhere. I select this option, but the "OK" button never becomes
  active and no further progress occurs. The installer shows signs of
  having "crashed" or "locked-up", so I cannot be confident that the
  remainder of the installation has been completed, otherwise I could
  assemble the RAID-sets at a mount-point, then chroot and complete the
  installation of GRUB that way. I know that this build isn't intended
  for RAID installations, but a clean failure would be helpful. Thank
  you.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubiquity 2.18.7
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.340
  Date: Fri Apr 18 17:38:08 2014
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --
  LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  ProcEnviron:
   LANGUAGE=en_GB.UTF-8
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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