[Bug 1103256] Re: Kubuntu installer failed at grub-install (on wrong device)

[Phillip Susi]

You must install grub to a physical disk, not a raid array.  There is a
separate bug report where ubiquity says it is installing grub to
/dev/sda when it is really installing elsewhere.  You also do not need
to have a separate /boot mirror.  You can, for instance, put 3 disks
into a raid5, and have / as an lvm volume built on the raid5.  Ubiquity
also only lets you choose one place to install grub to, but if you use
the alternate installer or run dpkg-reconfigure grub-pc, you can select
multiple disks to install to so you can still boot should one fail.


** Changed in: grub-installer (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1103256

Title:
  Kubuntu installer failed at grub-install (on wrong device)

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

Bug description:
  Disks earlier prepared using mdadm(8) and lvm2; /boot is an md(4)
  mirror, while /, /home and /var are lvm2 logical volumes. In the live
  environment, I installed mdadm and lvm2 using apt-get, and started the
  arrays (which also configured the volume group).

  Then I started the Kubuntu installer, selected manual partitioning,
  and set up the three LVs to be formatted as ext4, and md127 (/boot) to
  be formatted as ext3. I chose also chose /dev/md127 as the location to
  install grub.

  Towards the end of the installation, an error occurred "grub-install
  /dev/sda failed - this is fatal". So it looks like my choice isn't
  preserved and passed through to grub-install.

  In addition, manually mounting the new root & boot filesystems and
  running "grub-install --boot-directory=/mnt/boot /dev/md127" also
  fails, with a segfault in the underlying command "/usr/sbin/grub-setup
  --directory=/mnt/boot/grub --device-map=/mnt/boot/grub/device.map
  /dev/md127" :-(

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: ubiquity 2.10.16 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
  Uname: Linux 3.2.0-23-generic x86_64
  ApportVersion: 2.0.1-0ubuntu5
  Architecture: amd64
  CasperVersion: 1.315
  Date: Wed Jan 23 00:42:05 2013
  InstallCmdLine: file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity initrd=/casper/initrd.lz quiet splash -- keyboard-configuration/layoutcode=gb
  LiveMediaBuild: Kubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120423)
  ProcEnviron:
   LANGUAGE=
   TERM=xterm
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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