[Bug 1322182] Re: fatal error on clean install to existing RAID10

[Phillip Susi]

You need to install grub to /dev/sda, not /dev/sda1.  Due to another
known bug in the desktop installer, if the first attempt fails, all
subsequent ones will as well, so you need to start over and make sure to
choose the correct drive the first time.


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

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Title:
  fatal error on clean install to existing RAID10

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

Bug description:
  I booted from the dvd, clicked "Try Kubuntu", downloaded and set up mdadm, ran mdadm --assemble --scan, and got the following from mdadm --detail /dev/md1
  /dev/md1:
          Version : 1.2
    Creation Time : Thu Oct 27 00:34:39 2011
       Raid Level : raid10
       Array Size : 3875288064 (3695.76 GiB 3968.29 GB)
    Used Dev Size : 1937644032 (1847.88 GiB 1984.15 GB)
     Raid Devices : 4
    Total Devices : 4
      Persistence : Superblock is persistent

      Update Time : Wed May 21 03:05:57 2014
            State : clean 
   Active Devices : 4
  Working Devices : 4
   Failed Devices : 0
    Spare Devices : 0

           Layout : near=2
       Chunk Size : 512K

             Name : bruce-kubuntu-RAID10:1
             UUID : dc641f0e:34c13fe3:2ccda182:7a42822f
           Events : 689

      Number   Major   Minor   RaidDevice State
         0       8        3        0      active sync   /dev/sda3
         1       8       19        1      active sync   /dev/sdb3
         2       8       35        2      active sync   /dev/sdc3
         3       8       51        3      active sync   /dev/sdd3

  Next, I clicked "Install Kubuntu 14.04 LTS". When I got to "Disk Setup Installation type" I chose "Manual".
  The installer found /dev/md0, which is my swap, and /dev/md1, which is my main RAID. I selected it and clicked "change". I changed "do not use the partition" to "ext4 journaling file system", chose "Format the partition", and the automatically selected Mount point "/". I then selected "/dev/sda1", which is a 1MB partition, and clicked "change", selected "Reserved BIOS boot area", and "Ok" because "Format the partition" and "Mount point:" were grayed out.

  Next, since "Device for boot loader installation:" defaulted to "/dev/sda", I selected "/dev/sda1".
  The installer continued, downloaded and installed files, then presented a text box "Executing 'grub-install /dev/sda' failed. This is a fatal error." I clicked "Ok" and got "Installer Crashed We're sorry, the installer crashed. Please file a new bug report..." which brought me here. 

  I also tried allowing "Device for boot loader installation:" to
  default to "/dev/sda", with the same fatal error resulting.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubiquity 2.18.7 [modified: lib/partman/automatically_partition/question]
  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: Thu May 22 05:47:12 2014
  InstallCmdLine: file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  LiveMediaBuild: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1)
  ProcEnviron:
   LANGUAGE=
   TERM=xterm
   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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