[Bug 976027] Re: "executing 'grub-install /dev/sda' failed. This is a fatal error."

[NounouRs]

Same error ! I'm installing Ubuntu from the 12.04.1 alternate CD.

But I have a log (using Ctrl+Alt+F4 during installation) :
grub-installer: info: Installing grub on '/dev/sda'
grub-installer: info: grub-install supports --no-floppy
grub-installer: info: Running chroot /target grub-install --no-floppy --force "/dev/sda"
grub-installer: /usr/sbin/grub-setup: warn: Your core.img is unusually large. It won't fit in the embedding area.
grub-installer: /usr/sbin/grub-setup: error: embedding is not possible, but this is required when the root device is on a RAID array or LVM volume.
grub-installer: error: Running 'grub-install --no-floppy --force "/dev/sda"' failed.

And of course, my "/" root is on an LVM volume which is on a RAID 0 partition.
And second information, I've formated (ext4) the corresponding volume of "/" but all my partitions where created a long time ago, under Ubuntu 10.10... is that possible that the space reserved at this time is now too small ?

Is it also possible to boot without grub with any Boot CD or a command
line trick ? (with graphics and so on...)

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https://bugs.launchpad.net/bugs/976027

Title:
  "executing 'grub-install /dev/sda' failed. This is a fatal error."

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

Bug description:
  This appeared on /dev/sda and /dev/sda1
  Don't know what to do. Just want to test with fresh instalation.

  
  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: ubiquity 2.10.4
  ProcVersionSignature: Ubuntu 3.2.0-20.33-generic 3.2.12
  Uname: Linux 3.2.0-20-generic x86_64
  ApportVersion: 1.95-0ubuntu1
  Architecture: amd64
  CasperVersion: 1.312
  Date: Sat Apr  7 17:43:01 2012
  InstallCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/ubuntu.seed boot=casper persistent initrd=/casper/initrd.lz splash -- BOOT_IMAGE=/casper/vmlinuz
  LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
  ProcEnviron:
   LANGUAGE=pl_PL.UTF-8
   TERM=unknown
   PATH=(custom, no user)
   LANG=pl_PL.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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