[Bug 991106] Re: Ubuntu 12.04 bootloader installation problem on RAID

[Dougga]

Using Ubuntu 12.04 LTS - Alternative using Expert Mode

I am attempting a new install on 4 disks.
Disk 1 has a dedicated 3mb partition for bios_grub & GPT
Disk 1 has a 32MB disk for SWAP
The rest of the 4 1.5 Terabyte drives are formatted for a single Raid 10 device.

When it' s time to install the Boot_Loader, it attempt to install on a Master Boot Record.
Since I'm using GPT, a fatal error occurs.

It appears though the hard drive is formatted for GPT, the installation app does not support it.
AFter hacking about the boot loader option a while, I click on continue without bootloader
It says I need to mount to /dev/md127

I have attempted to fix this with the Linux-Secure-Remix CD but haven't
found a solution.

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https://bugs.launchpad.net/bugs/991106

Title:
  Ubuntu 12.04 bootloader installation problem on RAID

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  Trying to install Ubuntu 12.04 Desktop x64.

  PC configuration:

  MB: Asus P6T
  HDD Controller: Intel ICH8R (ICH8) SATA RAID Controller
  CPU: Intel Core i7 920
  RAM: 6x2Gb DDR3
  Video: nVidia geForce 250 512Mb

  HDD: 2x320Gb as RAID0
  Partitions: first: ext4, second: ntfs. No swap partition.

  Steps to repeat:
  1. Have similar RAID configuration (I guess any MB-powered RAID0 installation will do the thing)
  2. Try to make a fresh install of Ubuntu 12.04

  I've chosen ext4 as mount point for / during installaton. Checked
  "format" checkbox for it.

  What happens:
  At the end of the installation creation of bootloader failed for root partition (something like /dev/mapper/*******Volume0). After I've presed Ok it offered me to chose another partition. I tried to chose both of /dev/mapper/*******Volume0p1 (there were two of them and two /dev/mapper/*******Volume0p2) with same result. During that process another dialog popped up. It was reporting that installation went fine and system is ready to use. After I've pressed "reboot" button I've got unbootable PC. Had to restore the bootloader manually using 11.10 live flash. After that windows could boot successfully, but fresh installation of 12.04 showed some graphical trash at the screen and completely hanged right after hitting it's grub entry.

  What should happen:
  Like 11.10 it should offer me only three devices: root one, first partition(ext4) and second partition(ntfs) but not six, and it must install the bootlodaer and boot without any problems.

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