[Bug 789226] Re: 11.04 with Software Raid5 fails to install correctly

[Phillip Susi]

It seems that grub isn't recognizing the raid array for some reason.


** Package changed: ubuntu => grub2 (Ubuntu)

** Changed in: grub2 (Ubuntu)
       Status: Incomplete => New

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https://bugs.launchpad.net/bugs/789226

Title:
  11.04 with Software Raid5 fails to install correctly

Status in “grub2” package in Ubuntu:
  New

Bug description:
  I'm using 3 at 3TB drives, and I would like to setup Ubuntu in a software
  RAID5 configuration.

  When I tell the installer to setup the partitions automatically, it gives me 3 partitions.  I have tried setting the first partition on each drive to a BIOSGRUB without raid and it fails to install correctly, meaning sometimes it will give me errors when the installer gets to the step to install GRUB, and other times I've been able to install fully, but when it reboots, the install will either hang right after the BIOS load, or will provide me a GRUB installer error.  
  When I try to use the first partition as a RAID1 as the wiki suggests, and I set the RAID md0 to ext4, bootable, and mounted to /boot, I get an error during the install having to do with GRUB trying to install to /dev/sda and the other disks, whereas it should be installing to md0.

  I believe this is a bug in the installer, and so far, I don't know how I can install using a software Raid5.  If I am putting in the wrong options, I'm not sure how to configure the installer to do what I need it to do.
  Regardless, the installer should be much easier - it should be guiding me through installing a software Raid 5.  I'm not trying to do a dual-boot system, just a straight-forward Ubuntu 11.04 server install with a software Raid5.  I've attempted to do multiple installs with different configurations to get this to work, but I have yet to be successful.  One of these errors will always cause either a red screen error without help on what is going wrong, or will install fully and on the reboot will not allow the system to boot up.