[Bug 420992] Re: Cannot install grub2 on dmraid with text-mode installer

[Tom Louwrier]

update

Installed Oneiric from CD onto one of my machines with dmraid (theone
with the Promise Fasttrak100 chipset). The live CD found all partitions
OK and offered to upgrade the existing 10.10 Maverick installation. So
far, so good.

At the end of the process grub-installer tried to set up grub on sda. No luck, but it did come up with a screen asking me where I would like to see grub.  At that moment I was happy and confident things would go right, since the pull down menu showed all the right entries.
I chose /dev/mapper/pcb_jcchiiab, which is the raid set's mbr as opposed to one of the partitions.
The installer obliged -it seemed- and finished without further messages.

Alas, after rebooting I got a grub shell prompt. It seems the installation did not replace the part of grub living in the MBR, so it does not load the stage that actually boots my OS.
I'll try and get into a root shell and reinstall manually, that did help me out before.

Will report back and let you know.

cheers
Tom

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https://bugs.launchpad.net/bugs/420992

Title:
  Cannot install grub2 on dmraid with text-mode installer

Status in “grub-installer” package in Ubuntu:
  Triaged
Status in “grub-installer” package in Debian:
  New

Bug description:
  Tried to install Karmic using the daily alternate amd64 image from 2009-08-29, on an nvidia fakeraid array.
  (I had issues with grub using the alpha 4 image)

  Packages versions :
  grub-pc 1.96+20090826-3ubuntu3
  grub-installer 1.40ubuntu2

  When grub-installer launches, it only gives the choice to install on
  the raw array elements (ie /dev/sda and /dev/sdb) instead of the array
  itself (/dev/mapper/nvidia_ibifiefd), although the array and its
  partitions were correctly detected.

  I cancelled the installation so as not to mess up the array.

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