Comment 74 for bug 631795

On 3/8/2011 11:24 AM, Tom Louwrier wrote:
> That left the machine non bootable so I put a USB stick in and booted
> Natty server (32-bits). Installed Natty from the stick but without
> formatting existing partitions.
> Same result: not booting, so again booting from USB, rescue a broken
> system, drop into a root shell, grub-install on
> /dev/mapper/isw_cfaeccihhh_RAID_MIKE.
> That fixed the booting side of things.

IIRC, there is another bug about the alternate installer not giving the
choice of where to install grub to. Ubiquity gives a drop down list
that defaults to /dev/sda, which you need to change to the raid array.

> As I understand you this would mean that a defect in the automatic
> installation long time ago would still be coming back on every upgrade /
> re-install?

Yes, the grub package remembers where it was installed to and reinstalls
there again on upgrade. You can configure that location by running sudo
dpkg-reconfigure grub-pc.

> I'll see what information I can get for you later this week (any
> specific logs you would like to see?)

What I need is to figure out the state of affairs when you get dumped to
the initramfs. Specifically whether the array has shown up in
/dev/mapper and if not, why. Booting with the nosplash and noquiet
options might be helpful explaining that, followed by a cursory ls
/dev/mapper/ once at the initramfs shell.