Bug#467501: grub-pc: Fails to cleanly upgrade a grub legacy box with RAID1

[Jonathan McDowell]

Package: grub-pc
Version: 1.96+20080219-2
Severity: important

I have installed grub-pc on my shiny new AMD64 box. After verifying it
loaded fine when chainloaded from legacy grub I typed
"upgrade-from-grub-legacy" and rebooted. I was rewarded with the grub
rescue shell.

For some reason it has decided that "prefix=(fd0)/boot/grub" rather than
"prefix=(md0)/boot/grub". If I do something along the lines of (from
memory, but I believe this was the rough gist):

root (md0)
set prefix=(md0)/boot/grub
insmod /boot/grub/boot.mod
normal

then I get the expected boot menu.

I can't see any sign of fd0 in /boot/grub so I'm not even sure how to
fix this locally myself at present.


-- Package-specific info:

*********************** BEGIN 
/dev/md0 / ext3 rw,errors=remount-ro,data=ordered 0 0
/dev/md0 /dev/.static/dev ext3 rw,errors=remount-ro,data=ordered 0 0
/dev/mapper/satavg-home /home ext3 rw,data=ordered 0 0
/dev/mapper/satavg-tmp /tmp ext3 rw,data=ordered 0 0
/dev/mapper/satavg-usr /usr ext3 rw,data=ordered 0 0
/dev/mapper/satavg-var /var ext3 rw,data=ordered 0 0
*********************** END 

*********************** BEGIN /boot/grub/device.map
(hd0)	/dev/sda
(hd1)	/dev/sdb
*********************** END /boot/grub/device.map

*********************** BEGIN /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/update-grub using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
insmod lvm
set default=0
set timeout=5
set root=(md0)
if font (satavg-usr)/share/grub/unicode.pff ; then
  set gfxmode=640x480
  insmod gfxterm
  insmod vbe
  terminal gfxterm
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
insmod png
if background_image (satavg-usr)/share/images/desktop-base/debian-blueish-wallpaper-640x480.png ; then
  set color_normal=black/black
  set color_highlight=magenta/black
else
  set menu_color_normal=cyan/blue
  set menu_color_highlight=white/blue
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_hurd ###
### END /etc/grub.d/10_hurd ###

### BEGIN /etc/grub.d/10_linux ###
menuentry "Debian GNU/Linux, linux 2.6.25-rc3" {
	linux	(md0)/boot/vmlinuz-2.6.25-rc3 root=/dev/md0 ro quiet
	initrd	(md0)/boot/initrd.img-2.6.25-rc3
}
menuentry "Debian GNU/Linux, linux 2.6.25-rc3 (single-user mode)" {
	linux	(md0)/boot/vmlinuz-2.6.25-rc3 root=/dev/md0 ro single quiet
	initrd	(md0)/boot/initrd.img-2.6.25-rc3
}
menuentry "Debian GNU/Linux, linux 2.6.25-rc2-git6" {
	linux	(md0)/boot/vmlinuz-2.6.25-rc2-git6 root=/dev/md0 ro quiet
	initrd	(md0)/boot/initrd.img-2.6.25-rc2-git6
}
menuentry "Debian GNU/Linux, linux 2.6.25-rc2-git6 (single-user mode)" {
	linux	(md0)/boot/vmlinuz-2.6.25-rc2-git6 root=/dev/md0 ro single quiet
	initrd	(md0)/boot/initrd.img-2.6.25-rc2-git6
}
menuentry "Debian GNU/Linux, linux 2.6.24-1-amd64" {
	linux	(md0)/boot/vmlinuz-2.6.24-1-amd64 root=/dev/md0 ro quiet
	initrd	(md0)/boot/initrd.img-2.6.24-1-amd64
}
menuentry "Debian GNU/Linux, linux 2.6.24-1-amd64 (single-user mode)" {
	linux	(md0)/boot/vmlinuz-2.6.24-1-amd64 root=/dev/md0 ro single quiet
	initrd	(md0)/boot/initrd.img-2.6.24-1-amd64
}
menuentry "Debian GNU/Linux, linux 2.6.24" {
	linux	(md0)/boot/vmlinuz-2.6.24 root=/dev/md0 ro quiet
	initrd	(md0)/boot/initrd.img-2.6.24
}
menuentry "Debian GNU/Linux, linux 2.6.24 (single-user mode)" {
	linux	(md0)/boot/vmlinuz-2.6.24 root=/dev/md0 ro single quiet
	initrd	(md0)/boot/initrd.img-2.6.24
}
menuentry "Debian GNU/Linux, linux 2.6.22-3-amd64" {
	linux	(md0)/boot/vmlinuz-2.6.22-3-amd64 root=/dev/md0 ro quiet
	initrd	(md0)/boot/initrd.img-2.6.22-3-amd64
}
menuentry "Debian GNU/Linux, linux 2.6.22-3-amd64 (single-user mode)" {
	linux	(md0)/boot/vmlinuz-2.6.22-3-amd64 root=/dev/md0 ro single quiet
	initrd	(md0)/boot/initrd.img-2.6.22-3-amd64
}
### END /etc/grub.d/10_linux ###
*********************** END /boot/grub/grub.cfg

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.24-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages grub-pc depends on:
ii  base-files                4.0.2          Debian base system miscellaneous f
ii  debconf [debconf-2.0]     1.5.19         Debian configuration management sy
ii  libc6                     2.7-8          GNU C Library: Shared libraries
ii  liblzo1                   1.08-3         data compression library (old vers
ii  libncurses5               5.6+20080203-1 Shared libraries for terminal hand

grub-pc recommends no packages.

-- debconf information:
  grub-pc/linux_cmdline:
* grub-pc/chainload_from_menu.lst: true