grub2 disk error with kvm

[Daniel Dehennin <daniel.dehennin@baby-gnu.org>]

[-- Attachment #1: Type: text/plain, Size: 1724 bytes --]

Hello,

I post a bug report here as asked by nyu on #grub.

=== IRC LOG ===
[13:32] <nyu> nebuchadnezzar: could you report the grub one first?  the problem
    is grub_biosdisk_get_diskinfo_standard() fails, but this call wasn't used
    when probing for drives (and I think it should be)
=== IRC LOG ===

I have a kvm machine featuring debian lenny (now upgraded to sid).
It has only one disk configured, with one partition as LVM so I
install grub2 1.96+20080724-7.

When booting I have the following error:

===
error: unknown drive hd15
Entering rescue mode...
===

This does not come from the configuration, I renamed grub.cfg and the
same happens.

Nyu ask me to remove the grub_error call line 53:
grub_error (GRUB_ERR_BAD_DEVICE, "unknown device %s", name);

Then it gives me "error: no such disk".

In rescue mode:
- I can insmod normal and enter in normal mode to boot my system.
- ls gives me (lenny-var) (lenny-usr) (lenny-root) (lenny-boot) (hd0) (hd0,1) (hd1) (hd2)...(hd15)

The problem happens only when using the kvm -drive option:
sudo /usr/bin/kvm -M pc -m 256 -smp 1 -name lenny -monitor stdio \
    -boot c -drive file=/dev/hati/lenny,if=virtio,index=0,boot=on \
    -net nic,model=virtio,vlan=0 -net tap,vlan=0,ifname=vnet0 \
    -serial pty -parallel none -k fr

Replacing this by -hda makes it work:

sudo /usr/bin/kvm -M pc -m 256 -smp 1 -name lenny -monitor stdio \
    -boot c -hda dev/hati/lenny \
    -net nic,model=virtio,vlan=0 -net tap,vlan=0,ifname=vnet0 \
    -serial pty -parallel none -k fr

I provide the grub.cfg as attachement, I can provide lspci, dmesg or
what ever you need.

Regards.
-- 
Daniel Dehennin
Récupérer ma clef GPG:
gpg --keyserver pgp.mit.edu --recv-keys 0x6A2540D1


[-- Attachment #2: grub.cfg --]
[-- Type: text/plain, Size: 1385 bytes --]

#
# 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 ###
set default=0
set timeout=5
insmod lvm
set root=(lenny-usr)
search --fs-uuid --set b67ea215-b6ec-40cc-bfe8-56e1284a42c8
if font /share/grub/ascii.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 ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### 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 ###
insmod lvm
set root=(lenny-boot)
search --fs-uuid --set 5b03d02f-e69e-418d-8f03-b0eb4e3185de
menuentry "Debian GNU/Linux, linux 2.6.25-2-amd64" {
	linux	/vmlinuz-2.6.25-2-amd64 root=/dev/mapper/lenny-root ro  vga=0x318
	initrd	/initrd.img-2.6.25-2-amd64
}
menuentry "Debian GNU/Linux, linux 2.6.25-2-amd64 (single-user mode)" {
	linux	/vmlinuz-2.6.25-2-amd64 root=/dev/mapper/lenny-root ro single 
	initrd	/initrd.img-2.6.25-2-amd64
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file is an example on how to add custom entries
### END /etc/grub.d/40_custom ###