fdisk -l output:
Disk /dev/sda1: 20.0 GB, 20012073984 bytes
255 heads, 63 sectors/track, 2432 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x69205244

This doesn't look like a partition table
Probably you selected the wrong device.

     Device Boot      Start         End      Blocks   Id  System
/dev/sda1p1   ?       13578      119522   850995205   72  Unknown
Partition 1 does not end on cylinder boundary.
/dev/sda1p2   ?       45382       79243   271987362   74  Unknown
Partition 2 does not end on cylinder boundary.
/dev/sda1p3   ?       10499       10499           0   65  Novell Netware 386
Partition 3 does not end on cylinder boundary.
/dev/sda1p4          167628      167631       25817+   0  Empty
Partition 4 does not end on cylinder boundary.



== grub.cfg ==
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function recordfail {
  set recordfail=1
  if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}

function load_video {
}

if [ "${recordfail}" = 1 ]; then
  set timeout=-1
else
  set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
### END /etc/grub.d/05_debian_theme ###

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

### BEGIN /etc/grub.d/10_lupin ###
menuentry "Ubuntu, Linux 2.6.35-22-generic" {
	insmod part_msdos
	insmod ntfs
	set root='(hd0,msdos1)'
	search --no-floppy --fs-uuid --set 40209c74209c72a0
	loopback loop0 /ubuntu/disks/root.disk
	set root=(loop0)
	linux /boot/vmlinuz-2.6.35-22-generic root=/dev/sda1 loop=/ubuntu/disks/root.disk ro   quiet splash
	initrd /boot/initrd.img-2.6.35-22-generic
}
menuentry "Ubuntu, Linux 2.6.35-22-generic (recovery mode)" {
	insmod part_msdos
	insmod ntfs
	set root='(hd0,msdos1)'
	search --no-floppy --fs-uuid --set 40209c74209c72a0
	loopback loop0 /ubuntu/disks/root.disk
	set root=(loop0)
	linux /boot/vmlinuz-2.6.35-22-generic root=/dev/sda1 loop=/ubuntu/disks/root.disk ro single
	initrd /boot/initrd.img-2.6.35-22-generic
}
### END /etc/grub.d/10_lupin ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Microsoft Windows XP Professional (on /dev/sda1)" {
	insmod part_msdos
	insmod ntfs
	set root='(hd0,msdos1)'
	search --no-floppy --fs-uuid --set 40209c74209c72a0
	drivemap -s (hd0) ${root}
	chainloader +1
}
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###