Problème de boot ubuntu

# menu.lst - See: grub(8), info grub, update-grub(8)
#            grub-install(8), grub-floppy(8),
#            grub-md5-crypt, /usr/share/doc/grub
#            and /usr/share/doc/grub-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 1 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not use 'savedefault' or your
# array will desync and will not let you boot your system.
default         1

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout         3

## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
hiddenmenu

# Pretty colours
#color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line)  and entries protected by the
# command 'lock'
# e.g. password topsecret
#      password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title         Windows 95/98/NT/2000
# root          (hd0,0)
# makeactive
# chainloader   +1
#
# title         Linux
# root          (hd0,1)
# kernel        /vmlinuz root=/dev/hda2 ro
#

#
#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
##      kopt_2_6_8=root=/dev/hdc1 ro
##      kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=823413E53413DB4D loop=/ubuntu/disks/root.disk ro

## default grub root device
## e.g. groot=(hd0,0)
# groot=()/ubuntu/disks

## should update-grub create alternative automagic boot options
## e.g. alternative=true
##      alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
##      lockalternative=false
# lockalternative=false

## additional options to use with the default boot option, but not with the

## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash

## should update-grub lock old automagic boot options
## e.g. lockold=false
##      lockold=true
# lockold=false

## Xen hypervisor options to use with the default Xen boot option
# xenhopt=

## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
##      altoptions=(recovery) single
# altoptions=(recovery mode) single

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
##      howmany=7
# howmany=all

## specify if running in Xen domU or have grub detect automatically
## update-grub will ignore non-xen kernels when running in domU and vice versa                                                                
  ## e.g. memtest86=true
##      memtest86=false
# memtest86=true

## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false

## should update-grub add savedefault to the default options
## can be true or false
# savedefault=false

## ## End Default Options ##

title           Ubuntu 9.10, kernel 2.6.31-21-generic
root            ()/ubuntu/disks
kernel          /boot/vmlinuz-2.6.31-21-generic root=UUID=823413E53413DB4D loop=/ubuntu/disks/root.disk ro quiet splash
initrd          /boot/initrd.img-2.6.31-21-generic
                                                                     
title           Ubuntu 9.10, kernel 2.6.31-21-generic (recovery mode)
root            ()/ubuntu/disks
kernel          /boot/vmlinuz-2.6.31-21-generic root=UUID=823413E53413DB4D loop=/ubuntu/disks/root.disk ro  single
initrd          /boot/initrd.img-2.6.31-21-generic

title           Ubuntu 9.10, kernel 2.6.28-18-generic
root            ()/ubuntu/disks
kernel          /boot/vmlinuz-2.6.28-18-generic root=UUID=823413E53413DB4D loop=/ubuntu/disks/root.disk ro quiet splash
initrd          /boot/initrd.img-2.6.28-18-generic

title           Ubuntu 9.10, kernel 2.6.28-18-generic (recovery mode)
root            ()/ubuntu/disks
kernel          /boot/vmlinuz-2.6.28-18-generic root=UUID=823413E53413DB4D loop=/ubuntu/disks/root.disk ro  single
initrd          /boot/initrd.img-2.6.28-18-generic

title           Ubuntu 9.10, memtest86+
root            ()/ubuntu/disks
kernel          /boot/memtest86+.bin
kernel          /boot/memtest86+.bin

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title           Other operating systems:
root


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title           Windows Vista (loader)
rootnoverify    (hd0,0)
savedefault
chainloader     +1


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda2
title           Windows Vista (loader)
rootnoverify    (hd0,1)
savedefault
chainloader     +1




kernel          /boot/memtest86+.bin

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title           Other operating systems:
root


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title           Windows Vista (loader)
rootnoverify    (hd0,0)
savedefault
chainloader     +1


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda2
title           Windows Vista (loader)
rootnoverify    (hd0,1)
savedefault
chainloader     +1

Disque /dev/sda: 250.1 Go, 250059350016 octets 
255 têtes, 63 secteurs/piste, 30401 cylindres 
Unités = cylindres de 16065 * 512 = 8225280 octets 
Identifiant de disque : 0x0271d0e0 

Périphérique Amorce  Début        Fin      Blocs     Id  Système 
/dev/sda1               1        1529    12281661   27  Inconnu 
/dev/sda2   *        1530       15979   116068352    6  FAT16 
/dev/sda3           15979       30402   115847168    7  HPFS/NTFS