Tu as lu ces docs ? :
http://doc.ubuntu-fr.org/grub
http://doc.ubuntu-fr.org/installation/multiboot
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Merci pour ta réponse.
J'avais déjà lu ces docs, oui, mais j'ai un peu de mal à comprendre :s
Donc, je dois bien modifier /boot/grub/menu.lst mais comment savoir le nom correspondant au disque ? j'ai ouvert device.map, où il y a seulement indiqué "(hd0) /dev/sda"
j'ai regardé dans gparted, et mon disque /dev/sda correspond à mon disque contenant windows xp ? c'est bien ca alors ?

Merci pour ton explication, ca y est, j'ai bien compris :)
Mais... comment savoir comment mes dd sont branchés ? je dois démonter ?

Jeanbi : Bonjour et merci de m'aider :)
voilà :

Disque /dev/sda: 200.0 Go, 200049647616 octets
240 heads, 63 sectors/track, 25841 cylinders
Units = cylindres of 15120 * 512 = 7741440 bytes
Identifiant disque: 0x1549f232

Périphérique Amorce Début Fin Blocs Id Système
/dev/sda1 1 967 7310488+ c W95 FAT32 (LBA)
/dev/sda2 * 968 25840 188039880 7 HPFS/NTFS

Disque /dev/sdb: 10.1 Go, 10110320640 octets
255 heads, 63 sectors/track, 1229 cylinders
Units = cylindres of 16065 * 512 = 8225280 bytes
Identifiant disque: 0xab28ab28

Périphérique Amorce Début Fin Blocs Id Système
/dev/sdb1 * 1 1171 9406026 83 Linux
/dev/sdb2 1172 1229 465885 5 Extended
/dev/sdb5 1172 1229 465853+ 82 Linux swap / Solaris






mum1989 : voila menu.lst ^^


# 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 0 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 0

## 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=7432da94-78ac-41aa-baa5-df61f1c9c9f5 ro

## default grub root device
## e.g. groot=(hd0,0)
# groot=7432da94-78ac-41aa-baa5-df61f1c9c9f5

## 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

## should update-grub create memtest86 boot option
## 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 8.10, kernel 2.6.27-9-generic
uuid 7432da94-78ac-41aa-baa5-df61f1c9c9f5
kernel /boot/vmlinuz-2.6.27-9-generic root=UUID=7432da94-78ac-41aa-baa5-df61f1c9c9f5 ro quiet splash
initrd /boot/initrd.img-2.6.27-9-generic
quiet

title Ubuntu 8.10, kernel 2.6.27-9-generic (recovery mode)
uuid 7432da94-78ac-41aa-baa5-df61f1c9c9f5
kernel /boot/vmlinuz-2.6.27-9-generic root=UUID=7432da94-78ac-41aa-baa5-df61f1c9c9f5 ro single
initrd /boot/initrd.img-2.6.27-9-generic

title Ubuntu 8.10, kernel 2.6.27-7-generic
uuid 7432da94-78ac-41aa-baa5-df61f1c9c9f5
kernel /boot/vmlinuz-2.6.27-7-generic root=UUID=7432da94-78ac-41aa-baa5-df61f1c9c9f5 ro quiet splash
initrd /boot/initrd.img-2.6.27-7-generic
quiet

title Ubuntu 8.10, kernel 2.6.27-7-generic (recovery mode)
uuid 7432da94-78ac-41aa-baa5-df61f1c9c9f5
kernel /boot/vmlinuz-2.6.27-7-generic root=UUID=7432da94-78ac-41aa-baa5-df61f1c9c9f5 ro single
initrd /boot/initrd.img-2.6.27-7-generic

title Ubuntu 8.10, memtest86+
uuid 7432da94-78ac-41aa-baa5-df61f1c9c9f5
kernel /boot/memtest86+.bin
quiet

### END DEBIAN AUTOMAGIC KERNELS LIST

Re,
rajoute ça
title Windows xp
root (hd0,0)
makeactive
chainloader +1
et hop
zou
a+
FC 10 - Mandriva 2009 -Debian 4.0-
Les meilleures choses ont besoin de patience.(JC ANGLADE)

Merci pour vos réponses !
vous n'avez pas l'air d'accord, le savedefault je le mets ou pas ?
et je dois rajouter tout ca à la fin du fichier ?

merci

Ok merci ca marche ;)

Merci Linux :D