[Linux-bruxelles] Grub et booter un autre système à la main, problème

[Aldo]

Je voulais savoir si l aprésence de grub implique qu'il falle TOUT 
booter à partir de grub, tout signaler dans menu.lst et que dès lors on 
ne peut plus lancer un système via Loadlin, système qui ne serait pas 
mentionné dans le menu.lst?
j'ai le cas ici:
j'ia une Debian officielle (de travail) + une autre de test qui n'a pas 
été ajoutée à menu.lst et que je souhaite booter à la main ou via un 
batch depuis ma partoche FAT: eh bien ça ne fonctionne pas.

Voici mon menu.lst;
ce que j'essaye de booter se trouve sur hdb6, auparavant j'arrivais tj 
à booter, quand j'avais pas grub:


# 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'.           
default		0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout		15

# 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 specifiv 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=root=/dev/hdb5 ro

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

## 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

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

## ## End Default Options ##

title		Debian GNU/Linux, kernel 2.4.27-2-686  
root		(hd1,4)
kernel		/boot/vmlinuz-2.4.27-2-686 root=/dev/hdb5 ro vga=extended
initrd		/boot/initrd.img-2.4.27-2-686
savedefault
boot

title		Debian GNU/Linux, kernel 2.4.27-2-686 (recovery mode)
root		(hd1,4)
kernel		/boot/vmlinuz-2.4.27-2-686 root=/dev/hdb5 ro single
initrd		/boot/initrd.img-2.4.27-2-686
savedefault
boot

title		Debian GNU/Linux, kernel 2.2.20-idepci 
root		(hd1,4)
kernel		/boot/vmlinuz-2.2.20-idepci root=/dev/hdb5 ro vga=extended
savedefault
boot

title		Debian GNU/Linux, kernel 2.2.20-idepci (recovery mode)
root		(hd1,4)
kernel		/boot/vmlinuz-2.2.20-idepci root=/dev/hdb5 ro single
savedefault
boot

title		Debian GNU/Linux, kernel memtest86 
root		(hd1,4)
kernel		/boot/memtest86.bin  
boot

title		DOS
root		(hd0,0)
makeactive
chainloader	+1

### END DEBIAN AUTOMAGIC KERNELS LIST


D'avance merci !

Aldo.