What is boot image?
 

I've install red hat 9 (/dev/hdb6) and then install mandrake 9 (/dev/hdb7) and then i can't boot to red hat anymore.
How to make mandrake's lilo to boot red hat, i heard that we have to make red hat's boot image in order to do that.
Well, what is boot image and how to make a boot image.

Thank's.

Can you post your Mandrake's /etc/lilo.conf? All you may have to do is add a stanza for Red Hat in it.

This is mandrake's lilo.conf file; thank's..:)

boot=/dev/hda
map=/boot/map
vga=normal
default="windows"
keytable=/boot/us.klt
prompt
nowarn
timeout=100
message=/boot/message
menu-scheme=wb:bw:wb:bw
image=/boot/vmlinuz
label="linux"
root=/dev/hdb7
initrd=/boot/initrd.img
append="quiet devfs=mount hdc=ide-scsi acpi=off"
vga=788
read-only
image=/boot/vmlinuz
label="linux-nonfb"
root=/dev/hdb7
initrd=/boot/initrd.img
append="devfs=mount hdc=ide-scsi acpi=off"
read-only
image=/boot/vmlinuz
label="failsafe"
root=/dev/hdb7
initrd=/boot/initrd.img
append="failsafe devfs=nomount hdc=ide-scsi acpi=off"
read-only
other=/dev/hda1
label="windows"
table=/dev/hda
other=/dev/fd0
label="floppy"
unsafe

Add this stanza:

image=/boot/vmlinuz
label="Rh Linux"
root=/dev/hdb6
initrd=/boot/initrd.img
append="quiet devfs=mount hdc=ide-scsi acpi=off"
vga=788
read-only

Run "lilo" to apply the changes. This should work, but you may have to change a few things. For example, this stanza uses Mandrake's kernel (/boot/vmlinuz) and initrd (/boot/initrd.img), you may have to copy Red Hat's kernel & initrd to your Mandrake partition and use it for Red Hat's stanza for everything to work properly. For example, you would copy Red Hat's things to /boot/rh, and use "image=/boot/rh/vmlinuz" and "initrd=/boot/rh/initrd.img" instead of the "image=/boot/vmlinuz" and "initrd=/boot/initrd.img" for Red Hat's stanza.

i have done this ;

boot=/dev/hda
map=/boot/map
vga=normal
default="windows"
keytable=/boot/us.klt
prompt
nowarn
timeout=100
message=/boot/message
menu-scheme=wb:bw:wb:bw
image=/boot/vmlinuz
label="linux"
root=/dev/hdb7
initrd=/boot/initrd.img
append="quiet devfs=mount hdc=ide-scsi acpi=off"
vga=788
read-only
image=/boot/vmlinuz
label="linux-nonfb"
root=/dev/hdb7
initrd=/boot/initrd.img
append="devfs=mount hdc=ide-scsi acpi=off"
read-only
image=/boot/vmlinuz
label="failsafe"
root=/dev/hdb7
initrd=/boot/initrd.img
append="failsafe devfs=nomount hdc=ide-scsi acpi=off"
read-only
image=/boot/vmlinuz
label="RedHat"
root=/dev/hdb6
initrd=/boot/initrd.img
append="quiet devfs=mount hdc=ide-scsi acpi=off"
vga=788
read-only
other=/dev/hda1
label="windows"
table=/dev/hda
other=/dev/fd0
label="floppy"
unsafe

but failed, there's many line on boot process that has failed
and i tried this after copying the vmlinuz and initrd.img to /boot/rh/ but still failed ;

boot=/dev/hda
map=/boot/map
vga=normal
default="windows"
keytable=/boot/us.klt
prompt
nowarn
timeout=100
message=/boot/message
menu-scheme=wb:bw:wb:bw
image=/boot/vmlinuz
label="linux"
root=/dev/hdb7
initrd=/boot/initrd.img
append="quiet devfs=mount hdc=ide-scsi acpi=off"
vga=788
read-only
image=/boot/vmlinuz
label="linux-nonfb"
root=/dev/hdb7
initrd=/boot/initrd.img
append="devfs=mount hdc=ide-scsi acpi=off"
read-only
image=/boot/vmlinuz
label="failsafe"
root=/dev/hdb7
initrd=/boot/initrd.img
append="failsafe devfs=nomount hdc=ide-scsi acpi=off"
read-only
image=/boot/rh/vmlinuz
label="RedHat"
root=/dev/hdb6
initrd=/boot/rh/initrd.img
append="quiet devfs=mount hdc=ide-scsi acpi=off"
vga=788
read-only
other=/dev/hda1
label="windows"
table=/dev/hda
other=/dev/fd0
label="floppy"
unsafe

is there something wrong with that ?

Try getting rid of the "append=" and "vga=" lines in your Red Hat section, then post the errors you encounter, if any.

It's Working, i've made a mistake by renaming initrd-2.4.20-8.img to initrd.img, i should leave it.
Now i can boot both of it, thank you sooouw much aaa....:D

this is lilo.conf final ;

boot=/dev/hda
map=/boot/map
vga=normal
default="windows"
keytable=/boot/us.klt
prompt
nowarn
timeout=100
message=/boot/message
menu-scheme=wb:bw:wb:bw
image=/boot/vmlinuz
label="linux"
root=/dev/hdb7
initrd=/boot/initrd.img
append="quiet devfs=mount hdc=ide-scsi acpi=off"
vga=788
read-only
image=/boot/vmlinuz
label="linux-nonfb"
root=/dev/hdb7
initrd=/boot/initrd.img
append="devfs=mount hdc=ide-scsi acpi=off"
read-only
image=/boot/vmlinuz
label="failsafe"
root=/dev/hdb7
initrd=/boot/initrd.img
append="failsafe devfs=nomount hdc=ide-scsi acpi=off"
read-only
image=/boot/rh/vmlinuz
label="RedHat"
root=/dev/hdb6
initrd=/boot/rh/initrd-2.4.20-8.img
append="quiet devfs=mount hdc=ide-scsi acpi=off"
vga=788
read-only
other=/dev/hda1
label="windows"
table=/dev/hda
other=/dev/fd0
label="floppy"
unsafe