/etc/lilo.conf:

disk=/dev/sda
    bios=0x80
disk=/dev/sdb
    bios=0x81
vga=0x317
map="/boot/map"
lba32
prompt
timeout=100
install="menu"
default="ALTLinux"
append=""
boot="/dev/md1"
raid-extra-boot="/dev/sda,/dev/sdb"
image="/boot/vmlinuz"
    label="ALTLinux"
    initrd="/boot/initrd.img"
    root="/dev/md1"
    read-only

image="/boot/vmlinuz"
    label="NORAID"
    initrd="/boot/initrd-2.6.18-std-smp-alt4.img"
    root="/dev/sda1"
    read-only

image="/boot/vmlinuz"
    label="failsafe"
    initrd="/boot/initrd.img"
    root="UUID=a5f7fa8f-223f-4cd5-8f4d-59b4d7d72228"
    addappend="failsafe"
    vga="normal"
    read-only



[root@obelix /]# lilo
Fatal: Not all RAID-1 disks are active; use '-H' to install to active disks only
[root@obelix /]# lilo -H
Warning: Partial RAID-1 install on active disks only; booting is not failsafe

Warning: Faulty disk in RAID-1 array; boot with caution!!
Warning: device outside of RAID set  /dev/sda  0x0800
Warning: device outside of RAID set  /dev/sdb  0x0810
Fatal: Unusual RAID bios device code: 0xFF