Ah!
voila ce que je viens de faire
%modprobe dm-mod
%vgchange -ay
%mkdir -p /mnt/root
%mount /dev/VolGroup00/LogVol00 /mnt/root
%mount /dev/VolGroup00/LogVol02 /mnt/root/usr
%mount /dev/VolGroup00/LogVol03 /mnt/root/usr
%chroot /mnt/VolGroup00/LogVol00 /bin/bash
#grub-install --root-directory=/boot /dev/sda
Probing devices to guess BIOS drives. this may take a long time.
No suitable drive was found in the generated device map
Autre tentative
%modprobe dm-mod
%vgchange -ay
%mkdir -p /mnt/root
%mount /dev/dm-0 /mnt/root
%mount /dev/dm-1 /mnt/root/home
%mount /dev/dm-2 /mnt/root/usr
%chroot /mnt/root /bin/bash
#grub-install --root-directory=/boot /dev/sda
No suitable drive was found in the generated device map
#ls /dev/
mapper null VolGroup00
avec la console grub
find /grub/stage1
(hd0,0)
Bon comment gérer les partitions à l'intérieur d'un LVM?