After the link grub told me that it couldn't find /usr/share/grub/i386-redhat I tried to symlink again :o) but I got something like "can not link. Read-only filesystem" However, chroot seems a good way to reinstalling grub. Command should be chroot /mnt/sysimage /mnt/sysimage/sbin/grub-install Am I right ? If it doesn't work, I am thinking on installing a FC3 on another HD in the new computer, and later move filesystem from old hd to the new one :) Thank you very much for your help ! -- This is an email sent via the webforum on http://fcp.homelinux.org http://fcp.homelinux.org/modules/newbb/viewtopic.php?post_id=49188&topic_id=12422&forum=6#forumpost49188