If you are talking about grub2 (not legacy) Yes, usually disk must be mounted because grub-install copies grub files to --root-directory for example grub-install --root-directory=/mnt /dev/sdb will copy grub files to /mnt/boot/grub and install grub to /dev/sdb (if /dev/sdb1 is mounted on /mnt)
You can also not use grub-install and use grub-mkimage to create core.img and then use grub-setup to write boot sector and then manually copy files to prefix dir. If you are talking abount grub-legacy, then i never used grub-install and manualy copied files and: grub> root (hd0,1) grub> setup (hd0) grub> quit I assume you can do this (and grub-install) on mounted partition too. _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel