Knoppix:/# grub-install --root-directory=/boot /dev/hdb
/dev/hdb does not have any corresponding BIOS drive.
Knoppix:/# grub-install --root-directory=/boot /dev/hda
/dev/hda does not have any corresponding BIOS drive.
Knoppix:/# grub-install --root-directory=/boot /dev/hdc
Could not find device for /boot/boot: Not found or not a block device.
Knoppix:/# grub-install --root-directory=/boot /dev/hdd
Could not find device for /boot/boot: Not found or not a block device.