root@ubuntu:/# grub-install /dev/sda
/usr/sbin/grub-probe: error: raid5rec is not loaded.
Auto-detection of a filesystem module failed.
Please specify the module with the option `--modules' explicitly.
root@ubuntu:/# grub-install --modules=raid5rec /dev/sda
/usr/sbin/grub-probe: error: raid5rec is not loaded.
Installation finished. No error reported.