diff -upr a/util/grub-install.in b/util/grub-install.in
--- a/util/grub-install.in	2008-08-11 12:48:18.000000000 -0500
+++ b/util/grub-install.in	2008-08-11 12:48:32.000000000 -0500
@@ -187,6 +187,11 @@ convert () {
     # If not found, print an error message and exit.
     if test "x$tmp_drive" = x; then
 	echo "$1 does not have any corresponding BIOS drive." 1>&2
+	# If /boot is on a RAID device, provide more information
+	if mdadm --detail "$bootdir_device" >/dev/null 2>&1; then
+	    echo "You can run grub-install on your RAID device [$bootdir_device]," 1>&2
+	    echo "or you can define [$1] in [$device_map]." 1>&2
+	fi
 	exit 1
     fi
 
@@ -410,6 +415,10 @@ if test -n "$tmp"; then
     exit 1
 fi
 
+# Get the root drive.
+root_device=`find_device ${rootdir}`
+bootdir_device=`find_device ${bootdir}`
+
 # Check for INSTALL_DEVICE.
 case "$install_device" in
 /dev/*)
@@ -431,10 +440,6 @@ case "$install_device" in
     exit 1 ;;
 esac
 
-# Get the root drive.
-root_device=`find_device ${rootdir}`
-bootdir_device=`find_device ${bootdir}`
-
 # Check if the boot directory is in the same device as the root directory.
 if test "x$root_device" != "x$bootdir_device"; then
     # Perhaps the user has a separate boot partition.
@@ -524,11 +529,31 @@ fi
 sync
 
 # Now perform the installation.
-$grub_shell --batch $no_floppy --device-map=$device_map <<EOF >$log_file
+if echo "$install_device" | grep -qs "^/dev/md[0-9]" 2>/dev/null; then
+	# installing to an md device; write an MBR to each disk in the RAID
+	echo -n > $log_file
+	for frdisk in $(mdadm --detail "$install_device" 2>/dev/null | \
+			grep " active sync " 2>/dev/null | \
+			sed "s/^.* active sync\s*//" 2>/dev/null \
+	); do
+		dev=$(echo "$frdisk" | sed "s/[0-9]\+$//")
+		echo "Installing GRUB to $dev as $install_drive..."
+		$grub_shell --device-map=/dev/null <<EOF >>$log_file
+device $install_drive $dev
+root $install_drive
+setup --stage2=$grubdir/stage2 --prefix=$grub_prefix $force_lba $install_drive
+quit
+EOF
+	done
+else
+	# traditional case, normal grub installation
+	echo "Installing GRUB to $install_device as $install_drive..."
+	$grub_shell --batch $no_floppy --device-map=$device_map <<EOF >$log_file
 root $root_drive
 setup $force_lba --stage2=$grubdir/stage2 --prefix=$grub_prefix $install_drive
 quit
 EOF
+fi
 
 if ${xfs_frozen} ; then
   xfs_freeze -u ${grubdir}