diff -Nru grub-installer-1.32ubuntu1/debian/changelog grub-installer-1.32ubuntu2/debian/changelog
--- grub-installer-1.32ubuntu1/debian/changelog	2008-06-16 10:45:16.000000000 -0500
+++ grub-installer-1.32ubuntu2/debian/changelog	2008-08-06 19:40:14.000000000 -0500
@@ -1,3 +1,10 @@
+grub-installer (1.32ubuntu2) intrepid; urgency=low
+
+  * grub-installer: add support for writing an MBR on each disk in an
+    mdadm-managed RAID providing /boot (LP: #33649).
+
+ -- Dustin Kirkland <kirkland@ubuntu.com>  Wed, 06 Aug 2008 19:38:08 -0500
+
 grub-installer (1.32ubuntu1) intrepid; urgency=low
 
   * Resynchronise with Debian. Remaining changes:
diff -Nru grub-installer-1.32ubuntu1/grub-installer grub-installer-1.32ubuntu2/grub-installer
--- grub-installer-1.32ubuntu1/grub-installer	2008-06-16 10:22:17.000000000 -0500
+++ grub-installer-1.32ubuntu2/grub-installer	2008-08-06 19:54:23.000000000 -0500
@@ -349,6 +349,19 @@
 		$chroot $ROOT mount /proc
 		$chroot $ROOT dmsetup mknodes
 	fi
+# Check of the boot file system is on an mdadm device
+elif type mdadm >/dev/null 2>&1; then
+	frdisk_list=
+	md=$(findfs "/boot")
+	for frdisk in $(mdadm --detail "$md" 2>/dev/null | \
+			grep " active sync " 2>/dev/null | \
+			sed "s/^.* active sync\s*//" 2>/dev/null \
+	); do
+		# Build a list of devices in the mirror
+		frdisk_list="$frdisk_list $frdisk"
+		frdev=
+		frtype="mdadm"
+	done
 fi
 
 info "Identified partition label for $bootfs: $bootfslabel"
@@ -661,15 +674,14 @@
 else
 
 	# Semi-manual grub setup for Serial ATA RAID/multipath
-	info "Boot partition is on a Serial ATA RAID disk or multipath device"
-	info "Installing GRUB to $frdev; grub root is $disc_offered"
+	info "Boot partition is on a Serial ATA RAID disk, multipath, or mdadm device"
 	case $(archdetect) in
 	    i386/*)
 		stagedir=i386-pc ;;
 	    amd64/*)
 		stagedir=x86_64-pc ;;
 	    *)
-		error "Unsupported architecture for SATA RAID/multipath installation"
+		error "Unsupported architecture for SATA RAID/multipath/mdadm installation"
 		exit 1
 		;;
 	esac
@@ -680,6 +692,22 @@
 	mkdir -p $ROOT/boot/grub
 	cp $ROOT/usr/lib/grub/$stagedir/* $ROOT/boot/grub
 
+	if [ "$frtype" = "mdadm" ]; then
+		for frdisk in $frdisk_list; do
+			frdev=$(echo "$frdisk" | sed "s/[0-9]\+$//")
+			disc_offered=$frdev
+			frbootpart=${frdisk#$frdev}
+			frgrubroot=$((frbootpart-1))
+			write_grub
+		done
+	else
+		write_grub
+	fi
+
+fi
+
+write_grub() {
+	info "Installing GRUB to $frdev; grub root is $disc_offered"
 	# TODO: Check for errors during this process!
 	TERM=linux $chroot $ROOT \
         grub --device-map=/dev/null >/var/log/grub-${frtype}.log 2>&1 </dev/null <<EOF
@@ -689,8 +717,7 @@
 setup (hd0)
 quit
 EOF
-
-fi
+}
 
 # Split a device name into a disk device name and a partition number, if
 # possible.