diff -Nru partman-partitioning-110ubuntu4.1/debian/changelog partman-partitioning-110ubuntu4.2/debian/changelog
--- partman-partitioning-110ubuntu4.1/debian/changelog	2017-01-12 11:57:03.000000000 -0500
+++ partman-partitioning-110ubuntu4.2/debian/changelog	2018-02-05 12:32:09.000000000 -0500
@@ -1,3 +1,10 @@
+partman-partitioning (110ubuntu4.2) xenial; urgency=medium
+
+  * Make get_real_device() both simpler and more generic.
+    (LP: #1733276) (Closes: #820818).
+
+ -- Eric Desrochers <eric.desrochers@canonical.com>  Mon, 05 Feb 2018 12:04:22 -0500
+
 partman-partitioning (110ubuntu4.1) xenial; urgency=medium
 
   * DASD-FBA drives should still use msdos partition table, and not dasd
diff -Nru partman-partitioning-110ubuntu4.1/lib/resize.sh partman-partitioning-110ubuntu4.2/lib/resize.sh
--- partman-partitioning-110ubuntu4.1/lib/resize.sh	2016-02-09 14:32:13.000000000 -0500
+++ partman-partitioning-110ubuntu4.2/lib/resize.sh	2018-02-05 12:04:14.000000000 -0500
@@ -19,15 +19,12 @@
 		num=$(sed 's/^[^0-9]*\([0-9]*\)[^0-9].*/\1/' $backupdev/$oldid/view)
 		bdev=$(cat $backupdev/device)
 		case $bdev in
-		    */disc)
-			bdev=${bdev%/disc}/part$num
+		    /dev/*[0-9])
+			bdev=${bdev}p$num
 			;;
-		    /dev/[hsv]d[a-z]|/dev/xvd[a-z])
+		    /dev/*)
 			bdev=$bdev$num
 			;;
-		    /dev/cciss/c[0-9]d[0-9]|/dev/cciss/c[0-9]d[0-9][0-9]|/dev/ida/c[0-9]d[0-9]|/dev/ida/c[0-9]d[0-9][0-9]|/dev/mmcblk[0-9])
-			bdev=${bdev}p$num
-			;;
 		    *)
 			log "get_real_device: strange device name $bdev"
 			return