Don't fail during zerodisk
diff --git a/ubuntu-14.04/scripts/zerodisk.sh b/ubuntu-14.04/scripts/zerodisk.sh
index 4daf0e8..6a658ed 100644
--- a/ubuntu-14.04/scripts/zerodisk.sh
+++ b/ubuntu-14.04/scripts/zerodisk.sh
@@ -1,2 +1,2 @@
-dd if=/dev/zero of=/EMPTY bs=1M
+dd if=/dev/zero of=/EMPTY bs=1M || true
 rm -f /EMPTY