diff --git a/content/4.md b/content/4.md
index 69ee8ce..364b951 100644
--- a/content/4.md
+++ b/content/4.md
@@ -6,3 +6,8 @@ type = "post"
 +++
 
 Now that you're in the know, get to making and checking a backup of your data, before you lose it!
+
+More information can be found on the following pages:
+
+http://blog.open-e.com/why-raid-is-not-a-backup/
+http://serverfault.com/questions/2888/why-is-raid-not-a-backup