I have the Dell R710 for months. It is perfect to fit my needs.
Here are some documents I downloaded before and used as a reference. Now, I upload them to this blog as a backup. Just in case I need it again and I can not find them anywhere.
How to connect iDRAC of Dell Server?
PowerEdge R710 owner’s manual in Chinese.
PowerEdge R710 Setup Guide
PowerEdge R710 Technical Guide
Support Live Image version 3.0 User’s Guide