Advice: Start with OES 11 using the latest SP, as OES 2 is pretty old.
Also, document what your server will be doing. Adding extra partitions to a server without a specific purpose is likely overkill. If a file server, you'll need NSS, but other than that you can likely, almost always, just have a couple of partitions and be completely safe (I'd have /boot and / and be done; most others would also have swap in there taking a couple GB of space).
-- Good luck.
If you find this post helpful and are logged into the web interface, show your appreciation and click on the star below...