Power Edge R710 - checking RAID configuration

Hi, all.
I have a Dell Power Edge R710 server. The configuration was done before shipped to site and it was not altered any time until now, as far as I know.
I don't know whether it has been configured RAID or not. So, how can I check it? The OS is windows Server 2003 SP2 (32-bit).

Can someone help?
Thank you so much.