Work with SDE 10 and ArcGis Server 10.1

I'll upgrade my Gis Server from 10.0 to 10.1.
At this moment I have SDE 10 installed on a server(with oracle Release 11.2.0.2.0),
I want to install ArcGis Server in a different server, is it a problem?, can I still connected to my SDE(and data) running in version 10?

I mean, I want to serve map-servicea in ArcGis Server 10.1, but I want to know if it is possible to still working with SDE 10(on a different server).

Thank you.