As I have written before, there is a way to install ans use Dell OpenManage Server Administrator on vanilla Citrix XenServer. I have got it running on three production servers for five months now without issues. One is a R710, the others are PowerEdge 2950.
I've had to update the firmware of one RAID controller in order for it to work with OMSA. This was tricky, as there is no support for doing this in Linux. So I've had to use a Windows live CD, and upgrade the firmware from there. Worked like a charm.