I tried to add a new VM on a new experimental Xen server, and got as far as allocating storage, but was unable to find a drive to store the image on.
The Local Storage option, which is visible in XenCenter, is not visible when managing this server though OpenXenManager. Since that's the only storage option available to this machine, I could not create a VM.
I don't understand why Local storage is not visible when the other storage types are, including ISO repositories. Perhaps they are listed differently or using a different API call? This is on XenServer 6.0.2.