For the Windows boxes is the data returned by Windows tools any more accurate (perfmon wmi etc.)?. As these can be incorporated into the Portal. Just a thought.
Oddly enough the Windows boxes are reporting correctly.
but, no Perfmon is not turned on on these Windows Servers.
How does the data actually differ ? Can you give us some samples ? Also please define the type of virtualization (aix,sol,vmware, etc.)
Oh, again you have a more detailed explanation in this thread , please use that one only