I'm trying to build a report that uses the SUM function to rollup stats for a group of servers. The end result is a listing showing the SUM for memory, disk and CPU for all of the servers in the group.
This works just fine for things like "Total Memory Used", which adds up the memory across all servers, but when I try to SUM on "Volume Space Used" the report is adding up all fixed disks, virtual memory, and physical memory. I'd like to SUM just the disk space without the memory, but I haven't been able to get this to produce the right results. Any help would be appreciated.