Not sure, but that is 'logical' drive space vs. VMDK size.  The data points for VMDK sizes are in there as well, but not on that report.  It would most likely be a drag and drop report to show those sizes.
Our Foglight guys are trying to create a report (preferably a spreadsheet) that simply lists VMs and the total space allocated to each. They are having a tough time locating that particular metric in the list. I'm not sure if it's buried, if we're just not looking in the right place, or if it doesn't exist at all. Can anyone offer any guidance? I just find it hard to believe it just isn't something that can be reported on.  Product Information Version:​ ​5.6.7  Foglight​ Build: 5.6.7-201303161805-288890 Forge Version:5.6.7 Forge Build: 5.6.7-201303161805-288890 Forge UI Build: 5.6.7-201303092311-28
Reporting on Allocated space for VMs