http://www.linuxquestions.org – I am creating 6 vm's using Linux based vSphere ESX 4.0, 3 xp machines and 3 server 2008 machines. On one of the server 2008 machines, the C: drive shows 14.9 GB total size with 1.06 GB free. But, in the vSphere client I have 34.00 GB provisioned with over 27 GB of that being used for that vm. (HowTos)