How is my VMWare disk is provisioned?

Here is the simplest way to check how your VMWare disks are provisioned.

Right click on your virtual machine and select edit, next select the disk you want to check. On the upper right under Disk Provisioning you will see Type: Thick Provision Eager Zeroed, Thick Provision Lazy Zeroed or Thin Provision.

Here is a screen capture from VMWare vShere client 5 showing Thick Provision Lazy Zeroed