How to check if a VM disk is Thick or Thin provisioned

There are multiple ways to tell if a virtual machine has thick or thin provisioned VM Disk. Below are some of the ways I am able to see this information:
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Understanding Resource Pools in VMware

It is my experience that resource pools are nearly a four letter word in the virtualization world. Typically I see a look of fear or confusion when I bring up the topic, or I see people using them as folders. Even with some other great resources out there that discuss this topic, a lack of education remains on how resource pools work, and what they do. In this post, I’ll give you my spin on some of the ideals behind a resource pool, and then discuss ways to properly balance resource pools by hand and with the help of some PowerShell scripts I have created for you.
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