Let's say we want to resize the VMDK that is given to a virtual machine. By going into Edit Settings of the VM, we cannot decrease the disk size. Changing the value with Edit Settings of the VM holds good if you are trying to increase the Guest's Disk space. If we want to shrink the VMDK, then it is best we use vCenter Converter Standalone. VMware vCenter Converter Standalone is used if you want to perform a physical to virtual conversion or if you want to convert a Virtual machine to a Virtual machine. Another important feature of this is, if you want to migrate a VM From Oracle VM Manager to vCenter, Converter Standalone can get this job done. In this example here, I am using a 5.5 Update 3 vCenter with a 5.5 Update 3 ESXi host. The converter version used here is 6.0 and the guest OS to be converted is Windows 2008 R2. You need to check the release notes of the converter to make sure that the converter supports the Guest OS of the machine that is about to be converted. Re