You can determine whether your virtual disk is in thick or thin format.

1

Select the virtual machine in the inventory.

2

Click Edit Settings to display the Virtual Machine Properties dialog box.

3

Click the Hardware tab and select the appropriate hard disk in the Hardware list.

The Disk Provisioning section on the right shows the type of your virtual disk, either Thin or Thick.

4

Click OK.

If your virtual disk is in the thin format, you can inflate it to its full size.