You can determine whether your virtual disk is in thick or thin format.
Launch the vSphere Client and log in to a vCenter Server system or an ESXi host.
- Select the virtual machine in the inventory.
- Click Edit Settings to display the Virtual Machine Properties dialog box.
- 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.
- Click OK.
What to do next
If your virtual disk is in the thin format, you can inflate it to its full size.