Exclude disks from backups: an example to avoid
You should use the options on the Exclude Disks tab of the Change Policy dialog box with care. For example, if you add a disk to the virtual machine and change the settings that exclude disks, note: The next backup may not capture the virtual machine in the state that you intended. You should back up the entire virtual machine (that is, do not exclude any disks) before you exclude a disk from future backups.