Is Time Machine supported on the Network drive?
Yes. To enable Time Machine on your Network drive, log in to your Dashboard and select the “Users” widget. From there, your can enable Time Machine either on a specific user, or on OpenShare. Please bear in mind that OpenShare is accessible to all users connected on the local network. Once time machine is enabled, open the Time Machine preference pane on your Mac, choose “Change Disk” and select your newly created Time Machine folder on the Network drive. Time Machine will eventually ask for login credential if the functionality was enabled on a private share.