Use the LaCie Network Configurator. You will see all of the related information about your LaCie Ethernet Disk on the right panel of the configurator: when you open the LaCie Network Configurator, you will see a list of all of the NAS servers running on your network. When you browse through this list, all of the related information about the network, including IP addresses, will be displayed in the right panel of the window.
Important Info: If you are operating in a Windows environment, you can use a command prompt to perform this function, instead of using the LaCie Network Configurator. Open a command prompt, and type: “ping [nas_name]”, and you will see the LaCie Ethernet Disk’s IP address.