Thunderbolt technology devices are plug and play, allowing you to connect and disconnect them while the computer is running. To prevent potential disk problems, it is important to properly eject the Thunderbolt storage volume(s).
LED button: The Thunderbolt enclosure will power down the disks when the front LED button is pushed. Please note that Thunderbolt devices daisy-chained to the enclosure will continue to work. See Receiving Power/LED Power Button.