Promise Pegasus2 R8 - simple and probably damn stupid question

I just got my new Promise Pegasus2 R8, run it the entire night so it can do its syncing stuff. What it finished I wanted to switch it off by unmounting it from the desktop and then pressing the unit's ON/OFF button. It didn't do the trick. I searched the web for the user manual - came up with nothing. HELP!

Found the answer:

shutting down the pegAsus2
The shuts down automatically if you turn off your Mac. If you want to turn off the Pegasus2 without shutting down your computer, follow the steps below.
To shut down the Pegasus2 unit:
1. Eject the Pegasus2 by right-clicking on the drive icon and choosing the Eject option.
2. Launch the PROMISE Utility and click on the Subsystem Information menu button at the top of the interface, unlock the user interface (see “Unlocking the UI” on page 15), click on the Shutdown button, then click on Shutdown in the new menu that appears. You will need to type “confirm” in the pop-up menu and click on the Confirm button.
Alternatively, you can press and hold the Power Button until the Power LED on the button turns orange. When you release the Power Button, the LED goes dark.