LaCie 12big Rack Storage ServerUser Manual page 20Operation4.1. Powering On the EnclosureCAUTION: Do not operate the subsystem until the ambient tem-perature is within the specified operating range. If the drives havebeen recently installed make sure they have had time to acclimatizebefore operating them.1. Before powering up the enclosure make sure that all the mod-ules are firmly seated in their correct bays.IMPORTANT INFO: All drive and PSU apertures must be filled inorder for the enclosure to receive sufficient cooling. If a drive or PSUis not present, the aperture must be filled with a blank.2. Apply AC mains power to the enclosure.3. Press the enclosure on/off switch (see section 4.4.1. Ops PanelLEDs and Switches). The Power Active LED on the Ops Panelshould be lit (green) when the enclosure power button is pressed(and the disk drive motors should start).Unless otherwise configured through the enclosure managementfirmware, all drives in the enclosure should automatically start up.If this has not occurred one of the following conditions may exist:✦ There may be a power problem (an alarm and power faultindication would normally be indicated – see chapter 7. Trou-bleshooting and Problem Solving).✦ If there is only one PSU present, the drive motors will spin upin a delayed sequence.IMPORTANT INFO: If mains power is lost for any reason, onrestoration of power the enclosure will re-start automatically (unlessconfigured otherwise in the BIOS).4.2. Powering Off the Enclosure1. Shut down any applications that are running on the server.2. Shut down the operating system on the server.3. Remove all AC power cords from the enclosure.NOTE: Until the AC power cords are removed, the system will stillbe running in standby mode.IMPORTANT INFO: The enclosure will not be completely isolatedfrom the power source unless both power cords are disconnected.4.3. Drive Anti-Tamper LocksAnti-tamper locks are fitted in the drive carrier handles.4.3.1. Activating the Locks1. Carefully insert the Torx driver provided into the anti-tamperlock in the handle (see Fig. 21).2. Rotate the key in a clockwise direction until the indicator is vis-ible in the aperture beside the key.Fig. 21 - Activating the Anti-tamper Lock3. Remove the key.4.3.2. De-Activating the Locks1. Carefully insert the Torx driver provided into the anti-tamperlock in the handle.2. Rotate the key in a counterclockwise direction until the indicatoris no longer visible in the aperture beside the key.3. Remove the key.NOTE: A drive carrier cannot be installed if its anti-tamper lock isactivated outside the enclosure.4.4. LEDs and Controls4.4.1. Ops Panel LEDs and SwitchesThe Ops Panel LEDs (Fig. 22) fault and status conditions are definedin Table 04 while the functions of the push-button switches are de-fined in Table 05.4. Operation