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• Power down the system
• If the rack environment or the ES NAS location is hard for performing maintenance service,
remove the ES NAS from the rack. Reverse rack mounting procedure to remove the ES NAS from
the rack. Please refer to the next chapter: Quick-Deploy Rack kit installation for details.
Powering Down the ES NAS
WARNING: To reduce the risk of personal injury, electric shock, or damage to the device, remove
the power cord to completely remove power from the ES NAS. The front panel Power-On button does
not completely shut off system power.
IMPORTANT: If installing a hot-plug device, it is not necessary to power down the ES NAS. Use the
following procedure to completely remove the power:
1. Back up the system data.
2. Shut down the system with the shut-down function from QES as instructed by the Software User
Manual.
3. The system power LED on the front of the system should be off now.
4. Disconnect the power cords.
The system is now without power.
Replacing the battery backup unit (BBU)
Batteries can be replaced only when the LED indicates that they have failed, or by the QES’s warning of
possibility of failure.
Each Storage Controller contains one battery backup unit (BBU). To remove the BBU:
Note: If the battery module is installed, be sure the battery LED on the battery module is not blinking. If
the battery LED (refer to Rear Panel LEDs and Buttons in Chapter 3: System Components) is blinking, the
battery module is backing up data. Wait until the LED stops blinking before continuing with the
procedure.
1. Release the lock by pressing the battery module’s handle. Remove the battery module by sliding it out
from the Storage Controller.
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