NT2 U3e System Setup
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2.2 Replacing Hard Drives
When a drive fails, the corresponding HDD LED (A or B) will be blinking slowly, unless the RAID
mode is set to Non-RAID, in which case the HDD will simply not be accessible anymore.
If only one drive is defective and the RAID mode is set to RAID 1, the data can still be accessed
but we strongly recommend replacing the faulty drive immediately to assure continued proper
backup and data safety.
If more than one drive at the same time fails or if the RAID mode is set to RAID 0, the data will be
lost and the system can not be accessed again until the drive(s) have been replaced.
2.2.1 Non-RAID
1. Check the HDD LED. The corresponding LED for the defective drive will be blinking slowly.
2. Turn off the power and replace the faulty drive(s).
3. Turn on the power. The corresponding LED will turn a steady green again.
4. Format the new drive(s).
2.2.2 RAID 0
1. Check the HDD LED. The corresponding LED for the defective drive will be blinking slowly.
2. Turn off the power and replace the faulty drive(s).
3. Turn on the power. The corresponding LED will turn a steady green again.
4. Push the button above the RAID switch to confirm the current RAID mode.
5. Format the drive.
2.2.3 RAID 1
1. Check the HDD LED. The corresponding LED for the defective drive will be blinking slowly.
2. Turn off the power and remove the faulty drive.
3. Make sure the USB cable is plugged in and connected to your computer.
4. Turn on the power and wait for about 30 seconds for the system to start up.
5. Install the new hard drive.
6. The LED of the source drive will start to blink rapidly and the LED of the destination drive
will start to blink slowly. This indicates that it is now rebuilding the RAID array.
7. Rebuilding the RAID array will take several hours, depending on the drive capacity. When
the data has been restored, the LEDs will turn a steady green.
Note
We recommend not turning off the power during the rebuild process but if the process is
interrupted, it will continue rebuilding the data as soon as the power is turned back on.
