Chapter 4. LED and Alarm Buzzer Specifications
The LED indicators of the NAS indicate the system status and information. When the NAS
is turned on, check the following items to make sure the system status is normal. Note
that the following LED information is applicable only when users have properly installed the
hard drive, and connected the NAS to the network and the power supply.
LED Color LED Status Description
Flashes green
and red
alternately
every 0.5 sec
1. The hard drive on the NAS is being
formatted
2. The NAS is being initialized
3. The system firmware is being updated
4. RAID rebuilding is in process
5. Online RAID Capacity Expansion is in
process
6. Online RAID Level Migration is in process
Red
1. The hard drive is invalid
2. The disk volume has reached its full
capacity
3. The disk volume is going to be full
4. The system fan is out of function
5. An error occurs when accessing
(read/write) the disk data
6. A bad sector is detected on the hard drive
7. The NAS is in degraded read-only mode
(2 member drives fail in a RAID 5 or RAID
6 configuration, the disk data can still be
read)
8. Hardware self-test error
Flashes red
every 0.5 sec
The NAS is in degraded mode (one member
drive fails in RAID 1, RAID 5 or RAID 6
configuration)
Flashes green
every 0.5 sec
1. The NAS is starting up
2. The NAS is not configured
3. A hard disk drive is not formatted
Green The NAS is ready
System
Status
Red/
Green
Off
All the hard disk drives on the NAS are in
standby mode
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