User manual
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 you have
properly installed the HDD, and connected the NAS to the network and the power
supply.
LED Colour 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 initialised
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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