QNAP VS-2004L en - Manual (Page 31)

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2.5 Check System Status
LED Display & System Status Overview
LED Color LED Status Description
System
Status
Red/
Green
Flashes green
and red
alternately
every 0.5 sec
1) A hard drive on the NVR is being formatted
2) The NVR 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) A 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 NVR 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 NVR 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 NVR is starting up
2) The NVR is not configured
3) A hard drive is not formatted
Green The NVR is ready
Off
All the hard drives on the NVR are in standby
mode
LAN Orange
Orange The NVR is connected to the network
Flashes
orange
The NVR is being accessed from the network
10 GbE* Green (Reserved)
HDD (Hard
Drive)
Red/
Green
Flashes red
The hard drive data is being accessed and a
read/write error occurs during the process