Dahua NVR21-4KS3 Series User Manual page 38

No. Name
1 Power button
System HDD
2
Indicator light
Alarm indicator
3
light
Network indicator
4
light
5 USB port
6 16 HDD slot
After you remove the front panel, you can see there are 16 HDDs. From the left to the right and from
the top to the bottom, it ranges from 1-4, 5-8, 9-12, 13-16.
You can see there are two indicator lights on the HDD bracket.
● The power indicator light is at the top. The light is yellow after you connected the device to the
power.
● The read-write indicator light is at the bottom. The blue light flashes when system is reading or
writing the data. In addition to flashing blue light, read-write operation lights of some models of
devices further include the following states. Please refer to the actual device.
◇
Stead red: HDD failure (HDD error).
◇
Flash red: HDD is in a RAID rebuild state.
Figure 2-29 Front panel
Table 2-14 Icons
Function
Press it once to turn on the device.
Press it for a long time to turn off the device.
● We do not recommend you turn off the device in this
way.
● Press power button for a long time or pull out the
power cable might result in device auto restart.
The blue light becomes on after system booted up
properly.
In the system HDD, there are device important
configuration file, factory default configuration file,
device initial boot up data.
The alarm indicator light becomes on once an alarm
occurred. It becomes on via the software detection. The
indicator light becomes on when there is a local alarm.
The blue network indicator light is on after you
connected the device to the network.
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User's Manual