Dahua NVR100 series User Manual page 210


Pre-record: System can pre-record the video before the event occurs into the file. The value
ranges from 1 to 30 seconds depending on the bit stream.

Redundancy: System supports redundancy backup function.
recorded file in two disks. You can highlight Redundancy button to activate this function.
Please note, before enable this function, please set at least one HDD as redundant. (Main
menu->Setting->Storage->HDD Manager). Please note this function is null if there is only
one HDD.

ANR: It is to save video to the SD card of the network camera in case the network
connection fails. The value ranges from 0s～43200s. After the network connection resumed,
the system can get the video from the SD card and there is no risk of record loss.

Period setup: Click button
as in Figure 4-32.There are five record types: regular, motion detection (MD), Alarm, MD &
alarm and IVS.
Please following the steps listed below to draw the period manually.
a) Select a channel you want to set. See Figure 4-33.
b) Set record type. See Figure 4-34.
after one date or a holiday, you can see an interface shown
Figure 4-32
Figure 4-33
Figure 4-34
It allows you backup
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