Dahua NVR21-4KS3 Series User Manual page 213

Parameter
Redundancy
ANR
Period
Copy to
Description
If there are several HDDs installed to the Device, you can set one of
the HDDs as the redundant HDD to save the recorded files into
different HDDs. If one of the HDDs becomes damaged, you can find
the backup on the other HDD.
● Select Main Menu > STORAGE > Disk Manager, and then set a
HDD as redundant HDD.
● Select Main Menu > STORAGE > Schedule > Record, and then
select the Redundancy checkbox.
◇
If the selected channel is not recording, the redundancy
function will take effect the next time that you record,
whether or not you select the checkbox.
◇
If the selected channel is recording, the current recorded files
will be packed, and then start recording according to the new
schedule.
● This function is for some models only.
● The redundant HDD only backs up the recorded videos but not
snapshots.
You can set the ANR (auto network resume) function.
● The IPC continues recording once the NVR and IPC connection
fails. After the network becomes normal, the NVR can download
recording files while it is disconnected from the IPC. This is to help
protect against data loss from the current IPD channel that is
connected.
● Set the maximum recording upload period. If the offline period is
longer than the period you set, IPC will only upload the recording
file during the specified period.
Make sure that SD card is installed and the recording function is
enabled on the IPC.
Set a period during which the configured recording setting is active.
The system only activates the alarm in the defined period.
Click Copy to to copy the settings to other channels.
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User's Manual