Dahua XVR User Manual page 248

Here is for you to select working mode when hard disk is full. There
HDD full
are two options: stop recording or rewrite. If current working HDD is
overwritten or the current HDD is full while the next HDD is no empty,
then system stops recording, If the current HDD is full and then next
HDD is not empty, then system overwrites the previous files.
Here is for you to specify record duration. The value ranges from 1 to
Pack
120 minutes. Default value is 60 minutes.
duration
4.8.5.1.2 Date and time
The date and time interface is shown as in Figure 4-93.
Please refer to the following sheet for detailed information.
Parameter Function
Here you can select date format from the dropdown list.
Date format
There are two options: 24-H and 12-H.
Time
Format
The time zone of the device.
Time zone
It is to set system time. It becomes valid after you set.
System
time
Sync PC You can click this button to save the system time as your PC current
time.
Figure 4-93
239