Uboot Upgrading; Intelligent Diagnosis; Usb Device Auto Pop-Up - Dahua NVR21-4KS3 Series User Manual

5.19.4.4.3 Uboot Upgrading

● Under the root directory in the USB storage device, there must be "u-boot.bin.img" file and
"update.img" file saved, and the USB storage device must be in FAT32 format.
● Make sure the USB storage device is inserted; otherwise the upgrading cannot be performed.
When starting the Device, the system automatically checks whether there is a USB storage device
connected and any upgrade file, and if yes and the check result of the upgrade file is correct, the
system will upgrade automatically. The Uboot upgrade can avoid the situation that you have to
upgrade through +TFTP when the Device is halted.

5.19.4.5 Intelligent Diagnosis

When exception occurs, export data to check details
Background Information
Select Maintenance Center > Intelligent Diagnosis.

5.20 USB Device Auto Pop-up

After you inserted the USB device, system can auto detect it and pop up the following dialogue box.
It allows you to conveniently backup file, log, configuration or update system.
You can add a USB keyboard through USB port, and it can input characters limited to soft keyboard.
Figure 5-327 Intelligent diagnosis
Figure 5-328 USB device prompt
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