How to Solve NVR can’t detect HDD data issue.

  91   Network Recorders

【1】Product Model(Version)

Dahua Model: NVR5864-4KS2
Firmware Version: Dahua firmware

【2】Description of the problem

1. Client update the firmware to the last one, then can not check any data from hard disk.
2. Even do factory default and still same issue.

【3】Problem Processing (Root Cause)

1. The previous firmware is this one:
2. Previous firmware is work well with HDD.
3. After update the last firmware, issue happened.
4. Ask rnd because the old firmware is NVR3.0, and the last firmware is NVR4.0 CGI. So this two different have different file system.
5. So the last firmware can’t detect the HDD data.


1.     One solution is let customer downgrade to the old firmware.
2. Format the HDD, but the video data will be lose.