DirectIP NVR keeps two copies of FW and NVR setup(configuration) images on its NAND memory. Usually its first copy is used for normal operation.

Once in a while NAND Flash Memory may fail, causing the unit to fail to boot up properly to load the linux/NVR apps. When a DirectIP NVR detects 20 consecutive booting failures, it switches its active partition to the second copy to load the FW/setup properly. (It takes about 45sec for a full booting for DR-4/6100, DR-4/6200 series, so 20 rebooting will take about 15 min or so)

First try pin hole reset and if the unit still continues to reboot, wait about 15 min or so.