When upgrading NVR from v3.4.x to v4.x, please be sure NVR firmware is at v3.4.92 170518 firmware and perform system factory default before proceed upgrading NVR to v4.x. Failures have NVR at v3.4.92 and perform system factory default prior to upgrading NVR to v4.x could render NVR inoperable.
New Logical and Visualized GUI Design
Professional Embedded Hardware and Software, and Pioneering Dual-OS Design To Ensure System Reliability
Redundant Power Supply To Improve System Stability
Configurable HDD Hot Swap with RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10 Storage Scheme
Normal or Hot Spare Working Mode Configurable To an N+1 Hot Spare System
