Brickcom NR-2104 User Manual page 166

After the hard disk is ready, Log system starts to record the events of the
NVR and to provide basic information for troubleshooting. Six types of log
record are offered to check: Hardware Log, NVR Log, Event Log,
Current User, Historical User Log, and File Access Log.
Hardware Log
The log information in Hardware Log includes RAID creation, RAID deletion,
RAID modification, CPU, buzzer, fan, system, sensor and USB.
NVR Log
The log information in NVR Log includestime zone, daylight, system,
firmware upgrading, configuration IP, recording files export,and storage.
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