External Hdd; Disk Monitor - Nuvico EV-4000 Instruction Manual

8.4.4 EXTERNAL HDD

8.4.5 DISK MONITOR

Select the record policy of the external hard disk drive.
By default, the hard disk drive will overwrite from the
beginning when it becomes full.
By factory default, the DVR is consistently monitoring the
HDD for any malfunction and failures. You can manually
turn this function off.
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MPEG-4 DVR