ESV4 User’s Manual 105
The HDD space recycle function is turned on by default. You can alternatively turn it off and set a system event in "NVR Setup">>"Event Configurations">>"Event Trigger">>"Event Handling Settings">>"When NVR is triggered by", and set a desired disk remaining space for event trigger condition. You'd have to take action manually after you get the system event notification, such as replacing disk, turn on HDD recycle function, or backup recording data.
Users can also set to keep a previous number of days of recording data by enabling the option below. This is quite often used in application such as banking which certain countries requires to always keep a minimum previous number of days of recording data.
*If this option is enabled, once the hard drive is full, the recycle function will then start but it will ensure that the number of days of recording data defined here will stay in hard drive instead of wiping out 20GB of data at a time.
*If the hard drive is not full, the NVR
