3.3.7 Sensor Alarm Record ModeUsers can use sensors to trigger Sensor Alarm Record mode for corresponding channels. In this mode, theRecord Status indicator light in the ALARM section will turn red.3.3.8 Recycling RecordYou can enable the Recycling Record function and set the recording storage sequence for HDD partitions.The recording storage will automatically jump to the next partition when it is full. If all the partitions arefull and Recycling Record mode has been enabled, the new data will overwrite the oldest recorded dataautomatically. Please refer to chapter 4.1 for details.You can also set the HDD Minimum Storage alarm. When the current storage space is less then theminimum storage level set and Recycling Record mode has not been enabled, record will automaticallystop. Please refer to chapter 4.5 for details.15 XUSB4DVR User Guide