CCTV Camera Pros Geovision 8.5 Multicam Digital Surveillance System - Manual (Page 570)

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11.8 Hot-Swap Recording
The program Media Man Tool provides a hot-swap feature, allowing a non-stop recording. You can add
and remove a hot-swap or portable hard drive to the GV-System without interrupting the monitoring.
When the new drive is added, it will be configured to the recording path automatically.
Additionally, you can back up ViewLog player and database files to play back at any computer.
Note: The hot-swap feature supports the disk capacity of 2 GB at least.