GeoVision GV-EBX1100 Series Firmware Manual page 201

WARNING: The interruption of power supply during updating causes not
only update failures but also damages to the camera. In this case,
please contact your sales representative and send your device back to
GeoVision for repair.
7. Do not turn the power off within 10 minutes after the firmware is
updated.
8. If firmware upgrade fails, manually restore the camera to its default
settings. For details, see Loading Factory Default in the corresponding
Hardware Manual.
9. Since the firmware adopts different storage format from V2.07 onward,
be sure to re-format the memory card after firmware upgrade. If you
have not done so, this warning message appears when you view the
Monitoring or Storage Settings' Web interface:
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Figure 6-1