Your retention policy is losing a race against your hardware
Zoltan sat in the small, windowless office behind the service counter and realized that the previous Friday had effectively ceased to exist. He had received the email from the corporate legal department at on a Thursday, which requested the preservation of all surveillance footage regarding a specific slip-and-fall incident.
When he accessed the system to isolate the files, he observed that the calendar icon for the previous Friday was grayed out and unresponsive. The recorder indicated that its earliest available data began at on Monday morning.
Because the storage device had reached its maximum capacity, it had performed its programmed duty of clearing the path for new information. This process is known as the overwrite cycle, which refers to the automated sequence where a recording device deletes the oldest stored video files to create space for incoming data streams once the hard drive is full.
The Invisible Math of Resolution
The disappearance of the footage was not a result of mechanical failure or human malice, but rather a consequence of the bitrate settings configured during the initial installation. Bitrate is the amount of data processed per unit of time in a digital video stream, and it directly determines the volume