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Guidelines for using high
camera count (>32) TVN
recorders
P/N 1073416-EN
• REV
A
• ISS
08FEB18
Introduction
When working with a large number (>32) of cameras per recorder, specific guidelines are
advised for hard drives, network settings, and event linking features to ensure optimal
performance of the TruVision recorder. Not following these guidelines may result in loss of
frames.
This document describes these guidelines.
They apply to TVN 2264P and TVN 70/71.
Hard drive configuration
The hard drives that we use in our recorders are especially designed for video surveillance
purposes and/or enterprise class installations.
Every hard drive however has specific limitations.
Due to the read/write speed limitations of the hard drive, the maximum advised number of
cameras per hard drive is 32 cameras with a maximum bit rate of 4Mbps/camera or a total bit
rate of 128Mbps.
The number of cameras will decrease if the camera resolution requires a higher bit rate.
Going above these limitations may result in sporadic video recording gaps.
We advise to use HDD Group Mode for non-
RAID configurations or RAID 5 or 6 for RAID
configurations.
A. For non-RAID configurations
The TVN 22P and TVN 70/71 have a feature called
HDD Group Mode
.
Use the HDD Group Mode and use at least four hard drives in a TVN 70/71 or at least two hard
drives in a TVN 2264P.
When there are more than 32 cameras on the recorder, we advise to assign not more than 32
cameras per group. Every camera can only be part of one group.
