Instruction manual

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8.6 NVVR maintenance advices
The NVVR is a video recording system. Due to the importance of the stored data, users should follow some steps
to keep the system in good conditions :
 The PC where the NVVR is running mustn’t be closed abruptly.
 The NVVR process mustn’t be closed abruptly.
 The hard disk where the video is going to be recorded must have high performance, ideally a RAID
configuration.
 It’s not recommendable to install high cpu consumption sofware in the same PC (such as antivirus).
 It’s not recommendable to set the recording path in the same hard disk where the operating system is
installed.
If the NVVR is closed abruptly, the recording indexes might be corrupted. If so, the NVVR might slow down
certain operations such as start-up or closing down.
8.7 Special scenario : two NHServers connected to the same NVVR
In some network architectures, it’s suitable to connect two NHServers to the same NVVR. Usually, one NHServer
is connected in the same LAN of the NVVR (for supporting local NHClients) and another NHServer is connected
remotely through a broadband (for supporting remote NHClients). See below a typical diagram :
Administrators must keep in mind that both NHServers and the NVVR store information about the recording
cameras so, in this scenario, administrators must follow some important considerations in order to avoid
database inconsistences. The steps to follow are :
1. Add the NVVR in one of the NHServers (for example, let’s say NHServer1). Read the section where adding
the NVVR is explained for more details.
2. Add the recording cameras to the NVVR through that NHServer. Read the section where adding cameras
to the NVVR is explained for more details.
3. Once all cameras were added, the NVVR can be added to the other NHServer (NHServer2 in this case).
4. If any kind of configuration on the cameras of the NVVR must be done (add or delete or replace cameras,
change the ip address,etc), firstly, remove the NVVR from one of the NHServer (let’s say NHServer2). Later
on, change the configuration through the NHServer1 and ,once the changes are done, add the NVVR again
to the other NHServer (NHServer2).
8.8 Automatic dvr reconnection
NHServer tries to reconnect disconnected dvrs but only in case the dvr was disconnected after NHServer was
started-up. However, if the dvr was already unreachable when NHServer was started-up, it won’t be
reconnected automatically. In that case, users will have to connect it manually from Monitor.
Under very unstable networks (for example wireless) , this automatic process might reduce the NHServer
stability. In those cases, it is recommendable to disable this automatic reconnection process. In order to do it,
follow the next steps :