NetVault Server was installed on a physical Windows 2008 machine and the NetVault Client was installed on a Dell Blade machine with ESXi 4.1 installed i.e. a virtual Client.
The Client backup was from a SQL 2005 Express version to a VTL that is attached to the NetVault Server via network.
The VTL media was ready for the backup and then the backup fails with the following error after 23 seconds:
Error 2012/03/05 01:00:24 84 Jobs NV-MON-TRT Fatal error: Backup aborted
NetVault Server communicates to the Client via port 20031 and 20032 on UDP and TCP, as well as vice-versa. Then the Clients communicate via a random port to the backup device in order to backup the data.
If any of these channels are disconnected or not received in time, then the backup will fail.
We therefore made the following changes to improve the network reliability within NetVault Configurator, whilst a backup maybe idle for a while...
For the NetVault Server AND Client:
“Network Manager” tab within the Configurator, look for "Time wait before dropping inactive connection" and set this up from 300 to 600.
Also look for “Keep Alive Rate” and set this from 15 to 7.
“Time in second to complete connection” from 30 to 60.
“Time between availability broadcasts” from 300 to 600.
“Time between security broadcasts” from 300 to 600.
NetVault Configurator setup for NetVault Server ONLY:
“Job Manager” tab, set "Job keep alive rate" to 1.
Since the Client resides on an ESXi Server, we made sure the following commands are entered on the ESX Server to allow the communications for NetVault:
Unfortunately the above settings didn't resolve the issue.
The Windows Firewall on the NetVault Server was the case, as was blocking the communication between the NetVault Server and the Client.
Please make sure that the Windows Firewall has been disabled on the NetVault Server and all Clients.