Backup to DR Device (RDA or VTL) logging errors such as 'Connection is reset by peer’ or 'Drive had channel error' (4037775)

NetVault 9.2 and 10.*

NetVault server operating system: windows 2008 R2

Binary log shows the RDA device having connection problems as below:

Error      2014/10/01 15:08:33        N/A        Media   NetVault-Server                               Failed to open a RDA connection to 'test.net.local'. Error Code 27. 'Connection refused'

Error      2014/10/01 15:08:33        N/A        Media   NetVault-Server                               Failed to open a RDA connection to 'test.net.local'. Please review the RDA device details.

Error      2014/10/01 15:08:33        N/A        Media   NetVault-Server                               Failed to bring device 'DR (Test) - test.net.local' online

Error      2014/10/01 15:08:42        N/A        Media   NetVault-Server                               RDA getattr_device failed 'Connection is reset by peer'

Error      2014/10/01 15:08:42        N/A        Media   NetVault-Server               RDA  getattr_device failed 'Connection is reset by peer'

Installed patch from Microsoft  Kb2764305

With Duplications We also see intermitant failures with   optimized replication between DR4100 as seen below:

Background        2014/10/02 00:03:14        152         Data Plugin         NetVault-Server               Source and Destination devices support file level replication

Error      2014/10/02 00:03:15        152         Data Plugin         NetVault-Server                               Replication failed 'Broken pipe'

Error      2014/10/02 00:03:15        152         Data Plugin         NetVault-Server                               Failed stopping optimised replication 'Broken pipe'