The backup of Vmware Virtual Machine using the SAN transport mode fails with the error:
Error 2011/12/02 11:05:34 139 Data Plugin av3 Failed to open virtual disk
The same backup will work if the "nbd" (lan) transport mode is used
At the time of writing this article, Vmware VDDK 1.2.x is used with the Netvault Vmware plugin. This version of the VDDK does not support SAN transport mode on Linux platforms with the exception of Redhat.
Future release of the Netvault Vmware plugin will implement VDDK 5 (the vSphere version). With this version, Linux or some linux platforms may be supported.
In the meantime, if SAN transport must be used, the workaround is to install theplugin on a netvault client running on supported platform (windows, Redhat).
Note that the netvault client where the plugin is installed must have access to FC SAN.
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