We’ve had this error on ESX 3.5 and 4.0 hosts, both ESX and ESXi.
When trying to add a new NFS datastore we get the above error message, both in the vSphere Client and when using the command-line tools.
Logging on to the Service Console on an affected host, “esxcfg-nas -l” also results in the same error.
The cause is invalid [...]
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