troubleshooting Question

Not possible anymore to mount NFS store on vShpere 4.1

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RBraatFlag for Netherlands asked on
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I'm running a vsphere 4.1 environment with 2 host, controlled by vCenter with vmotion in place.
Both bosts have their own local datastore and share a NAS datastore, connected with NFS. This nas is a QNAP TS-459 Pro II with IP and the NFS share is /ESX.

This configuration was working without problems for over half a year now. Yesterday I installed VMwareDataRecovery-, both the appliance and the plugin.
Backing up the VMs is working.

After this, I stopped all VMs on my second host ( and rebooted it. After booting up, the NFS store could not be mounted, so I removed it and tried to add it again. Used the same information as I did in the past:
folder: /ESX
Name: NAS

Now I receive an error message:

Call "HostDatastoreSystem.CreateNasDatastore" for object "ha-datastoresystem" on ESXi "" failed.
Operation failed, diagnostics report: Unable to complete Sysinfo operation.  Please see the VMkernel log file for more details.

Nothing in the configuration changed, except for installing VMwareDataRecovery as described. I tried to add the NFS store from another management computer which I did not use for installing VMwareDataRecovery, but the error message is the same.

After that I uninstalled the VMwareDataRecovery plugin and stopped the VMwareDataRecovery appliance. Still not possible to add the NFS storage.

So I think the installation of VMwareDataRecovery was not the cause of the problem.

What is strange is than on the other host the NFS store is still in place and working. But, when I try to add another NFS store (same NAS, other share) on that host, it also gives me the same error message.

All my essential VM's are now running on the first host, because the reside on the NFS store. I'm afraid that when I unmount the NFS datastore on that host, I am not able to remount it again, so I cannot run any VM anymore.

I need some help, because I'm quite new to vSphere. Any help appreciated.

Regards, Rini

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