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NetVault Plug-in for VMware 12.3 - User Guide

Introducing NetVault Backup Plug-in for VMware Installing the plug-in Configuring the plug-in Defining a backup strategy Using the image-level backup method Using the file-level backup method Restoring image-level backups Restoring file-level backups Troubleshooting

Restore job fails to add a virtual machine to the server inventory

Description

Restore job fails.

Symptom

A restore job fails with the following error:

Log message:

Failed to add VM to target server's inventory.

Log context:

Fault string is 'Invalid configuration for device '3'.

Solution

When this error occurs, enable trace and run the restore job again. When the job completes, open the file named vmw<nnn>_soaprecv.log, and check if it contains an XML message <WaitForUpdatesExResponse> with contents similar to the following:

<val xsi:type="LocalizedMethodFault">
<fault xsi:type="InvalidDeviceSpec">
<property>deviceChange[3].device.backing.fileName
</property>
<deviceIndex>3</deviceIndex>
</fault>
<localizedMessage>Invalid configuration for device &apos;3&apos;.</localizedMessage>
</val>

If so, it indicates that the backup contains an invalid configuration for a CD or DVD drive.

To correct this problem:

1
Open the file vmware.cfg in a text editor.
You can find this file in <NetVault Backup home>\config on Windows and <NetVault Backup home>/config on Linux.
2
Set the value for the following entry to True:
[Custom:ReconfigureVirtualCdromDevices]
Value=True
(The default value for this entry is False.)
3
Save the file.
4
Run the restore job again.
The job completes successfully. If a CD or DVD drive was set to “Host Device” or “Datastore ISO File” type during the original backup, it is reconfigured as “Client Device” type. A warning message in the logs provides a list of reconfigured devices. The log context includes their original configuration. To view the log context, click the More Info button.
5
After restoring the virtual machine, reset [Custom:ReconfigureVirtual CdromDevices] to False.

Disk type is always Thick Provision Eager Zeroed after restoring an image-level backup

Description

After restoring a virtual machine, virtual drives that are Thin Provisioned or Thick Provisioned Lazy Zeroed are automatically converted to Thick Provision Eager Zeroed.

Symptom

Regardless of the disk provisioning type, image-level backups without CBT enabled always back up the full disk. During restore, the .vmdk file is completely overwritten and VMware automatically converts a Thin Provision or Thick Provision Lazy Zeroed drive to Thick Provision Eager Zeroed.

Solution

To retain the original type for the drive during the restore process, make sure that the Enable Change Block Tracking for VM option is enabled for the backup job. For more information, see Defining a backup strategy.

Backup jobs of virtual machines protected by vSphere FT fail intermittently

Description

When backing up virtual machines that are protected using VMware vSphere Fault Tolerance (vSphere FT), the backup job fails.

Symptom

The job fails and reports the following: Cannot back up virtual machine while legacy fault tolerance is enabled.

Solution
 
* 
CAUTION: Before using the plug-in to back up virtual machines that are protected using vSphere FT, verify that your environment uses VMware ESXi 6.0 build number 4192238 or later.

Your virtual machine is protected by an earlier version of fault tolerance that does not support backup snapshots.

To back up and restore virtual machines that are using legacy fault tolerance, reconfigure the virtual machines to use a newer version of vSphere FT. Using the vSphere Web Client, turn off fault tolerance for the virtual machine, and then turn it on again. During the reconfiguration process, FT protection is not available for the virtual machine that you are reconfiguring.

RDM disks are restored to VMDK files

Description

RDM disks in virtual compatibility mode are restored to flat “.vmdk” files and not to the original RDM.

Solution

The alternative is to omit these disks during a restore.

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