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NetVault Plug-in for VMware 12.0 - 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

Linux Hybrid version of the plug-in does not run on 64-bit OS

Description

The Linux Hybrid version of the plug-in does not run on pure 64‑bit operating system.

Symptom

The plug-in fails to open and displays the message “No Error.”

Solution

Pure 64-bit operating systems do not install some common 32-bit libraries the plug-in requires.

To correct this problem, do the following:

1
Start a terminal session, and go to /usr/netvault/bin.
2
To list the missing libraries, run the following command:
ldd nvvmware | egrep -i “missing|not found”
3
Use the applicable package manager to install the missing 32-bit libraries.
 
* 
NOTE: Some libraries are dynamically loaded from the path $NV_HOME/dynlib/vddk/. If these libraries are listed as missing, no action is required.

Crash occurs during a backup

Description

During a backup, the plug-in reports an error and stops responding.

Symptom

The plug-in fails with the following error in the NetVault Backup logs:

Backing up data of VM disk [XXXXXXX]xxx/xxxxxxxxx. vmdk' to media : “Job manager lost message channel unexpectedly.”

The trace logs include the following message:

Cannot open library: libexpat.so.0: cannot open shared object file in vixDiskLib-16642.log.

Solution

To correct this problem, navigate to the /usr/lib directory, and create the following symbolic link:

ln -s /lib/libexpat.so.1.5.2 libexpat.so.0

CBT-based image-level backup fails

Description

An image-level backup for which CBT has been enabled reports an error and fails.

Symptom

The job fails with the following error in the NetVault Backup logs:

Failed to get changed disk areas.

Solution

This issue occurs when a snapshot exists on a virtual machine when CBT is enabled. For snapshots that exist before enabling CBT, the changeId parameter is not set. So, when the QueryChangedDiskAreas API is invoked, it returns an error. For more information, see http://kb.vmware.com/kb/1033816.

To correct this problem, do either of the following:

•
Ensure that no snapshots exist on the virtual machine before selecting the Enable Change Block Tracking for VM check box.
— or —
•
Use the Reset Change Block Tracking option. This option reconfigures CBT on a virtual machine and allows you to run CBT-enabled backup that failed previously. For more information about this option, see Resetting CBT on a virtual machine.

SAN transport reports errors when multiple backups access the same datastore

Description

A Linux-based client may fail to read the contents of a virtual drive using the SAN transport mode if multiple backup processes are accessing the same datastore.

Symptom

During a backup using the SAN transport mode, the following errors are reported:

San transport error: I/O Operation failed.

Error: One of the parameters supplied is invalid.

Solution

These errors are caused by a fault in the Linux kernel when handling SCSI reservation conflicts.

The errors are encountered on the following systems:

•
Red Hat Enterprise Linux (RHEL) 6.1 and earlier versions
•
SUSE Linux Enterprise Server (SLES) 11.1 and earlier versions

To correct this issue, upgrade to kernel version 2.6.32-220 or later on RHEL and kernel version 3.0.13 or later on SLES.

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