The following is a list of issues, including those attributed to third-party products, known to exist at the time of release.
Table 3. Known issues If you remove a VMware Server, and re-add the server with the same name but a different hostname (or IP address), the plug-in does not allow you to open the server node without first terminating the nvvmware.exe process from the Windows Task Manager. The “.nvram” and “.vmx” files must reside in the same directory. Otherwise, you must manually edit the file path for the “.nvram” file after restoring the data. Raw Disk Mapping (RDM) disks in virtual compatibility mode are restored to flat “.vmdk” files and not to the original RDM. The alternative is to omit these disks during a restore. If you select the Auto setting as the primary transport mode, during the backup of a virtual machine that has disks on SAN storage as well as storage accessible only through the network, the NetVault Backup logs may report the transport mode incorrectly as “san” when the disk is opened in a network-based mode (nbd or nbdssl). VDDK uses a kernel-mode driver for mounting a virtual machine during file-level backup and browse operations. The Plug‑in for VMware automatically starts a service for the driver when you install the plug-in, but it does not delete the service when you remove the plug-in. Moreover, the plug-in does not check if the service is running when you perform an upgrade or a reinstallation. The configuration setting [Custom:MountOperationTimeoutSecs], which is stored in the vmware.cfg file, determines how long the plug-in process waits for the mount daemon to respond to a request. The default value is set to 600 seconds during a fresh install and 300 seconds during an upgrade. If the mount daemon is unable to complete a request within the specified interval, the virtual machine is left in a mounted state.If you have a large number of backups running simultaneously or your server is running under heavy load, modify the value for the [Custom:MountOperationTimeoutSecs] setting to avoid running into this situation. When you use the NetVault Backup Plug-in for Consolidation, the image-level backups of virtual machines are displayed on the Create Selection Set page, but you cannot consolidate these savesets. Workaround: The workaround is to convert the template to a virtual machine. A virtual machine cannot be restored if the name of the target resource pool includes characters from the double-byte character set.Workaround: Restore the virtual machine to the root resource pool by specifying “/” in the Allocate to Different Resource Pool box. After the restore completes, manually move the virtual machine to the desired resource pool using the vSphere Client. To avoid file fragmentation, the Plug‑in for VMware pre-allocates disk space before restoring files to disk. On Linux-based systems, files that are larger than 50MB in size are not pre‑allocated full disk space. Such files are handled like sparse files and allocated disk space as needed during restore. If the disk does not have sufficient space to fully restore files that are larger than 50MB in size, the job fails when the disk runs out of space. When a standalone VMware ESX or VMware® ESXi™ Server is added to the plug-in, a backup selection at a Resource Pool level does not back up any virtual machines in the resource pool. When restoring the virtual machine disk and configuration files from an image-level backup, if you select an Incremental Backup with the Restore Files from Backup method, the plug-in only restores the Full Backup for the selected backup sequence. If the virtual machine name includes non-ASCII characters, the Restore Files from Backup method restores an invalid “.vmx” file, which cannot be used to create a virtual machine using the VMware Converter utility. For such virtual machines, you must manually create a new virtual machine using the restored “.vmdk” files.
• Therefore, before removing the plug-in, you must take a copy of the libeay32.dll and ssleay32.dll files from the <NetVault Home>\bin directory, and restore them to the same directory after removing the plug-in. Otherwise, the NetVault Backup Service does not start. When restoring an Incremental or a Differential Backup using SAN mode, the plug-in, in some configurations, may not automatically fall back to NBD mode.Workaround: Set the transport mode manually to NBD. When using the NBD transport mode, a large Read Block Size may prevent multiple backup processes from running at the same time.Workaround: Use SAN or SCSI Hot-Add transport modes or decrease Read Block Size. If the Diagnose Virtual Machine method is unable to return any result within the timeout interval (five minutes), the Web Service process displays the following message: “Error: The remote machine: <Name of the NetVault Backup Server> is unavailable”You can close this dialog box to continue the current operation. In the background, the Diagnose Virtual Machine method runs the cleanup process to remove any snapshot that it has created.
Table 4. Third-party known issues When backing up a powered on virtual machine through a VMware® vCenter™ Server, the plug-in may fail to back up the “.nvram”, “.vmx” and “.log” files. For more information, see . When a snapshot is created on a virtual machine that uses thin-provisioned disks, VMware vSphere® (the client and the underlying disk library) identifies the disk as thick. For more information, see . To prevent the migration of a virtual machine while its disks are being accessed for a backup or restore, the plug-in uses VDDK APIs to lock and unlock a virtual machine. This functionality is disabled by default. To enable it, see the user's guide for the plug-in. Currently, the locking functionality has the following known issues:
• Unlocking is known to fail occasionally. This issue has been documented in the VDDK 5 release notes. For details, review the “EndAccess sometimes does not reenable migration after PrepareForAccess” section in the VDDK 5.0 Release Notes.
• When you restore a virtual machine that was previously renamed on a vCenter Server, the plug-in creates both the old and new virtual machines on the server.Workaround: After restoring the backup, rename the virtual machine, and then, move the virtual machine to another datastore. This merges the two folders created during the restore into a single folder. If the size of a virtual disk is 2TB or a multiple of 2TB, the disk is always opened in NBD mode instead of SAN. This issue only affects virtual machines that use hardware version 10 (vmx-10).Workaround: Increase or decrease the size of the virtual disk (for example, to 2.01 TB, 3.99 TB). When a virtual machine is cloned outside the vCenter Server, it may have the same UUID as the original virtual machine. If this cloned virtual machine is selected for a backup, the plug-in may back up the original virtual machine instead of the clone. To correct this issue, you must change the UUID of the cloned virtual machine. For more information about changing the UUID of a virtual machine, see .
Before installing the Plug‑in for VMware 10.5, ensure that your system meets the following requirements.
Table 5. System requirements For complete supported-platform information, see the NetVault Backup Plug-in Compatibility Guide available at .
• Edit the programs.cfg file after upgrading to NetVault Backup 11.0: After installing Plug‑in for VMware 10.5, if you upgrade to NetVault Backup 11.0, you must edit the programs.cfg file to disable creation of detached processes.You must also complete this configuration to use the previous versions of the plug-in (Plug‑in for VMware 10.0.5 and earlier) with NetVault Backup 11.0.
• Open the programs.cfg file in a text editor. You can find this file in the config directory under the NetVault Backup installation directory.
• Cannot browse mounted virtual machines after upgrading NetVault Backup: After installing the plug‑in, if you upgrade the NetVault Backup software, you must re-install the plug-in on that machine. Otherwise, you will be unable to open the Drives node of a mounted virtual machine for any new file‑level backups.
• Restart the NetVault Backup Service if “nvvmwmount.exe” was running during upgrade: If the mount process “nvvmwmount.exe” was running during an upgrade from 2.x, restart the NetVault Backup Service on the client.
• Select the correct installation package on Linux: Starting with 10.0, NetVault Backup offers separate client-only and server-only installation packages for Linux-based systems. Both the server and the client packages are available in hybrid and pure 64-bit versions:
• Hybrid server and client packages: The hybrid packages (LinuxX86HybridServer and LinuxX86Hybrid) are intended for Linux users who do not have a pure 64-bit-only requirement.These packages let you upgrade from pure 32-bit as well as hybrid installations of NetVault Backup. The hybrid packages retain binary compatibility with all previous versions of 32-bit and 64-bit plug-ins. These packages also work on 32-bit systems that do not have 64-bit capability.
• Pure 64-bit server and client packages: The pure 64-bit packages (LinuxX86Pure64Server and LinuxX86Pure64) packages are intended for pure 64-bit Linux distributions. If you have a specific reason that you cannot use any 32-bit components (for example, you are using a Linux distribution that does not run 32-bit code), use these packages.The pure 64-bit packages cannot be used to upgrade existing pure 32-bit or hybrid NetVault Backup installations. You must remove the existing pure 32-bit or hybrid version and install the pure 64-bit version separately. To reduce confusion, warning messages have been added to both the upgrade and installation packages to ensure that you understand that they are not compatible.Depending on your OS type, verify that you select the correct installation package to install the NetVault Backup Server or Client software:
• LinuxX86HybridServer: Use this package to install or upgrade NetVault Backup Server on 32- or 64-bit Linux systems.
• LinuxX86Hybrid: Use this package to install or upgrade NetVault Backup Client on 32- or 64-bit Linux systems.
• LinuxX86Pure64Server: Use this package to install or upgrade NetVault Backup Server on pure 64-bit Linux systems.
• LinuxX86Pure64: Use this package to install or upgrade NetVault Backup Client on pure 64-bit Linux systems.
Table 6. Pure64 builds
NOTE: X = Compatible