Quantum VSS Writer

If a VSS backup fails, make sure that the VMs being backed up are configured correctly. In addition, make sure of the following:

• The system to which you are backing up the VM must have enough free disk space. If the system does not have enough free disk space, the VSS backup will fail. For more information, see http://technet.microsoft.com/en-us/library/cc708051(v=ws.10).aspx.
• Each of the Windows system's VMs have the most up-to-date version of VMware Tools installed.
• VSS requires VMware Tools to be current. If a VM is configured for VSS but does not have a current version of VMware Tools, the following warnings appear on the vmPRO GUI:

  Warnings

  VMs Console

  • The VSS column displays a red YES for the VM.
  • An error message displays when you mouse over a VM with a red YES in the VSS column.

  Alerts Console

  An alert message displays for a VM that does not have a current version of VMware Tools. The message continues to display until you do one of the following:

  • Update VMware Tools for the VM, and rediscover the VM.
  • Disable VSS for the VM.

Use the following links to learn more about VSS:

• For more information how VMware can use VSS, see Designing Backup Solutions for VMware vSphere.
• For more information about AD recovery, see How to detect and recover from a USN rollback in Windows Server 2003, Windows Server 2008, and Windows 2008 R2 or Active Directory Backup and Restore.