Description: Shadow copy 6 time-out (20000 ms). Shadow copies are lost during backup and during times when there are high levels of input/output. Another related symptom is that shadow copies of shared network folders may have been deleted. When this problem occurs, the following event error is logged: Event Type: Error. Event Source: VolSnap.

In this scenario, the backup task fails, and you may receive the following error message that states the Volume Shadow Copy Service (VSS) failed because of a time-out: FAILED_AT_FREEZE (0x800423f2 - VSS_E_WRITERERROR_TIMEOUT) Cause.

Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VSS] "DependOnService"=hex(7):52,00,50,00,43,00,53,00,53,00,00,00,00,00 ...

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In this scenario, the backup fails, and you receive the following error message: 0x800423f3 - VSS_E_WRITERERROR_RETRYABLE. For example, this issue may occur when you perform a System State backup operation on a Microsoft System Center Data Protection Manager (DPM) server. Note A DPM server usually has lots of volumes.

Symptoms. Consider the following scenario: You run a Windows Server 2003-based virtual machine on a Windows Server 2008 Hyper-V-based computer. The virtual machine has files that reside on the array disk volume. You try to back up the virtual machine by using Windows Server Backup.

This issue occurs because the Volume Shadow Copy Service (VSS) Automated System Recovery (ASR) writer performs a prefix comparison operation when the ASR writer enumerates the volumes. This behavior causes the ASR writer to incorrectly mark these noncritical volumes as critical volumes. Resolution. Hotfix information.

Symptoms. Consider the following scenario: You create a transportable VSS snapshot on a Windows Server 2008-based computer that has Active Directory-related roles installed. The VSS_VOLSNAP_ATTR_AUTORECOVER flag is not enabled. In this scenario, VSS snapshot creation may fail.

This issue occurs when the restore uses the ResyncLuns Volume Shadow Copy Service (VSS) API. Cause. This issue occurs because the VSS ResyncLuns operation is rejected by the VSS software provider. Resolution. To fix this issue, we've released a hotfix for Windows 8.1 or Windows Server 2012 R2. Hotfix information.