Edit

Diskshadow error when you try to create a VSS snapshot

  • Article

This article describes an issue that triggers an error message when you try to create a Volume Shadow Services (VSS) diskshadow snapshot.

Applies to:   Windows Server 2012 R2
Original KB number:   3025158

Symptoms

When you open an administrator command prompt and create a VSS diskshadow snapshot in Windows Server 2012 R2, the output may contain an error:

Commands:

DISKSHADOW> add volume c:  
DISKSHADOW> create

Output:

COM call "lvssObject4->GetRootAndLogicalPrefixPaths" failed.

Cause

This error occurs when the backup operation reaches a point, where it tries to process the boot configuration data (BCD) store data. BCD store is in the system partition. But because this partition isn't in the list of mounted devices, the error is triggered.

Resolution

This particular COM call failure message is harmless. Despite the message, the shadowcopy backup is completed successfully. So, no resolution is required.

More information

Microsoft is aware of this issue and will continue to investigate for future updates.