Volume Shadow Copy Error

Example:

Your backup report contains the following:

Error returned while creating the volume shadow copy:800423f2 Reverting to non-shadow copy backup mode. Backup of "C: ".

Explanation:

There is a bug in Microsoft Windows that causes this problem.

Causes and Resolution:

1. Please visit this website to install a hotfix, if the article applies:
   http://support.microsoft.com/?id=826936

   Our thanks goes to S. Morris from Australia for this information.

2. Or you can visit this website to install a hotfix:
   http://support.microsoft.com/kb/891957.

3. An issue with Acronis TrueImage? 9 can cause the VSS operation to fail with NTBackup. Details here: http://www.wilderssecurity.com/showthread.php?p=727926

4. Try re-registering the VSC & providers. To do this, conduct the following (see below for an alternate method to achieve this):
   regsvr32 ole32.dll

   regsvr32 vss_ps.dll

   vssvc /Register

   regsvr32 /i swprv.dll

   regsvr32 /i eventcls.dll

   regsvr32 es.dll

   regsvr32 stdprov.dll

   regsvr32 vssui.dll

   regsvr32 msxml.dll

   regsvr32 msxml2.dll

   regsvr32 msxml3.dll

   regsvr32 msxml4.dll

5. Another one of our customers, John Mitchell, provided us with this useful feedback:
   According to Microsoft Premier Support this is the correct procedure to follow when re-registering the Volume Shadow Copy service DLL's.

   CD to Windows\System32

   Net stop vss

   Net stop swprv

   regsvr32 ole32.dll

   regsvr32 vss_ps.dll

   Vssvc /Register

   regsvr32 /i swprv.dll

   regsvr32 /i eventcls.dll

   regsvr32 es.dll

   regsvr32 stdprov.dll

   regsvr32 vssui.dll

   regsvr32 msxml.dll

   regsvr32 msxml3.dll

   regsvr32 msxml4.dll

   Reboot your server.

   After reboot, open a command prompt and run:

   vssadmin list writers

   Ensure that all your writers are displayed w/o errors.

6. There is also additional information about the Microsoft VSS update package here:
   http://support.microsoft.com/?id=833167

Note:-

• Please note that the service pack 2 for Windows Server 2003 has updated many of the modules specified in the Microsoft Knowledgebase articles referenced in step-1 and step-2

• Please navigate to the following directory \windows\system32\ before proceeding to perform the VSS dll re-registration as failure to do so can cause issues.

Thanks goes to John Gray (GAVCA) for this feedback.