The backup data is corrupted when you use the Windows Backup utility to back up some SQL Server databases or the AD LDS instance data in Windows 7

Symptoms

When you use the Windows Backup utility on a computer that is running Windows 7, the following two issues may occur.

Cause

These issues occurs because the Windows Backup utility relies on a hard-coded list of VSS writers. However, the VSS writers for SQL Server and for AD LDS are not used to create the backups. Therefore, the backup data is corrupted.

Note These issues may occur to some other applications that do not have the corresponding in-box VSS writers when you use the Windows Backup utility to back up data.

Resolution

After you apply this hotfix, you can create a multi-string value that has the EnabledWriters name to specify additional VSS writers for the backup in the following path:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SPP

Notes

• The registry value type is REG_MULTI_SZ, and the registry value is a list of writer IDs that are GUID.

• You can run the following command at an elevated command prompt to obtain a list of subscribed VSS writers on a computer that is running Windows 7:
  
  

  vssadmin list writersFor example, you run this command and obtain the following writer information. Then, you set the EnabledWriters registry value to the the Writer ID value and use the Windows Backup utility to back up the configuration data for Internet Information Services (IIS).
  
  

  Writer name: 'IIS Config Writer'
  
  Writer Id: {2a40fd15-dfca-4aa8-a654-1f8c654603f6}
  
  Writer Instance Id: {4f3e7efb-bfbe-4d81-8307-b0e306159874}
  
  State: [1] Stable
  
  Last error: No error
  

You can also create a DWORD value that has the BackupType name for the default backup type in the following path:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SPP

Note The registry value type is REG_DWORD. If the registry value is set to 0, the BackupType DWORD value is treated as the VSS_FULL backup type. Additionally, you use the VSS to perform a full backup, and the history of each file that is backed up is updated. If the registry value is set to a nonzero value, the BackupType DWORD value is treated as the VSS_COPY backup type. Additionally, the history of each file that is backed up is not updated.

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

For more information about how to use VSS, visit the following Microsoft Developer Network (MSDN) website:

General information about how to use VSSFor more information about AD LDS for Windows7, visit the following Microsoft website:

General information about AD LDS for Windows7For more information about the Wbadmin command, visit the following Microsoft website:

General information about the "Wbadmin" commandFor more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates