Restoring NTBackup Sets Generated by Faulty SP4 Tandqic.sys (240087)

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

SYMPTOMS

When you use the the NTBackup program in conjunction with the Tandqic.sys driver provided in Windows NT 4 Service Pack 4 (SP4) to restore data from a tape backup on a Tandberg SLR5 tape drive, you may not be able to restore the data. You may not be able to retrieve the backup catalog or restore single files. Even though you can successfully backup data to a tape in the SLR5 drive, you may find that you receive confirmation of a successful restore operation when in fact, no data is restored.

RESOLUTION

Windows NT Server or Workstation 4.0

To resolve this problem, obtain the latest service pack for Windows NT 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To resolve this issue, you can use the Regset.exe utility, located in the Windows NT 4.0 Service Pack 6 \Support\Utils\i386 folder, to automatically adjust the pertinent registry entries so that data can be restored from a tape backup that was created with a computer running Windows NT 4.0 Service Pack 4.

You can also manually modify the registry settings that control the NTBackup program when using the Tandqic.sys driver. To do this:

Start Registry Editor (Regedt32.exe).
Locate the "Use fast file restore" value under the following key in the registry:
HKEY_LOCAL_CURRENT_USER\Software\Microsoft\Ntbackup\Backup Engine
On the Edit menu, click String, type 0, and then click OK.
Locate the "Use Tape Catalogs" value under the following key in the registry:
HKEY_LOCAL_CURRENT_USER\Software\Microsoft\Ntbackup\User Interface
On the Edit menu, click String, type 0, and then click OK.
Quit Registry Editor.

Windows NT Server 4.0, Terminal Server Edition

To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base: