Microsoft KB Archive/322757

= Backup Does Not Fully Restore Multi-Path Software =

Article ID: 322757

Article Last Modified on 3/1/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Datacenter Server

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This article was previously published under Q322757



SYMPTOMS
After you complete a full restoration of a Windows 2000-based computer, you may experience the following symptoms:
 * You may not be able to obtain access to the external storage.
 * Reinstallation of the HBA adapters may result in a stop error message.

Note that the removal of the multi-path software does not change this behavior.



CAUSE
Multi-path software must create a &quot;virtual bus&quot; to properly enumerate all the drives and devices that are attached to its associated HBA controllers. When a full restoration of a Windows 2000-based computer is completed, some registry entries are skipped. The multi-path software is dependent on the restoration of the information that is stored in the following registry key that is not restored:

HKEY_LOCAL_MACHINE\System\CCS\ENUM

After this occurs, the multi-path software tries to enumerate devices on the virtual bus, but the virtual bus cannot be created.



RESOLUTION
To work around this behavior:
 * 1) Complete the clean installation of Windows 2000.
 * 2) Before you complete the full restoration of the backup, install the correct drivers for the HBA controllers, and then install and configure the multi-path software.

This procedure ensures that the multi-path software can connect to the devices that are attached to its virtual bus.



STATUS
This behavior is by design.



MORE INFORMATION
233427 Files and Folders Not Backed Up Using the Ntbackup.exe Tool

Additional query words: ntbackup powerpath restore backup keysnottorestore

Keywords: kbenv kberrmsg kbprb kbui KB322757

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