Microsoft KB Archive/903234

= An update is available to optimize the way that the Shadow Copy Client accesses shadow copies in Windows Server 2003 and in Windows XP =

Article ID: 903234

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003, 64-Bit Enterprise Edition
 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Professional for Itanium-based systems
 * Microsoft Windows XP Professional x64 Edition

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SUMMARY
''An update is available to add support for the Microsoft Data Protection Manager End User Recovery feature to the Shadow Copy Client. The Shadow Copy Client may also be referred to as the &quot;Timewarp&quot; client.

After you install this update, the updated Shadow Copy Client can recover data from a Data Protection Manager server if a Data Protection Manager server is available.''



INTRODUCTION
This article describes an update that is available for the Shadow Copy Client. This update is available for Microsoft Windows Server 2003 and for Microsoft Windows XP. This update performs both the following actions:  This update adds support for the Microsoft Data Protection Manager End User Recovery feature to the Shadow Copy Client. Therefore, the Shadow Copy Client can recover files from a Data Protection Manager server. This update optimizes the way that the Shadow Copy Client accesses shadow copies in Windows Server 2003 and in Windows XP.

Note If you install KB 903234 on a computer that is running Citrix Presentation Server or Citrix MetaFrame, you may not be able to copy files when you use Windows Explorer. These products are made by Citrix Systems, Inc. A supported KB 903234 is now available from Microsoft. However, if you have products that are made by Citrix Systems, Inc., we recommend that you install the KB 925066 hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

925066 In a domain environment, Windows Explorer may stop responding on a client computer that is running Windows XP or Windows Server 2003, and CPU usage is very high on the primary domain controller



For more information about the latest service pack for Windows Server 2003, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003



MORE INFORMATION
Shadow Copies of Shared Folders is a Windows Server 2003 feature that takes point-in-time backups of user's data files. These point-in-time backups are also known as &quot;snapshots.&quot; If a user unintentionally deletes or damages a file, that user might be able to recover a recent version of the file from a Shadow Copies of Shared Folders snapshot. Although Shadow Copies of Shared Folders is a server feature, this feature also requires support on the client computer. This client-side support is also referred to as the Shadow Copy Client.

Typically, Shadow Copies of Shared Folders runs on a local file server. In this situation, if a user unintentionally deletes a file, and if a good snapshot is not available on the local file server, that user could not restore the deleted file.

Data Protection Manager is a data protection solution that extends Shadow Copies of Shared Folders. Data Protection Manager is a stand-alone disk backup program that contains the End-User Recovery feature. You can use the End-User Recovery feature to recover files from a Data Protection Manager server. You can do this without having to obtain assistance from an administrator. In this situation, if you try to recover a shared file or folder that is located on a Data Protection Manager-protected server, the following behavior occurs:
 * If local shadow copies or &quot;snapshots&quot; are available on the local file server, you are prompted to recover the file or folder from the local shadow copy.
 * If the following conditions are true, you are redirected to shadow copies of the file or folder that exist on the Data Protection Manager server:
 * No local shadow copies of that file or folder exist.
 * The update that is described in this article is installed on the computer.

Note By default, the End User Recovery feature of the Shadow Copy Client directs the user to recover files from the local file server.

The update that is described in this article is designed to optimize the way that the Shadow Copy Client accesses snapshots. Without this update installed, the Shadow Copy Client opens every existing shadow copy for a particular volume. After you install this update, the Shadow Copy Client searches for unique versions of a shadow copy before the Shadow Copy Client opens the shadow copy. This new behavior significantly reduces the load that the Shadow Copy Client puts on the server.

Additionally, this software update replaces the functionality that is included in the hotfix that is described in the following Microsoft Knowledge Base article:

895536 How to use the End User Recovery functionality of Data Protection Manager in Windows XP

Microsoft Knowledge Base article 895536 describes an update to extend the Shadow Copy Client functionality. This software update changes the Shadow Copy Client. For example, if the Shadow Copy Client cannot locate the required shadow copy on the local server, the Shadow Copy Client looks for a Data Protection Manager server from which to obtain the shadow copy.

Important The change in functionality that is described in Microsoft Knowledge Base article 895536 is also included in the software update that is described in this article. Therefore, if you install the software update that is mentioned in this article, you do not have to install the update that is described in Microsoft Knowledge Base article 895536.

Note To use the End-User Recovery functionality of Data Protection Manager, you must do both the following:
 * You must update the Shadow Copy Client on the client computer by installing the software update that is described in this article.
 * You must enable the End User Recovery feature on the Data Protection Manager server.

Windows Server 2003
For Windows Server 2003, install the KB 925066 hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

925066 In a domain environment, Windows Explorer may stop responding on a client computer that is running Windows XP or Windows Server 2003, and CPU usage is very high on the primary domain controller

Download information
The following files are available for download from the Microsoft Download Center:

Windows XP, x86-based versions

Download the WindowsXP-KB903234-x86-enu.exe package now.

Windows XP, x64-based versions

Download the WindowsXP-KB903234-x64-enu.exe package now.

Release Date: July 25, 2005

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Prerequisites
No prerequisites are required to install this update.

Restart requirement
You do not have to restart the computer after you apply this update.

Update replacement information
This update replaces the update that is described in Microsoft Knowledge Base article 895536.

File information
The English version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows XP, x86-based versions   Date         Time   Version            Size    File name --  19-Jul-2005  02:47  6.0.3800.2721      55,808  Twext.dll Windows XP, x64-based versions   Date         Time   Version            Size    File name --  16-Jul-2005  03:05  6.0.3790.2489     112,640  Twext.dll 16-Jul-2005 03:05  6.0.3790.2489      82,944  Wtwext.dll

Additional query words: dpm eur vss

Keywords: kbwinserv2003presp2fix atdownload kbbug kbfix kbqfe kbpubtypekc KB903234

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