Microsoft KB Archive/839231

= File copy operations to a DFS share perform slowly in Windows Server 2003 or in Windows XP =

Article ID: 839231

Article Last Modified on 12/1/2007

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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 (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Professional x64 Edition

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SYMPTOMS
When you copy files from Microsoft Windows Server 2003 or from Microsoft Windows XP to a Microsoft distributed file system (DFS) share or to a Samba DFS share, the file copy process is very slow. This problem occurs when you copy files to the DFS share, and you specify explicit credentials. If you copy files from the DFS share, you do not experience this problem.



CAUSE
This problem occurs if you explicitly specify the credentials to use when you connect to the DFS share. In this scenario, a new TCP session and an SMB session is opened four times for every file that is copied to the DFS share. A NetBIOS session may also open four times for every file that is copied to the DFS share.



Hotfix information

 * Microsoft Windows Server 2003
 * Microsoft Windows XP

Microsoft Windows Server 2003
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
There are no prerequisites.

Restart requirement
You must restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later) 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 tool in Control Panel.

Windows Server 2003, 32-bit editions

Date        Time   Version            Size    File name

24-Mar-2004 22:28  5.2.3790.144      106,496  Mup.sys

Windows Server 2003, 64-Bit Enterprise Edition

Date        Time   Version            Size    File name - 24-Mar-2004 22:19  5.2.3790.144      304,640  Mup.sys

Microsoft Windows XP
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
You must have Windows XP Service Pack 1 (SP1) installed to apply this hotfix. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

322389 How to obtain the latest Windows XP service pack

Restart requirement
You must restart your computer to apply the changes after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later) 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 tool in Control Panel.

Windows XP, 32-bit editions

Date        Time   Version            Size    File name

22-Mar-2004 3:33   5.1.2600.1366     104,704  Mup.sys

Windows XP, 64-Bit Edition

Date        Time   Version            Size    File name - 22-Mar-2004 3:12   5.1.2600.1366     354,176  Mup.sys



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section of this article.



MORE INFORMATION
For additional information, 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

Keywords: kbqfe kbhotfixserver kbbug kbfix kbwinserv2003presp1fix KB839231

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