Microsoft KB Archive/840516

= Slow performance when Windows Server 2003 writes data to a fiber-channel-connected file share =

Article ID: 840516

Article Last Modified on 7/24/2007

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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

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SYMPTOMS
When you use a Microsoft Windows Server 2003-based computer to write data to a Windows Server 2003 file share that is connected over a fiber channel, the I/O transfer rate may be slower than expected.



CAUSE
This problem may occur if both of the following conditions are true:
 * Data is written in sequential block writes of 64 kilobytes (KB) to a file share on a Windows Server 2003-based computer.
 * The file share is located on a drive that is connected over a fiber channel.



Hotfix information
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
No prerequisites are required.

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 --  20-Apr-2004  23:35  5.2.3790.164      355,328  Srv.sys 12-Apr-2004 22:56                        271  Branches.inf 21-Apr-2004 03:56                      9,766  Kb840516.cat 21-Apr-2004 02:42                        354  Updatebr.inf 21-Apr-2004 02:43                      5,684  Update_rtmqfe.inf

Windows Server 2003, 64-Bit Edition
   Date         Time   Version            Size    File name --  20-Apr-2004  23:35  5.2.3790.164      991,744  Srv.sys 12-Apr-2004 22:56                        271  Branches.inf 21-Apr-2004 03:56                      9,766  Kb840516.cat 21-Apr-2004 02:45                        354  Updatebr.inf 21-Apr-2004 02:45                      5,704  Update_rtmqfe.inf



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



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: kbbug kbfix kbwinserv2003presp1fix kbqfe kbhotfixserver KB840516

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