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


View products that this article applies to.

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.

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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.

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Resolution

Hotfix information

A supported hotfix is 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 software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

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

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Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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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

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Keywords: KB840516, kbhotfixserver, kbqfe, kbwinserv2003presp1fix, kbfix, kbbug, kbautohotfix

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Article Info
Article ID : 840516
Revision : 10
Created on : 7/24/2007
Published on : 7/24/2007
Exists online : False
Views : 300