Microsoft KB Archive/813861

= Windows XP Service Pack 1 Incorrectly Identifies the VIA VT82C686B Chipset as Supporting Ultra DMA Mode 6 =

Article ID: 813861

Article Last Modified on 8/29/2007

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional

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SYMPTOMS
When you install Windows XP Service Pack 1 (SP1) on a computer where both of the following conditions are true
 * The computer uses the VIA Technologies VT82C686B chipset and an Integrated Drive Electronics (IDE) hard disk.
 * The IDE supports the Ultra DMA Mode 6 transfer mode.

the current transfer mode is incorrectly listed as Ultra DMA Mode 6.



CAUSE
This issue occurs because the version of Viaide.sys that is included with Windows XP SP1 incorrectly identifies the VIA VT82C686B chipset as supporting Ultra DMA Mode 6 instead of correctly stating that it supports up to Ultra DMA Mode 5.



Service pack information
To resolve this problem, obtain the latest service pack for Microsoft Windows XP. 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

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

The Global version of this fix 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.   Date         Time   Version      Size    File name --  24-FEB-2003   18:00  1.00.01.01   4,864  Viaide.sys



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Microsoft Windows XP Service Pack 2.



MORE INFORMATION
The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

Keywords: kbhotfixserver kbqfe kbqfe kbwinxpsp2fix kbwinxppresp2fix kbfix kbbug KB813861

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