DOCUMENT:Q164378  08-AUG-2001  [winnt]
TITLE   :WinNT 4.0 SP2 or SP3 Atapi Does Not Support Ultra DMA Devices
PRODUCT :Microsoft Windows NT
PROD/VER:winnt:4.0
OPER/SYS:
KEYWORDS:kbWinNT400sp4fix

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The information in this article applies to:

 - Microsoft Windows NT Workstation version 4.0 
 - Microsoft Windows NT Server version 4.0 
 - Microsoft Windows NT Server version 4.0, Terminal Server Edition 
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SYMPTOMS
========

ATAPI devices adhering to the Ultra-DMA specification are not recognized as
Ultra-DMA capable under Windows NT, and DMA support is not enabled.

CAUSE
=====

The Microsoft Atapi.sys device driver needs to check new ultra DMA flags in
Identify data, and enable DMA support on ultra DMA devices is required.

RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or
Windows NT Server 4.0, Terminal Server Edition. For additional information,
please see the following article in the Microsoft Knowledge Base:

   Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack


-or-

To resolve this problem, install the updated Atapi.sys driver. For this
functionality to be available with the new Atapi.sys driver, the following post
SP3 fix is also required. For your convenience, the English version of this
post-SP3 hotfix has been posted to the following Internet location. However,
Microsoft recommends that you install Windows NT 4.0 Service Pack 4 to correct
this problem.

   ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa/nt40/hotfixes-postSP3/ide-fix/


STATUS
======

Microsoft has confirmed this to be a problem in Windows NT 4.0 and Windows NT
Server 4.0, Terminal Server Edition. This problem was first corrected in Windows
NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition
Service Pack 4.



Additional query words:

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Keywords          : kbWinNT400sp4fix 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbNTTermServ400 kbNTTermServSearch
Version           : winnt:4.0
Issue type        : kbbug
Solution Type     : kbfix

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Copyright Microsoft Corporation 2001.