DOCUMENT:Q316427  08-MAY-2002  [winnt]
TITLE   :Computer Hangs During Startup If DMA Mode Is Set for IDE Devices
PRODUCT :Microsoft Windows NT
PROD/VER::4.0,4.0 SP6a
OPER/SYS:
KEYWORDS:kbWinNT400nospFix

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The information in this article applies to:

 - Microsoft Windows NT Server versions 4.0, 4.0 SP6a 
 - Microsoft Windows NT Server, Enterprise Edition versions 4.0, 4.0 SP6a 
 - Microsoft Windows NT Workstation versions 4.0, 4.0 SP6a 
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SYMPTOMS
========

Your computer may stop responding (hang) while the boot screen is displayed if
DMA mode is set for IDE devices in an IBM ThinkPad docking station.

CAUSE
=====

This problem is caused by the CMD PCI-648 IDE controller that is built into the
docking station. This device raises an interrupt but does not set its status
accordingly. After you install this hotfix, the interrupt is ignored.


RESOLUTION
==========

A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the
fix. For a complete list of Microsoft Product Support Services phone numbers and
information on support costs, please go to the following address on the World
Wide Web:

   http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are normally incurred for support calls may
be canceled, if a Microsoft Support Professional determines that a specific
update will resolve your problem. Normal support costs will apply to additional
support questions and issues that do not qualify for the specific update in
question.

The English version of this fix should have the following file attributes or
later:

   Date         Time   Version        Size    File name
   ----------------------------------------------------
   19-Jan-2002  00:37  4.0.1381.7123  27,728  Atapi.sys



STATUS
======

Microsoft has confirmed this to be a problem in the Microsoft products that are
listed at the beginning of this article.

Additional query words:

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Keywords          : kbWinNT400nospFix 
Component         : Drivers,Disk
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400sp6 kbWinNTS400search kbWinNTS400 kbWinNTSEnt400SP6a kbWinNTW400SP6a
Version           : :4.0,4.0 SP6a
Hardware          : x86
Issue type        : kbbug
Solution Type     : kbfix

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