DOCUMENT:Q171295  09-AUG-2001  [winnt]
TITLE   :Fault Tolerant Systems May Encounter Problems with WinNT SP3
PRODUCT :Microsoft Windows NT
PROD/VER:WinNT:4.0
OPER/SYS:
KEYWORDS:kb3rdparty kbfile kbWinNT400sp4fix

======================================================================
-------------------------------------------------------------------------------
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 
-------------------------------------------------------------------------------


SYMPTOMS
========

With the FirstWatch program, transition failures have been observed that require
the use of CLARiiON's Trespass utility. For example, the system may start in
Online Primary mode, but any attempt to change into Dual mode fails. The Ha.log
file contains errors that occurred while using Trespass. You may also notice
that the Scsi.exe, Clarscsi.exe, and Diskcfg.exe programs do not display LUNs
(logical unit numbers), which Trespass needs to access.

The CLARiiON Agent Service may report problems in the event log. The following
two events messages have been logged:

   ERROR: Opening Device: , 1:0:0.

   Is the device configured correctly?

After these events, attempting to select the host in ArrayGuide reports the
following error:

   Could not connect to the chassis, check device name in fw31a's agent
   configuration file.

ATF failures have also been observed.

CAUSE
=====

This problem is caused by changes in the way Windows NT handles the SCSI LUN
enumeration in Service Pack 3.

RESOLUTION
==========

Perform the following steps to resolve this problem:

1. 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


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/scsi-fix

NOTE: Service Pack 3 must be applied to Windows NT 4.0 prior to applying this
fix.

2. WARNING: Using Registry Editor incorrectly can cause serious, system- wide
   problems that may require you to reinstall Windows NT to correct them.
   Microsoft cannot guarantee that any problems resulting from the use of
   Registry Editor can be solved. Use this tool at your own risk.

   Install the new Scsiport.sys and go to the following registry key:

      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Disk\ 

3. Add the following new value to the above registry path to activate the new
   code:

      Value Name = ScanDisconnectedDevices
      Data Type = REG_DWORD
      Data = 1


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.



MORE INFORMATION
================

The third-party products discussed here are manufactured by vendors independent
of Microsoft; we make no warranty, implied or otherwise, regarding these
products' performance or reliability.

Additional query words: 4.00 sp3 NG
======================================================================
Keywords          : kb3rdparty kbfile kbWinNT400sp4fix 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbNTTermServ400 kbNTTermServSearch
Version           : WinNT:4.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.  MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.  SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 2001.