DOCUMENT:Q197366  20-MAY-2002  [winnt]
TITLE   :Data Corruption Recovering from Failed Mirror Set
PRODUCT :Microsoft Windows NT
PROD/VER:WinNT:4.0
OPER/SYS:
KEYWORDS:

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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 
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SYMPTOMS
========

When a disk fails on a system with multiple mirror sets, the status of mirror
sets in Disk Administrator displays incorrectly when the computer is restarted
and may cause data corruption. Running Chkdsk.exe on a mirrored drive reports
errors because of corruption.


CAUSE
=====

This problem occurs because of a thread synchronization problem in Windows NT.

RESOLUTION
==========

A supported fix that corrects this problem is now available from Microsoft, but
has not been fully regression tested and should be applied only to systems
experiencing this specific problem. If you are not severely affected by this
specific problem, Microsoft recommends that you wait for the next Windows NT
service pack that contains this fix.

To resolve this problem immediately, 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

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

   Date      Time                 Size    File Name     Platform
   -------------------------------------------------------------
   12/07/98  06:49p              33,968   Ftdisk.sys    (x86)
   12/07/98  06:48p              56,752   Ftdisk.sys    (Alpha)


STATUS
======

Microsoft has confirmed this to be a problem in Windows NT version 4.0.

Additional query words: 4.00
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Keywords          :  
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400
Version           : WinNT:4.0
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbfix

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

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