DOCUMENT:Q247858  08-MAY-2002  [winnt]
TITLE   :CRC Error Message on FAT Media Causes Kernel Stack Overflow
PRODUCT :Microsoft Windows NT
PROD/VER::4.0
OPER/SYS:
KEYWORDS:kbWinNT400PreSP7Fix

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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, Enterprise Edition version 4.0 
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SYMPTOMS
========

Your computer may issue a 0x7F bug check upon receiving a FAT media Cyclic
Redundancy Check (CRC) error message.

CAUSE
=====

When Fastfat.sys does not read data from the media because of a CRC error
message, Fastfat.sys falls into infinite loop and the kernel stack soon
overflows (stop 0x7F).

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-language version of this fix should have the following file
attributes or later:

   Date      Time     Size      File name     Platform
   ---------------------------------------------------
   09/08/99  10:57a   136,560   Fastfat.sys   x86
   09/08/99  10:55a   240,048   Fastfat.sys   Alpha



STATUS
======

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


Additional query words:

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Keywords          : kbWinNT400PreSP7Fix 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTSEntSearch kbWinNTSEnt400 kbWinNTS400search kbWinNTS400
Version           : :4.0
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbfix

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