DOCUMENT:Q103488  04-NOV-1993  [W_NT]
TITLE   :IBM ThinkPad 700c and 720c Must Boot Windows NT Using FAT
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:

-----------------------------------------------------------------------
The information in this article applies to:
 
 - Microsoft Windows NT operating system version 3.1
 - Microsoft Windows NT Advanced Server version 3.1
-----------------------------------------------------------------------
 
When you install Windows NT on an IBM ThinkPad 700c or 720c portable
computer and you attempt to convert the boot partition to the NTFS
file system, you may receive the following error message after
rebooting the computer:
 
   FAT structure in area required by NTFS
   Bad Sector in required areas of volume.
 
Before you install Windows NT on an IBM ThinkPad 700c or 720c
portable, an ABIOS patch must be applied. After these files are
applied, you will be unable to convert the file system of the boot
drive to NTFS.
 
This is by design. Windows NT refuses to convert the volume to NTFS
because the existing BIOS Parameter Block (BPB) conflicts with the
disk geometry information returned by the file system driver.
 
Conversion requires these two sources of information about disk
geometry to be consistent because Convert writes a new BPB based on
the information it obtains from the file system driver. If Convert
writes a BPB that conflicts with the BPB expected by the BIOS (that
is, the existing BPB), you will not be able to boot from that disk.
 
Additional reference words: 3.10 W_NTAS
KBCategory:
KBSubcategory: filsys

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

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 1993.