Q124854: XCOPY Results in Data Loss When Copying Extremely Large Files

Article: Q124854
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:5.0,6.0,6.2,6.21,6.22
Operating System(s): 
Keyword(s): 
Last Modified: 19-NOV-1999

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The information in this article applies to:

- Microsoft MS-DOS operating system versions 5.0, 6.0, 6.2, 6.21, 6.22 
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SYMPTOMS
========

Running the XCOPY command results in data loss when you try to copy a
15-megabyte (MB) or larger file, such as a compressed volume file (CVF) or
Microsoft Mail folder (MMF).

STATUS
======

Microsoft has confirmed this to be a problem in MS-DOS versions 5.00, 6.00,
6.20, 6.21, and 6.22. We are researching this problem and will post new
information here in the Microsoft Knowledge Base as it becomes available.

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

When you use XCOPY to copy a file 15 MB or larger to another location on the
same drive and that drive has insufficient disk space to do so, XCOPY eventually
reports that there is insufficient disk space, and that no files were copied.
However, the results of a DIR command indicate a new file was created--and that
it takes up approximately the amount of free disk space that existed before you
ran XCOPY. The directory listing also shows that the original file was deleted
and that the system now has the same amount of free disk space as the original
file occupied before running XCOPY.


Additional query words: 5.0 6.0 6.20 6.2 6.21 6.22 5.x 6.x

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Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS621 kbMSDOS622 kbMSDOS620 kbMSDOS600 kbMSDOS500
Version           : MS-DOS:5.0,6.0,6.2,6.21,6.22

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