KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q93599: Difference Between DBLSPACE /CHKDSK and CHKDSK

Article: Q93599
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:6.0
Operating System(s): 
Keyword(s): 
Last Modified: 26-NOV-1999

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft MS-DOS operating system version 6.0 
-------------------------------------------------------------------------------

SUMMARY
=======

When you run DoubleSpace with the /CHKDSK switch (for example, type DBLSPACE
/CHKDSK) on a DoubleSpace partition, it analyzes the DoubleSpace file allocation
table (FAT) for consistency. The DoubleSpace FAT is a separate data structure
from the MS-DOS FAT.

To check the DoubleSpace FAT and the MS-DOS FAT, you must run both DBLSPACE
/CHKDSK and CHKDSK on the DoubleSpace drive. To analyze and repair any problems,
add the /F switch to both commands.

NOTE: If CHKDSK, or CHKDSK /F, is run on a compressed drive, it automatically
runs DBLSPACE /CHKDSK, or DBLSPACE /CHKDSK /F,when finished. If DBLSPACE /CHKDSK
is not invoked, check to make sure DBLSPACE.EXE is located in the same directory
as CHKDSK.EXE.

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

MS-DOS maintains a data structure for the FAT that maintains a "map" of the disk
usage (both files and free space) recording the status of each sector on the
disk. When DoubleSpace is installed, it creates its own FAT and maps the MS-DOS
FAT to the DoubleSpace FAT.


Additional query words: 6.00 double space

======================================================================
Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS600
Version           : MS-DOS:6.0

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

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.