KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q82738: Using Central Point Backup with Windows 3.1

Article: Q82738
Product(s): Microsoft Windows 95.x Retail Product
Version(s): WINDOWS:3.1,3.11
Operating System(s): 
Keyword(s): 
Last Modified: 25-OCT-1999

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

- Microsoft Windows versions 3.1, 3.11 
-------------------------------------------------------------------------------

SUMMARY
=======

If you run Central Point Backup version 7.0 or 7.1 for MS-DOS under Windows
version 3.1, DMA buffer size may be too small. To increase the DMA buffer size,
add the following line to the SYSTEM.INI file under the [386Enh] section:

     DMABUFFERSIZE=18

You may need to experiment to find a value that works on your machine. A value in
the range of 18 to 64 should work correctly.

If you have problems running Central Point Backup when TrueType fonts are
enabled, increase the BUFFERS setting in the CONFIG.SYS file to at least 30.

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

Some tape backup systems require that DMABUFFERSIZE be set to 64, which is what
Central Point recommends. The disadvantage of increasing the buffer size is that
increasing the DMA buffer size uses up conventional memory for all applications
running under Windows.

The Windows version of Central Point Backup does not require the increase in DMA
buffer size. If you are going to use a backup program under Windows, Microsoft
recommends you use a Windows backup program, such as the one that comes with PC
Tools.

Some tape backup systems may run successfully no matter what setting is used for
the DMA buffer size. Resetting the DMA buffer size will not enhance performance
on such systems, even though the DMA buffer message is displayed. For more
information about using Central Point Backup with such systems, contact Central
Point Software.

The Central Point Backup product included here is manufactured by a vendor
independent of Microsoft; we make no warranty, implied or otherwise, regarding
this product's performance or reliability.

Additional query words: 3.10

======================================================================
Keywords          :  
Technology        : kbWin3xSearch kbZNotKeyword3 kbWin310 kbWin311
Version           : WINDOWS:3.1,3.11

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

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.