Using Central Point Backup with Windows 3.1 (82738)

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.