Applies To:
  • CitectSCADA 1.00, 1.01, 1.10, 1.11, 1.20, 2.00, 2.01
Summary:
If you don't specify the size of the SMARTDRV cache with a 8Mb computer, it will default to 2Mb under Windows. This default is usually too big if running Citect on this computer. 

Solution:
Configure SMARTDRV to use less memory on a 8Mb computer by specifying the size of the cache as follows (in the AUTOEXEC.BAT file):

SMARTDRV /x 2048 1024

This will configure SMARTDRV to have 2Mb of cache when running with DOS, and 1Mb when running with Windows. The /X option has been used to disable write-behind caching for all drives. If you are using DOS 6.0 and disk compression, we recommend that you disable write-behind caching because there is a chance of destroying all the data on your hard disk. Write-behind caching will only give a performance increase when you are writing a large amount of data to your local hard disk. This will be true if the computer is a Citect Trend server and saving the trend data to its local hard disk, or you have many reports or Cicode writing to data files. Under these conditions use write-behind caching with care.

For a full list of all of SMARTDRV options in a DOS prompt type the command SMARTDRV /?

See Also Q1102 
Keywords:
 

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