Write-behind caching
These instructions deal with settings that will affect the performance of your machines. Although these are standard procedures and should not require an expert to perform them, you should have a fair amount of experience with computers before attempting to configure any of the settings described here.

There are issues with using write-behind caching on .tps files (.tps files are the files that store your data and configurations in CompuChem applications, i.e.: our file system) that can cause file corruption and/or data loss.
To avoid this please switch off write-behind caching on all workstations that access our programs, do this by following these steps:

On Windows© 98 machines:

  1. Select: Start > Control Panel > System > Performance > File System. On the Hard Disk tab locate the slider that controls Read ahead optimisation and slide it all the way to the left:

    notice that the text under the slider changes with each measure you slide it back.
  2. Select the Troubleshooting tab and tick the option: Disable write behind caching for all drives.
  3. Accept all changes by clicking Ok twice, then restart your computer to initialise the new settings.

On Windows© 2000 machines:

  1. Right Click My Computer, select Properties > Device Manager
  2. For each hard drive right click and select Properties, on the Drive Settings tab clear the tick out of the box labeled: 'Write behind cache enabled'.

On Windows© XP machines:

  1. Right Click My Computer, select Properties
  2. Select the Hardware tab and click the Device Manager button
  3. For each hard drive right click and select Properties, on the Policies tab clear the tick out of the box labeled: 'Enable write caching on the disk'.

Another important step to take is to exclude files of type: *.tps from any anti virus software that may be running on your system/network.

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