Antivirus Software Excludes

Double Image and Double Image-O are designed to perform well with little CPU use, allowing you to continue using your PC while a backup occurs.

Antivirus software will usually cause poor CPU and Disk IO performance with disk-to-disk backup software.

If you are not running Antivirus software on your machine, you can disregard this topic.

Below is a topic that describes the problem and how to easily overcome the CPU and IO performance problem.

The Problem

By design, Disk-to-disk backup software, like Double Image, can perform many disk reads and disk writes to accomplish a backup.

Double Image disk writes cause Antivirus software to perform a too much disk scanning on the written blocks. The symptoms are very poor CPU and disk IO performance.

The Cure

For Antivirus software and Double Image/Double Image-O to co-exist on the same PC/Server, the Antivirus software needs to be configured to EXCLUDE the following drives and folders:

Double Image Target directory or folder - ( the destination drive and/or backup folders )

See the Destination folder at the top of the Double Image user interface;
then Exclude the drive or drive, folder from the Antivirus software.

Open File Copy cache file location

On the Double Image user interface window, Select Open File Copy - Options
Choose 'Specify settings manually'
Change the 'Cache file location' to a drive and folder with adequate space for the size of the cache.
From the menu, [File, Save] the backup profile
One time only:
From the menu, [File, Save as Default]. In the future when you create new backup profiles, the backup option changes you made above, will now be carried to new profile backup options.

Example of Excluding a Target drive from Symantec Antivirus™

Exclude drives and folders that Double Image performs lots of disk writes to.

Example of changing the Double Image Cache file location

Change the Double Image Cache file location to a common location, then Exclude from Antivirus scans. In the example below the new Cache file location has been changed to D:\temp. Therefore D:\temp should be excluded from the Antivirus scans. See configuration for the Antivirus software running on your PC.

Change the cache file location to a common place and then Exclude from Antivirus scans

Double Image should run with little performance overhead. If performance continues to be a problem let us know by visiting our online Help Desk.