FOG was created to have Ghost-like backup functionality using PXE and TFTP for network booting, and acquired a whole bunch of features in the process, such as disk wiping. From a clean web interface you can have FOG backup up the hard disk contents then use the "wipe" feature to erase the hard drive, quickly or thoroughly . FOG can handle as many client connections as your hardware can handle, but it's common to see a FOG server easily handle 10 or more client PCs at once.

In the latest version of FOG (0.32) there is a "wipe" feature which will remove data from the hard drive. There are Fast, Normal and Full wipe options which range from simply overwriting the MBR to filling the entire drive with random data.