Is it OK to run Drive wipe with my computer conected to Internet

Can I run Drive wipe whilst conected to internet and surfing, or is it better to close all apps down while Drive wipe does its thing?

A drive wipe consists of filling the drive with dummy files and then deleting them, so it would be better to close everything and go for a coffee/fag/beer/etc whilst the wipe is in progress.

What's not allowed is to have two userids on the forum. Did you forget the password to this userid?