[Max Lobovsky]

I'm not exactly sure what you mean by "access the other harddrives via the web by someone linking around my site." but I assume you mean have files on the other harddrive be web accesible. The directories that are web accesible on your computer are set in Apache. I'm not sure exactly what the setting will be, but somewhere in the config file, etc, you can map a directory/drive to a web accesible directory.