Hidden spot on hard drives?

[Joe S]

Jonathon McKitrick wrote:
> the company where I work (with Windows) is evaluating a copy protection
> product that stores info somewhere on the HDD where the user cannot touch it,
> a format will not erase it, and Norton Ghost will not find it.
> 
> 1.  Any idea where this info could be stored?
> 2.  Any way the same thing could be done under FreeBSD?
> 
> Thanks,
> 
> jm

# dd if=/dev/zero of=/dev/zero

Will overwrite the entire drive.