On Sat, 20 Oct 2007 12:34:33 +0200 Zbigniew Baniewski wrote:

> - to make it non-bootable
> - to remove any signs, that it has been installed there (no boot messages at
>   all, as it were quite "clean" HDD)
> - ...and to keep the possibility to bring it back entirely, using Live-CD

I'm new to NetBSD, but doing this with FreeBSD ist quite easy and I
imagine that the same tools are there for NetBSD too:

Put the kernel (or all of /) on a CD (or some other bootable media). Then
encrypt everything else on the "hidden" machine. Although it sounds pretty
compley, it's actually a pretty straight-forward procedure.

Regards,
Chris