How to prevent new installations when I have already installed my client through LAN boot?

[Andreas Schockenhoff]

Dear Ivan,

Am Sonntag, den 05.02.2012, 20:41 -0200 schrieb Ivan Reche:
> I'm using FAI to automatically install Debian Squeeze in a laptop of
> mine. I've been able to do everything that I wanted by reading the
> documentation, except for one thing: every time the installation
> finishes (and the system reboots automatically, as I ask it to), the
> recently installed client boots again through the LAN (as expected)
> but begins the installation process again (something that I want to
> avoid).
> Is there an automatic way to make the client prevent itself from
> reinstalling after the first install? I want it to install itself
> again only if needed using the fai-chboot program, but not every time.

I use a different way: I have the hard disk as first boot device and
after deleting the hard disk with dd. Next reboot the BIOS skip the hard
disk and a fai netboot installs a new system.

Some BIOS also have a key to select the boot device from list.

regards Andreas