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Date:      Thu, 11 Dec 2008 10:52:49 +0200
From:      Jonathan McKeown <jonathan@hst.org.za>
To:        freebsd-hackers@freebsd.org
Cc:        Giorgos Keramidas <keramida@ceid.upatras.gr>, Jonathan McKeown <jonathan+freebsd-hackers@hst.org.za>
Subject:   Re: Enhancing cdboot [patch for review]
Message-ID:  <200812111052.50082.jonathan@hst.org.za>
In-Reply-To: <87prjzw156.fsf@kobe.laptop>
References:  <493DA269.2070805@FreeBSD.org> <200812110837.26316.jonathan%2Bfreebsd-hackers@hst.org.za> <87prjzw156.fsf@kobe.laptop>

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On Thursday 11 December 2008 10:45:41 Giorgos Keramidas wrote:
> On Thu, 11 Dec 2008 08:37:26 +0200, Jonathan McKeown 
<jonathan+freebsd-hackers@hst.org.za> wrote:
> > While you're enhancing cdboot anyway, can I ask how complicated it
> > would be to make cdboot serial-console capable? (I'm not a C
> > programmer, I'm a sysadmin - but I'd be prepared to try and look at
> > this myself if no-one else is interested).
> >
> > As it stands, the only way I've found to do a serial-console CD-based
> > installation is by enabling the serial console in /boot/loader.conf,
> > by which time you've already missed several useful points,
> > particularly the entry to BIOS settings (if you have a serial-capable
> > BIOS).
>
> cdboot runs long after the prompt for BIOS setup.  I don't think we can
> modify cdboot to add serial console support to systems whose BIOS setup
> doesn't support it.

Sorry, of course you're right: I'm talking nonsense.

It's the stage immediately after that that isn't available. I wish I could 
remember why I thought that had caused me a problem once.

Certainly there's a big chunk of the boot process that is accessible through a 
serial console on a disk-based boot that's not available on a serial-console 
boot.



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