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Date:      Tue, 15 May 2007 13:47:46 +0200
From:      Pieter de Goeje <pieter@degoeje.nl>
To:        Sam Lawrance <boris@brooknet.com.au>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Skipping "F1 FreeBSD" prompt on boot
Message-ID:  <200705151347.47171.pieter@degoeje.nl>
In-Reply-To: <E35D79DD-167F-4FD1-89F7-A79435463225@brooknet.com.au>
References:  <46458C63.8040600@landgren.net> <200705140241.43492.pieter@degoeje.nl> <E35D79DD-167F-4FD1-89F7-A79435463225@brooknet.com.au>

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On Tuesday 15 May 2007, Sam Lawrance wrote:
> On 14/05/2007, at 10:41 AM, Pieter de Goeje wrote:
> > On Sunday 13 May 2007, David Landgren wrote:
> >> Sam Lawrance wrote:
> >>> On 13/05/2007, at 6:15 PM, Matthew Seaman wrote:
> >>>> -----BEGIN PGP SIGNED MESSAGE-----
> >>>> Hash: SHA256
> >>>>
> >>>> Sam Lawrance wrote:
> >>>>> On 12/05/2007, at 8:59 PM, Matthew Seaman wrote:
> >>>>>> -----BEGIN PGP SIGNED MESSAGE-----
> >>>>>> Hash: SHA256
> >>>>>>
> >>>>>> David Landgren wrote:
> >>>>>>> I have a disk that has only FreeBSD on it, and so I would
> >>>>>>> like to
> >>>>>>> skip the initial F1/FreeBSD prompt. boot0cfg -v ad0 says:
> >>>>>>>
> >>>>>>> options=nopacket,update,nosetdrv
> >>>>>>> default_selection=F1 (Slice 1)
> >>>>>>>
> >>>>>>> ... what do I have to do to say JFDI instead of prompting?
> >>>>>>> This is
> >>>>>>> not the sort of thing I want to fiddle around experimenting,
> >>>>>>> so a
> >>>>>>> little guidance would be most appreciated.
> >>>>>>
> >>>>>> fdisk -B -b /boot/mbr /dev/ad0
> >>>>>>
> >>>>>> You installed the FreeBSD boot sector stuff, which gives you the
> >>>>>> 'press F1'  business.  Replace that with the standard mbr,
> >>>>>> which just
> >>>>>> boots straight up.
> >>>>>
> >>>>> Rather than replacing it, you can use boot0cfg to set a really
> >>>>> short
> >>>>> timeout instead; in case you might want that functionality one
> >>>>> day.
> >>>>
> >>>> Heh.  It's not like you only get one chance to rewrite the boot
> >>>> blocks
> >>>> on any particular drive.  If anyone needs to (re-)install the
> >>>> FreeBSD
> >>>> boot
> >>>> blocks, then you can do very simply it by:
> >>>>
> >>>>    boot0cfg -B -b /boot/boot0 /dev/ad0
> >>>>
> >>>> or even
> >>>>
> >>>>    fdisk -B -b /boot/boot0 /dev/ad0
> >>>>
> >>>> Or if you need to boot from a serial console you can change /
> >>>> boot/boot0
> >>>> to /boot/boot0sio
> >>>
> >>> Sure, but why get rid of it, when leaving it in with a short timeout
> >>> costs you nothing.
> >>
> >> A fair point, but in this particular case, FreeBSD is the only
> >> thing on
> >> the drive, and likely to remain that way until the disk dies of
> >> mechanical failure. I just don't need that prompt, especially the
> >> annoying beep it makes.
> >
> > The beep was removed since May 2006 (6.2-RELEASE, 6-STABLE, HEAD).
> > A simple
> > #boot0cfg -B /dev/adX
> > should get rid of it.
>
> I thought I remembered that!  Wasn't it removed to reclaim a couple
> extra bytes? :-)
Quote from the commit log:
"Restore the pre-5.x behavior of only beeping if the user makes a bad
selection and not always beeping on startup.  The two bytes for the extra
'jmp' instruction were obtained by removing recognition of BSD/OS
partitions."

Cheers,
Pieter de Goeje



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