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Date:      Sat, 20 Mar 1999 15:19:07 -0500
From:      "David E. Cross" <crossd@cs.rpi.edu>
To:        Mike Smith <mike@smith.net.au>
Cc:        "Daniel C. Sobral" <dcs@newsguy.com>, =?iso-8859-1?Q?S=F8ren?= Schmidt <sos@freebsd.dk>, current@FreeBSD.ORG, crossd@cs.rpi.edu
Subject:   Re: How to add a new bootdevice to the new boot code ??? 
Message-ID:  <199903202019.PAA08940@cs.rpi.edu>
In-Reply-To: Message from Mike Smith <mike@smith.net.au>  of "Sat, 20 Mar 1999 11:44:20 PST." <199903201944.LAA12569@dingo.cdrom.com> 

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> > The major number passed to the kernel is a product of a lot of
> > guesswork, because the loader has simply not enough information. I
> > have added a bit of code to my version of loader so you can use the
> > variable root_device_major_number to override the major number to be
> > passed to the kernel. I'm inclined to commit it, but I expect strong
> > objections from Mike, who wants the right thing done before we go
> > too far with these hacks.
> 
> Correct.
> 
> I'm currently leaning heavily towards a tunable which can be set to 
> explicitly control the device the root filesystem is loaded from, eg.
> 
>  set kern.rootdev.device=da0s1a

How hard would it be to have /boot/loader get the major number from the
filesystem itself?  Just have it read the node entry for /dev/$rootdev
(or similiar).

--
David Cross


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