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Date:      Fri, 3 Nov 1995 14:13:22 +0000 (GMT)
From:      Paul Richards <paul@ns0.netcraft.co.uk>
To:        d_burr@ix.netcom.com (Donald Burr)
Cc:        freebsd-questions@FreeBSD.org, freebsd-hardware@FreeBSD.org, freebsd-scsi@FreeBSD.org
Subject:   Re: Questions -- using IDE with SCSI, and how to add more swap space?
Message-ID:  <199511031413.OAA14376@ns0.netcraft.co.uk>
In-Reply-To: <Pine.BSF.3.91.951103075058.3860B-100000@ncc-1701-d.starfleet.gov> from "Donald Burr" at Nov 3, 95 08:04:18 am

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In reply to Donald Burr who said
> 
> Now, my problem is this: I heard that you can have both IDE and SCSI in 
> the same system, but if you do, the computer will *ALWAYS* boot from the 
> IDE.  This is not what I want, since this would complicate things.  
> BUT... maybe the system only tries booting from the PRIMARY IDE, and 
> leaves the secondary (if it's even there) alone.  I don't know.

Takes some fiddling but there's a few ways you can work around this.

If you're lucky, you can tell the bios that there are no IDE drives
installed. It will then boot from the scsi disk and FreeBSD will find
the IDE controller and disk from it's own probes.

This should work fine for you since it's an external card.

> In fact, I don't even know if you can use a Secondary IDE drive in a 
> system WITHOUT a PRIMARY one...

Set it up as a primary.

If that doesn't work (I has an on-board IDE controller on one box and
the only way to disable the IDE boot was to disable the controller, FreeBSD
didn't re-enable it) then an alternative is to install a BIOS boot block
on the IDE drive that loads the FreeBSD boot code from the SCSI. The only
time you touch the IDE is to load that initial boot block, everything else
will run off the SCSI.

-- 
  Paul Richards, Netcraft Ltd.
  Internet: paul@netcraft.co.uk, http://www.netcraft.co.uk
  Phone: 0370 462071 (Mobile), +44 1225 447500 (work)



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