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Date:      Sun, 14 Jun 1998 18:25:51 -0500
From:      Karl Denninger  <karl@mcs.net>
To:        John Polstra <jdp@polstra.com>
Cc:        julian@whistle.com, current@FreeBSD.ORG
Subject:   Re: personal use of softupdates
Message-ID:  <19980614182551.39828@mcs.net>
In-Reply-To: <199806142230.PAA00726@austin.polstra.com>; from John Polstra on Sun, Jun 14, 1998 at 03:30:48PM -0700
References:  <Pine.BSF.3.95.980613135848.5313A-100000@current1.whistle.com> <199806142230.PAA00726@austin.polstra.com>

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On Sun, Jun 14, 1998 at 03:30:48PM -0700, John Polstra wrote:
> In article <Pine.BSF.3.95.980613135848.5313A-100000@current1.whistle.com>,
> Julian Elischer  <julian@whistle.com> wrote:
> 
> > and use tunefs -n enable
> > on the unmounted filesystem to enable it.
> 
> Is there some tricky way to do this on the root filesystem without
> having to boot from a floppy?  Root is mounted even if you boot
> single-user, so tunefs says "device busy" if you try to use it on
> the block device.  It's possible to use it on the character device,
> but then the change doesn't stick.

If you boot single user and are mounted read-only (which you will be
assuming you are coming up from a clean shutdown) do this:

sync
sync
tunefs -n enable /dev/rsd0s1a
<IMMEDIATELY PRESS RESET>

That should do it.  I've done this on a couple of systems and its been fine.

--
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