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Date:      Mon, 3 Mar 1997 11:23:56 +0100
From:      j@uriah.heep.sax.de (J Wunsch)
To:        rkw@dataplex.net (Richard Wackerbarth)
Cc:        hackers@freebsd.org
Subject:   Re: SCSI setup help !!!
Message-ID:  <Mutt.19970303112356.j@uriah.heep.sax.de>
In-Reply-To: <l03010d07af4020b3180f@[208.2.87.4]>; from Richard Wackerbarth on Mar 3, 1997 00:53:08 -0600
References:  <l03010d07af4020b3180f@[208.2.87.4]>

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As Richard Wackerbarth wrote:

> Everything seemed fine. It ask if I wanted to leave something to stay
> compatible.
> I said "yes".

That's been your problem. :)  No no, rather that you've got the geometry
wrong.

> However, when I try to reboot, I get told that I have no OS.
> 
> I tried "disklabel -B sd0" and that did not help either.

For sure, it wouldn't help.

The only help short of a reinstall is to hand-tweak the fdisk table.
Go through fdisk, pick the slice's starting block number, recompute
the C/H/S number for whatever your BIOS thinks the geometry of the
disk were, and enter this one.  (It's probably an ``odd'' value,
something starting ``in the middle'' of a track.)  Enter some bogus
but reasonable :) value for ending C/H/S, like 1023/63/255.  This
should get you going again.

Keep Win95 or other poisoned systems away.  The might consider this
fdisk table invalid, and happily destroy `invalid' fdisk tables
without warning or asking you.  So in the end, you end up with an
incompatible fdisk table the hard way :-), by also wasting more
sectors than using ``DD'' mode in the first place...

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)



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