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Date:      Sat, 16 Dec 2000 08:27:08 +0100 (MET)
From:      Helge Oldach <Helge.Oldach@de.origin-it.com>
To:        gross@clones.com (Glendon Gross)
Cc:        grog@lemis.com, mike@argos.org, imp@village.org, samz@oz.net, stable@FreeBSD.ORG
Subject:   Re: Dedicated disks (was: Dangerously Dedicated)
Message-ID:  <200012160727.IAA28032@galaxy.de.cp.philips.com>
In-Reply-To: <Pine.LNX.4.20.0012151811200.11743-100000@mail.clones.com> from Glendon Gross at "Dec 15, 2000  6:18:21 pm"

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Glendon Gross:
>Is there anyone interested in rewriting that "fake" partition table,

Please look at the thread with the same topic three weeks ago.

I stated that it wouldn't be possible because there is a fundamental
disagreement:

BIOS standard demands that the first *sector* always remains reserved.
However DD mode only reserves the first *block* and starts with the
actual contents at the second block. This (intentionally) violates BIOS
standards. Though many BIOSsen will happily accept it, some will get
picky and refuse to boot a DD disk due to standards violation.

If you would leave the first *sector* reserved with DD mode, you are
basically left with the layout of non-DD mode, so this is pointless.

>or is that requirement satisfied by the non-dedicated format?

Exactly. Non-DD follows the BIOS standards, so it will serve you fine,
at the "expense" of losing some few kB of disk space.

>it
>would be aesthetically more pleasing to be able to use the 
>dedicated format.

Fully agree. However there are things in the BIOS architecture that
don't care about aesthetics. After all, this is the PC world.

Helge


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