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Date:      Sun, 21 Feb 1999 10:45:40 +1030
From:      Greg Lehey <grog@lemis.com>
To:        Kenneth Chiu <chiuk@cs.indiana.edu>, Greg Black <gjb@comkey.com.au>
Cc:        freebsd-questions@FreeBSD.org
Subject:   Re: BSD filesystems & MBR
Message-ID:  <19990221104540.V93492@lemis.com>
In-Reply-To: <Pine.BSF.3.96.990220120830.691A-100000@bakery.chiu.nom>; from Kenneth Chiu on Sat, Feb 20, 1999 at 02:53:06PM -0500
References:  <19990220010713.3722.qmail@alpha.comkey.com.au> <Pine.BSF.3.96.990220120830.691A-100000@bakery.chiu.nom>

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On Saturday, 20 February 1999 at 14:53:06 -0500, Kenneth Chiu wrote:
> On Sat, 20 Feb 1999, Greg Black wrote:
>>> Optionally, but not recommended, you can make the disk "dangerously
>>> dedicated".
>>
>> I keep seeing references that repeat this advice, but I have not
>> seen any compelling reasons for it.  Is there any real reason
>> why, on a machine that will never run anything but FreeBSD, this
>> could present a problem?
>
> The only "real" reason that I know of is the one that came across
> the lists recently.  As I understand it, the BIOS on a particular
> machine gets confused by the absence of a "normal" partition table,
> causing it to pass bogus data to the boot blocks.

Correct, I've heard this too.  I've seen a lot of discussion on the
subject, and I'm no wiser.  Some claim that dangerously dedicated
disks don't work at all with modern BIOSes; others make a distinction
between safely dedicated and dangerously dedicated.  All don't supply
enough information to convince me, but I haven't had time to look at
it myself.

Greg
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