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Date:      Wed, 05 Jan 2005 21:17:57 +0100
From:      Torfinn Ingolfsen <torfinn.ingolfsen@broadpark.no>
To:        freebsd-mobile@freebsd.org
Subject:   Re: IBM T42p Hard Drive Issue
Message-ID:  <20050105211757.5e7fb41a.torfinn.ingolfsen@broadpark.no>
In-Reply-To: <86llb7oglm.fsf@kamino.rfc1149.org>
References:  <5e51d2fd05010509186ce427b3@mail.gmail.com> <5e51d2fd0501051018197d1f37@mail.gmail.com> <Pine.OSX.4.58.0501051219510.25928@mocha.thcproductions.com> <86llb7oglm.fsf@kamino.rfc1149.org>

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On Wed, 05 Jan 2005 19:50:29 +0100
Arne Schwabe <arne@rfc2549.org> wrote:

> Not on the first slice but at the end of the disk, this area seem to
> be empty but it is not. IIrc the bios also reports a lower disk size
> to hide that area but Fbsd ignores that iirc. So be careful when

This is the HPA or "Host Protected Area", and it's kind of a standard on
many drives these days (search on Google for it). I think it was ATA-4
which first implemented it.
Some info here:
http://www.sleuthkit.org/informer/sleuthkit-informer-17.html#hpa
and here:
http://www.techpathways.com/webhelp/Advanced_Tips/Advanced_tips_and_tricks.htm

It seems strange that FreeBSD doesn't
account for the HPA, but stranger things have happened...
-- 
Regards,
Torfinn Ingolfsen,
Norway




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