linux-kernel - Re: Promise PDC20376

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Date:	Tue, 2 Dec 2008 10:50:53 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"David Ellingsworth" <david@...ntd.dyndns.org>
Cc:	"Mikael Pettersson" <mikpe@...uu.se>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Promise PDC20376

> A small update to this. It seems the above mentioned interrupt fails
> somewhere around the 128GB boundary. Interrupt 13h, AH=42 uses a 64
> bit sector address and should be capable of addressing the entire
> drive. For a SATA controller, this limitation seems relatively
> arbitrary. For IDE controllers, a limitation such as this is
> apparently common.

137GB I would imagine. That is the point at which LBA48 commands must be
used not LBA28 and presumably their BIOS code only supports old format
commands
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