linux-kernel - Re: [PATCH 1/3] ide: add "ignore

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Message-ID: <20090526180821.GB13276@ub>
Date:	Tue, 26 May 2009 20:08:21 +0200
From:	"Andries E. Brouwer" <Andries.Brouwer@....nl>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Frans Pop <elendil@...net.nl>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] ide: add "ignore_hpa" module parameter

On Tue, May 26, 2009 at 02:01:32PM +0100, Alan Cox wrote:
> > Naive thought: wouldn't it be possible to check whether a partition 
> > overlaps the HPA boundary and warn or even bug out in that case?
> 
> No - believe me we all thought about that. The PC partition format has
> starts but not ends so you need detailed internal file system knowledge
> to play guessing games (which thus needs to be user space). Some of the
> non PC formats use the middle or end of disk so if you don't know the
> size you can't *find* the partition data.
> 
> Alan

Hi Alan,

Probably I am missing some context, but the above seems to be
a false statement. The PC partition format does give you
start and size, and no filesystem knowledge is needed to
find out where a partition ends.

Andries

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