linux-kernel - Re: Why aren't partitions limited to fit within the device?

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Message-ID: <20061016060227.GA3090@apps.cwi.nl>
Date:	Mon, 16 Oct 2006 08:02:27 +0200
From:	Andries Brouwer <Andries.Brouwer@....nl>
To:	Neil Brown <neilb@...e.de>
Cc:	vherva@...nova.fi, linux-kernel@...r.kernel.org,
	Andries.Brouwer@....nl, Jens Axboe <jens.axboe@...cle.com>
Subject: Re: Why aren't partitions limited to fit within the device?

On Mon, Oct 16, 2006 at 09:50:15AM +1000, Neil Brown wrote:
> On Sunday October 15, vherva@...nova.fi wrote:

> > I wonder if there's ever a change the kernel partition detection code could
> > _write_ on the disk, even when there's really no partition table?
> 
> No, kernel partition detection never writes.

There is something else that writes, however, that I have gotten complaints about.
(But I have not investigated.)
People doing forensics take a copy of a disk and want to preserve
that copy as-is, never changing a single bit, only looking at it.
But it is reported that also when a partition is mounted read-only,
the journaling code of ext3 will write to the journal.

Andries
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