linux-kernel - Re: document ext3 requirements

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Date:	Sat, 3 Jan 2009 22:17:15 +0000
From:	"Duane Griffin" <duaneg@...da.com>
To:	"Martin MOKREJŠ" 
	<mmokrejs@...osome.natur.cuni.cz>
Cc:	"Pavel Machek" <pavel@...e.cz>,
	"kernel list" <linux-kernel@...r.kernel.org>,
	"Andrew Morton" <akpm@...l.org>, tytso@....edu,
	mtk.manpages@...il.com, rdunlap@...otime.net,
	linux-doc@...r.kernel.org
Subject: Re: document ext3 requirements

[Fixed top-posting]

2009/1/3 Martin MOKREJŠ <mmokrejs@...osome.natur.cuni.cz>:
> Pavel Machek wrote:
>> readonly mount does actually write to the media in some cases. Document that.
>>
> Can one avoid replay of the journal then if it would be unclean?
> Just curious.

Nope. If the underlying block device is read-only then mounting the
filesystem will fail. I tried to fix this some time ago, and have a
set of patches that almost always work, but "almost always" isn't good
enough. Unfortunately I never managed to figure out a way to finish it
off without disgusting hacks or major surgery.

> M.

Cheers,
Duane.

-- 
"I never could learn to drink that blood and call it wine" - Bob Dylan
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