linux-ext4 - Re: Add a norecovery option to ext3/4?

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Message-ID: <20070411200639.GC5881@ucw.cz>
Date:	Wed, 11 Apr 2007 20:06:39 +0000
From:	Pavel Machek <pavel@....cz>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	Samuel Thibault <samuel.thibault@...-lyon.org>,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Add a norecovery option to ext3/4?

Hi!

> >Distribution installers usually try to probe OSes for 
> >building a suited
> >grub menu.  Unfortunately, mounting an ext3 partition, 
> >even in read-only
> >mode, does perform some operations on the filesystem 
> >(log recovery).
> >This is not a good idea since it may silently garbage 
> >data.  
> 
> Can you elaborate?  Under what circumstances is log 
> replay going to harm data?  Do you mean that the 

Suspend machine, boot from CD trying to read from HDD, resume. People
lost data because of this trap.

Imagine _broken_ disk, with hw dying. Would you rather replay log,
possibly corrupting it even more, or read few files you do care about?

							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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