linux-kernel - Re: [patch] ext2/3: document conditions when reliable operation is possible

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Message-ID: <20090825093414.GB15563@elf.ucw.cz>
Date:	Tue, 25 Aug 2009 11:34:15 +0200
From:	Pavel Machek <pavel@....cz>
To:	Ric Wheeler <rwheeler@...hat.com>
Cc:	Theodore Tso <tytso@....edu>, Florian Weimer <fweimer@....de>,
	Goswin von Brederlow <goswin-v-b@....de>,
	Rob Landley <rob@...dley.net>,
	kernel list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>, mtk.manpages@...il.com,
	rdunlap@...otime.net, linux-doc@...r.kernel.org,
	linux-ext4@...r.kernel.org, corbet@....net
Subject: Re: [patch] ext2/3: document conditions when reliable operation is
	possible

Hi!

>>> If your concern is that with Linux MD, you could potentially lose an
>>> entire stripe in RAID 5 mode, then you should say that explicitly; but
>>> again, this isn't a filesystem specific cliam; it's true for all
>>> filesystems.  I don't know of any file system that can survive having
>>> a RAID stripe-shaped-hole blown into the middle of it due to a power
>>> failure.
>>>     
>>
>> Again, ext2 handles that in a way user expects it.
>>
>> At least I was teached "ext2 needs fsck after powerfail; ext3 can
>> handle powerfails just ok".
>
> So, would you be happy if ext3 fsck was always run on reboot (at least  
> for flash devices)?

For flash devices, MD Raid 5 and anything else that needs it; yes that
would make me happy ;-).

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