linux-kernel - Re: document ext3 requirements

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Message-ID: <4960BB2D.3060000@gmail.com>
Date:	Sun, 04 Jan 2009 18:35:41 +0500
From:	"Alexander E. Patrakov" <patrakov@...il.com>
To:	Pavel Machek <pavel@...e.cz>
CC:	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, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: document ext3 requirements

Pavel Machek wrote:
[CC: Alan Cox because of his reply in the "XFS internal error" thread]

> Using ext3 is only safe if storage subsystem meets certain
> criteria. Document those.

Thanks for this patch. However, after reading this, I have a stupid 
question: which file system should I use if I had to reinstall my 
computers from scratch now?

Ext3 means either hardware that supports barriers (not sure how to 
check, and anyway I have to use encryption on the work laptop due to the 
corporate policy) or disabling write cache (but, as Alan Cox said, this 
shortens the lifespan of the disk). Does this requirement apply to other 
journaling filesystems? Do I need journaling at all, given that I have 
an UPS on my desktop and a battery in the laptop?

-- 
Alexander E. Patrakov
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