Message-ID: <4960FE39.2060307@msgid.tls.msk.ru>
Date: Sun, 04 Jan 2009 21:21:45 +0300
From: Michael Tokarev <mjt@tls.msk.ru>
Organization: Telecom Service, JSC
User-Agent: Mozilla-Thunderbird 2.0.0.17 (X11/20081018)
MIME-Version: 1.0
To: "Alexander E. Patrakov" <patrakov@gmail.com>
CC: Pavel Machek <pavel@suse.cz>, kernel list <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@osdl.org>, tytso@mit.edu, mtk.manpages@gmail.com,
       rdunlap@xenotime.net, linux-doc@vger.kernel.org,
       Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: document ext3 requirements
References: <20090103123813.GA1512@ucw.cz> <4960BB2D.3060000@gmail.com>
In-Reply-To: <4960BB2D.3060000@gmail.com>
OpenPGP: id=4F9CF57E
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 941
Lines: 22

Alexander E. Patrakov wrote:
[]
> 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?

There's another possibility too, somewhat more risky.  Namely, run with
write cache ON by default, and switch it off when running off battery
(either UPS or notebook).  Should save both worlds, PROVIDED the battery
actually/UPS works :)

/mjt


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/