linux-ext4 - Re: raid is dangerous but that's secret (was Re: [patch] ext2/3: document conditions when reliable operation is possible)

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Message-ID: <m3ab1cnn7y.fsf@intrepid.localdomain>
Date:	Thu, 03 Sep 2009 15:59:13 +0200
From:	Krzysztof Halasa <khc@...waw.pl>
To:	Ric Wheeler <rwheeler@...hat.com>
Cc:	Christoph Hellwig <hch@...radead.org>, Mark Lord <lkml@....ca>,
	Michael Tokarev <mjt@....msk.ru>, david@...g.hm,
	Pavel Machek <pavel@....cz>, Theodore Tso <tytso@....edu>,
	NeilBrown <neilb@...e.de>, Rob Landley <rob@...dley.net>,
	Florian Weimer <fweimer@....de>,
	Goswin von Brederlow <goswin-v-b@....de>,
	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: raid is dangerous but that's secret (was Re: [patch] ext2/3: document conditions when reliable operation is possible)

Ric Wheeler <rwheeler@...hat.com> writes:

> We (red hat) have all kinds of different raid boxes...

A have no doubt about it, but are those you know equipped with
battery-backed write-back cache? Are they using SATA disks?

We can _at_best_ compare non-battery-backed RAID using SATA disks with
what we typically have in a PC.
-- 
Krzysztof Halasa
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