From: Ric Wheeler <rwheeler@redhat.com>
Subject: Re: raid is dangerous but that's secret (was Re: [patch] ext2/3:
 document conditions when reliable operation is possible)
Date: Thu, 03 Sep 2009 07:18:10 -0400
Message-ID: <4A9FA5F2.9090704@redhat.com>
References: <20090828064449.GA27528@elf.ucw.cz>	<20090828120854.GA8153@mit.edu> <20090830075135.GA1874@ucw.cz>	<alpine.DEB.2.00.0908300550320.6822@asgard.lang.hm>	<4A9A88B6.9050902@redhat.com> <4A9A9034.8000703@msgid.tls.msk.ru>	<20090830163513.GA25899@infradead.org> <4A9BCCEF.7010402@redhat.com>	<20090831131626.GA17325@infradead.org> <4A9BCDFE.50008@rtr.ca>	<20090831132139.GA5425@infradead.org> <4A9F230F.40707@redhat.com> <m3ab1cp9ii.fsf@intrepid.localdomain>
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Cc: Christoph Hellwig <hch@infradead.org>, Mark Lord <lkml@rtr.ca>,
	Michael Tokarev <mjt@tls.msk.ru>, david@lang.hm,
	Pavel Machek <pavel@ucw.cz>, Theodore Tso <tytso@mit.edu>,
	NeilBrown <neilb@suse.de>, Rob Landley <rob@landley.net>,
	Florian Weimer <fweimer@bfk.de>,
	Goswin von Brederlow <goswin-v-b@web.de>,
	kernel list <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@osdl.org>, mtk.manpages@gmail.com,
	rdunlap@xenotime.net, linux-doc@vger.kernel.org,
	linux-ext4@vger.kernel.org, corbet@lwn.net
To: Krzysztof Halasa <khc@pm.waw.pl>
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On 09/03/2009 07:12 AM, Krzysztof Halasa wrote:
> Ric Wheeler<rwheeler@redhat.com>  writes:
>
>> Just to add some support to this, all of the external RAID arrays that
>> I know of normally run with write cache disabled on the component
>> drives.
>
> Do they use "off the shelf" SATA (or PATA) disks, and if so, which ones?

Which drives various vendors ships changes with specific products. Usually, they 
ship drives that have carefully vetted firmware, etc. but they are close to the 
same drives you buy on the open market.

Seagate has a huge slice of the market,

ric