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Date:      Tue, 17 Nov 2009 13:03:25 -0800
From:      Josef Grosch <jgrosch@es.net>
To:        Modulok <modulok@gmail.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Wester Digital 'deep recovery cycle' and gstripe?
Message-ID:  <4B030F9D.6090801@es.net>
In-Reply-To: <64c038660911171249r141cc810n62a721e48225954c@mail.gmail.com>
References:  <64c038660911171249r141cc810n62a721e48225954c@mail.gmail.com>

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Modulok wrote:
> List,
> 
> Has anyone used 'Wester Digital Caviar Black' disks in a gstripe?
> 
> I'm building a 2TB gstripe, from 3x 1TB disks. My concern, is the
> disks are 'consumer grade' disks. Western Digital mention not to use
> them with a raid controller as they have a potential, 'deep recovery
> cycle', which an last up to 2 minutes. This would theoretically result
> in them being dropped from the array. Despite this, I've heard
> successful uses of these disks via gmirror. (Granted, not the same as
> gstripe). Again, in theory, if one disk enters a 'deep recovery cycle'
> and is dropped from the array, and during that time another disks does
> the same the array is toast, right?
> 
> Umm...what are the odds of this occurring? War stories? (The more I
> type this out, the more it's starting to sound like a bad idea.)
> Thoughts, ideas?
> -Modulok-


YMMV, but. In the past I have not had good luck with Western Digital 
disks, they are 'consumer grade'. It has been my experience that Seagate 
drives hold up better.



My $0.02


Josef

-- 
Josef Grosch				Email  : jgrosch@es.net
Computer Systems Engineer	       	Office : 510-486-6597
Lawrence Berkeley National Laboratory  	Cell   : 510-207-9976




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