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Date:      Sun, 29 Nov 2009 02:00:17 +0100
From:      Dimitry Andric <dimitry@andric.com>
To:        Wes Morgan <morganw@chemikals.org>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: raidz configuration
Message-ID:  <4B11C7A1.1040801@andric.com>
In-Reply-To: <alpine.BSF.2.00.0911281619570.1379@ibyngvyr.purzvxnyf.bet>
References:  <alpine.BSF.2.00.0911281619570.1379@ibyngvyr.purzvxnyf.bet>

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On 2009-11-28 23:22, Wes Morgan wrote:
> Simple question:
> 
> 8 devices in a raidz2
> or
> 4 devices in a raidz x 2

With the first configuration, any two drives can fail, and all data is
still preserved.

With the second configuration, if two drives fail within the same RAID
set, you are screwed.

E.g., if safety is your concern, I would definitely choose the first
configuration. :)



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