From: Phil Turmel <philip@turmel.org>
To: Peter Grandi <pg@lxra2.for.sabi.co.UK>
Cc: Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: SMART, RAID and real world experience of failures.
Date: Mon, 09 Jan 2012 11:37:19 -0500 [thread overview]
Message-ID: <4F0B17BF.3020507@turmel.org> (raw)
In-Reply-To: <20234.65226.464692.42166@tree.ty.sabi.co.UK>
On 01/09/2012 09:50 AM, Peter Grandi wrote:
>>>> I got a SMART error email yesterday from my home server with a 4
>>>> x 1Tb RAID6. [ ... ]
>
>>>> That's an (euphemism alert) imaginative setup. Why not a 4
>>>> drive RAID10? In general there are vanishingly few cases in
>>>> which RAID6 makes sense, and in the 4 drive case a RAID10
>>>> makes even more sense than usual. Especially with the really
>>>> cool setup options that MD RAID10 offers.
>
>> In this case, the raid6 can suffer the loss of any two drives
>> and continue operating. Raid10 cannot, unless you give up
>> more space for triple redundancy.
>
> When I see arguments like this I am sometimes (euphemism alert)
> enthused by their (euphemism alert) profundity. A defense of a
> 4-drive RAID6 is a particularly compelling example, and this
> type of (euphemism alert) astute observation even more so.
<< plonk >>
next prev parent reply other threads:[~2012-01-09 16:37 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-05 23:53 SMART, RAID and real world experience of failures Steven Haigh
2012-01-06 0:42 ` Roman Mamedov
2012-01-06 11:22 ` Peter Grandi
2012-01-06 11:40 ` Steven Haigh
2012-01-06 13:38 ` Phil Turmel
2012-01-09 14:50 ` Peter Grandi
2012-01-09 16:37 ` Phil Turmel [this message]
2012-01-09 20:23 ` Peter Grandi
2012-01-09 13:59 ` Peter Grandi
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