Re: SMART, RAID and real world experience of failures.

On 01/09/2012 09:50 AM, Peter Grandi wrote:

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I got a SMART error email yesterday from my home server with a 4
x 1Tb RAID6. [ ... ]

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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.

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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.

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