Re: Use RAID-6!

[Roy Sigurd Karlsbakk <roy@karlsbakk.net>]

> > Also, maybe this should be on an FAQ/RAID tutorial somewhere?
> 
> Question is, where should it be put so that people read it and
> actually
> understand it.
> 
> This article is from 2007:
> 
> <http://www.zdnet.com/blog/storage/why-raid-5-stops-working-in-2009/162>
> 
> I've had people argue with me that the above article is wrong, but I
> never
> udnerstood their logic. To me it makes perfect sense and I always go
> RAID6.
> 
> I also think the work having more than 2 parity drives was very
> promising.
> I'd rather have a 20 drive volume with 4 parity drives than to LVM
> together two 10 drive RAID6:es (apart from obvious performance
> penalties).

I've been running RAIDz3 for a backup machine (zfs receive from the main box), and the write performance was rather low. I'd rather use lvm or raid-something over different raid-6 volumes. Spread out the risk factor. With ~8 drives in each raid-6 set, the risk is low enough to allow for rather large volumes.

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Vennlige hilsener / Best regards

roy
--
Roy Sigurd Karlsbakk
(+47) 98013356
roy@karlsbakk.net
http://blogg.karlsbakk.net/
GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt
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