Re: Why do I need 4 disks for a raid6?

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Goswin von Brederlow wrote:
> 
> Actually the definition I read was that raid6 is like raid5 but
> allowing for 2 or more disks to fail without loss. So a 15 disks raid
> with 10 data blocks and 5 parity blocks per stripe would also be raid6.
> 

2 or more *arbitrary* disks.  You can't, say, have two RAID-5s and call
the combination a RAID-6, because they're not all there.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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