[Gllug] RAID 1+0 vs 0+1

[Rich Walker]

"Steve Nelson" <sanelson at gmail.com> writes:

> Hello Chums,
>
> A debate arose on irc as to whether there's a difference between RAID
> 1+0 and 0+1.  I contend that 1+0 is more resilient.  Our esteemed Mr
> Brooks disagreed, and stated "There is no difference".  As my attemtps
> to draw ASCII depictions of disks kept getting interrupted, I  thought
> I'd email to the list instead.

For one-disk-failure: no difference.

For two-disk-failure: mirror then stripe better, by a small margin. 

For cable failure or controller failure ... different question.

cheers, Rich 

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