[geeks] recommended dual channel LVD controller, PC

[geeks at litfire.com]

> > People here would probably go for the
> > "striped-mirror" approach rather than the "mirrored-stripe"
approach,
> > since it's more tolerant to failures.
> 
> How could that be?
> 
> 1 2    (assumes 2 mirrors or stripes, total of 4 disks in array)
> 
> - -    This is a mirrored stripe.
> - -    Any one disk in a column can fail. Beyond that, you're toast.
> 
> : :    This is a striped mirror.
>        Again, any one disk in a column can fail.
> 
> (sorry if my ASCII "art" doesn't do it for you... it was half for my
> benefit, to make sure I was asking an intelligent question. :P)
> 
> So how's it more tolerant to failures?

With 6 or more disks, you'll see the benefit in that if you mirror
stripes, and one disk from each stripe fails, you lose data.  If you
stripe across mirrors you can lose up to three disks (one from each
mirror) without losing data.

-Anthony