> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Jim Klimov
> Well, there is at least a couple of failure scenarios where
> copies>1 are good:
> 1) A single-disk pool, as in a laptop. Noise on the bus,
>     media degradation, or any other reason to misread or
>     miswrite a block can result in a failed pool. 

How does mac/win/lin handle this situation?  (Not counting btrfs.)

Such noise might result in a temporarily faulted pool (blue screen of death) 
that is fully recovered after reboot.  Meanwhile you're always paying for it in 
terms of performance, and it's all solvable via pool redundancy.
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