> So the question becomes, what are the tradeoffs between running a two-way
> mirror vs. running RAID-Z on two disks?
A two-way mirror would be better -- no parity generation, and you have
the ability to attach/detach for more or less replication. (We could
optimize the RAID-Z code for the two-di
One of the obvious big differences between RAID-Z and RAID-5 is that Z can be
run on just two disks. I do note it suggests you really want three, but I've
run it on two (slices rather than whole disks, in a small test environment) and
it works and recovers from removal or severe damage to eithe
