I require a new high capacity 8 disk zpool.  The disks I will be
purchasing (Samsung or Hitachi) have an Error Rate (non-recoverable,
bits read) of 1 in 10^14 and will be 2TB.  I'm staying clear of WD
because they have the new 2048b sectors which don't play nice with ZFS
at the moment.

My question is, how do I determine which of the following zpool and
vdev configuration I should run to maximize space whilst mitigating
rebuild failure risk?

1. 2x RAIDZ(3+1) vdev
2. 1x RAIDZ(7+1) vdev
3. 1x RAIDZ2(7+1) vdev


I just want to prove I shouldn't run a plain old RAID5 (RAIDZ) with 8x
2TB disks.

Cheers
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