Interesting, although makes sense ;) Now, I wonder about reliability (with large 2-3Tb drives and long scrub/resilver/replace times): say I have 12 drives in my box. I can lay them out as 4*3-disk raidz1, 3*4-disk-raidz1 or a 1*12-disk raidz3 with nearly the same capacity (8-9 data disks plus parity). I see that with more vdevs the IOPS will grow - does this translate to better resilver and scrub times as well? Smaller raidz sets can be more easily spread over different controllers and JBOD boxes, which is also an interesting factor... How good or bad is the expected reliability of 3*4-disk-raidz1 vs 1*12-disk raidz3, so which of the tradeoffs is better - more vdevs or more parity to survive loss of ANY 3 disks vs. "right" 3 disks? Thanks, //Jim Klimov
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