What are the technical reasons to not have mismatched replication levels? For example, I am creating a zpool with three raidz vdevs. Two with 8 disks and one with only 7. zpool allows me to do this with -f of course, but I can''t find much documentation on why I shouldn''t other than it''s not recommended. I can understand why, perhaps, for situations where you add new vdevs to your pool later and accidentally use some that aren''t redundant to the same degree others are -- you might unknowingly compromise your vpool in that way... But as long as we''re aware, is there any performance other other technical reason I shouldn''t set up my vdevs as I have above? Thanks, Ray