NCQ enabled, 46 disks
1 stream, 1 thread per stream

heavy# zpool iostat 1
               capacity     operations    bandwidth
pool         used  avail   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
...
test        40.0G  20.8T    143      0  17.8M      0
test        40.0G  20.8T      0      0      0      0
test        40.0G  20.8T  2.79K      0   356M      0
test        40.0G  20.8T  9.17K      0  1.14G      0
test        40.0G  20.8T  10.1K      0  1.26G      0
test        40.0G  20.8T  10.7K      0  1.34G      0
test        40.0G  20.8T  9.78K      0  1.22G      0
test        40.0G  20.8T  10.5K      0  1.31G      0
test        40.0G  20.8T  10.9K      0  1.36G      0
test        40.0G  20.8T  10.2K      0  1.28G      0
test        40.0G  20.8T  7.73K      0   989M      0
test        40.0G  20.8T  7.49K      0   958M      0
test        40.0G  20.8T  9.90K      0  1.24G      0
test        40.0G  20.8T  10.9K      0  1.36G      0
test        40.0G  20.8T  10.2K      0  1.27G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  9.58K      0  1.20G      0
test        40.0G  20.8T  9.77K      0  1.22G      0
test        40.0G  20.8T  9.87K      0  1.23G      0
test        40.0G  20.8T  9.26K      0  1.16G      0
test        40.0G  20.8T  9.86K      0  1.23G      0
test        40.0G  20.8T  10.4K      0  1.29G      0
test        40.0G  20.8T  11.0K      0  1.37G      0
test        40.0G  20.8T  10.3K      0  1.29G      0
test        40.0G  20.8T  10.2K      0  1.27G      0
test        40.0G  20.8T  10.9K      0  1.36G      0
test        40.0G  20.8T  10.1K      0  1.27G      0
test        40.0G  20.8T  10.2K      0  1.28G      0
test        40.0G  20.8T  10.0K      0  1.25G      0
test        40.0G  20.8T  10.5K      0  1.31G      0
test        40.0G  20.8T  10.6K      0  1.33G      0
test        40.0G  20.8T  10.2K      0  1.27G      0
test        40.0G  20.8T  10.6K      0  1.32G      0
test        40.0G  20.8T  10.3K      0  1.29G      0
test        40.0G  20.8T  10.6K      0  1.32G      0
test        40.0G  20.8T  10.7K      0  1.34G      0
test        40.0G  20.8T  10.0K      0  1.25G      0
test        40.0G  20.8T  9.96K      0  1.25G      0
test        40.0G  20.8T  11.0K      0  1.38G      0
test        40.0G  20.8T  10.6K      0  1.32G      0
test        40.0G  20.8T  10.5K      0  1.31G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  10.6K      0  1.33G      0
test        40.0G  20.8T  10.3K      0  1.29G      0
test        40.0G  20.8T  9.89K      0  1.24G      0
test        40.0G  20.8T  11.0K      0  1.37G      0
test        40.0G  20.8T  9.60K      0  1.20G      0
test        40.0G  20.8T  9.99K      0  1.25G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  10.6K      0  1.32G      0
test        40.0G  20.8T  10.7K      0  1.33G      0
test        40.0G  20.8T  11.2K      0  1.40G      0
test        40.0G  20.8T  10.5K      0  1.32G      0
test        40.0G  20.8T  9.98K      0  1.25G      0
test        40.0G  20.8T  11.0K      0  1.38G      0
test        40.0G  20.8T  9.77K      0  1.22G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  10.9K      0  1.36G      0
test        40.0G  20.8T  10.7K      0  1.34G      0
test        40.0G  20.8T  10.6K      0  1.33G      0
test        40.0G  20.8T  10.8K      0  1.35G      0
test        40.0G  20.8T  9.91K      0  1.24G      0
test        40.0G  20.8T  8.57K      0  1.07G      0
test        40.0G  20.8T  9.01K      0  1.13G      0
test        40.0G  20.8T  8.32K      0  1.04G      0
test        40.0G  20.8T  10.5K      0  1.31G      0
test        40.0G  20.8T  9.64K      0  1.20G      0
test        40.0G  20.8T  10.5K      0  1.31G      0
test        40.0G  20.8T  10.6K      0  1.32G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  5.69K      0   728M      0
test        40.0G  20.8T  9.42K      0  1.18G      0
test        40.0G  20.8T  9.65K      0  1.21G      0
test        40.0G  20.8T  10.9K      0  1.36G      0
test        40.0G  20.8T  11.1K      0  1.39G      0
test        40.0G  20.8T  9.64K      0  1.21G      0
test        40.0G  20.8T  10.6K      0  1.33G      0
test        40.0G  20.8T  10.9K      0  1.36G      0
test        40.0G  20.8T  10.3K      0  1.29G      0
test        40.0G  20.8T  10.7K      0  1.34G      0
test        40.0G  20.8T  9.64K      0  1.21G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  10.9K      0  1.36G      0
test        40.0G  20.8T  10.8K      0  1.35G      0
test        40.0G  20.8T  9.71K      0  1.21G      0
test        40.0G  20.8T  11.1K      0  1.39G      0
test        40.0G  20.8T  10.8K      0  1.35G      0
test        40.0G  20.8T  10.6K      0  1.32G      0
test        40.0G  20.8T  11.0K      0  1.38G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  10.8K      0  1.36G      0
test        40.0G  20.8T  10.7K      0  1.33G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  9.74K      0  1.22G      0
test        40.0G  20.8T  10.3K      0  1.28G      0
test        40.0G  20.8T  11.1K      0  1.38G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  10.0K      0  1.25G      0
test        40.0G  20.8T  11.1K      0  1.39G      0
test        40.0G  20.8T  8.16K      0  1.02G      0
test        40.0G  20.8T  10.8K      0  1.36G      0
test        40.0G  20.8T  10.7K      0  1.34G      0
test        40.0G  20.8T  9.94K      0  1.24G      0
test        40.0G  20.8T  10.5K      0  1.32G      0
test        40.0G  20.8T  10.3K      0  1.29G      0
test        40.0G  20.8T  10.8K      0  1.35G      0
test        40.0G  20.8T  9.26K      0  1.16G      0
test        40.0G  20.8T  10.6K      0  1.33G      0
test        40.0G  20.8T  10.5K      0  1.32G      0
test        40.0G  20.8T  10.2K      0  1.28G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  9.93K      0  1.24G      0
test        40.0G  20.8T  10.6K      0  1.33G      0
test        40.0G  20.8T  9.90K      0  1.24G      0
test        40.0G  20.8T  10.1K      0  1.27G      0
test        40.0G  20.8T  10.4K      0  1.30G      0
test        40.0G  20.8T  10.2K      0  1.27G      0
test        40.0G  20.8T  10.6K      0  1.32G      0
test        40.0G  20.8T  10.3K      0  1.29G      0
test        40.0G  20.8T  1.59K      0   204M      0