zpool iostat -v tank
               capacity     operations    bandwidth
pool         used  avail   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
tank        12.0T  2.48T    253     32  29.4M  2.61M
  mirror    1.55T   271G     32      3  3.80M   318K
    da5         -      -     29      3  3.68M   318K
    da2         -      -     29      3  3.68M   318K
  mirror    1.56T   257G     33      3  3.84M   328K
    da10        -      -     30      3  3.72M   329K
    da3         -      -     30      3  3.72M   329K
  mirror    1.56T   254G     33      3  3.85M   330K
    da6         -      -     30      3  3.73M   330K
    ad10        -      -     30      3  3.73M   330K
  mirror    1.57T   252G     33      4  3.85M   331K
    ad4         -      -     30      3  3.73M   331K
    da1         -      -     30      3  3.73M   331K
  mirror    1.55T   266G     33      4  3.82M   332K
    da8         -      -     30      3  3.70M   332K
    da0         -      -     30      3  3.70M   332K
  mirror    1.53T   292G     32      4  3.78M   333K
    da9         -      -     29      3  3.65M   333K
    da4         -      -     29      3  3.65M   333K
  mirror    1.52T   298G     32      4  3.76M   333K
    ad6         -      -     29      3  3.64M   334K
    ad8         -      -     29      3  3.64M   334K
  mirror    1.17T   653G     22      4  2.69M   364K
    da7         -      -     21      3  2.61M   364K
    ad1         -      -     21      3  2.61M   364K
----------  -----  -----  -----  -----  -----  -----