# zpool iostat -v
                                           capacity     operations    bandwidth
pool                                    alloc   free   read  write   read  write
--------------------------------------  -----  -----  -----  -----  -----  -----
tank                                    10.3T   605G     54      8  5.69M   419K
  raidz1                                10.3T   605G     54      8  5.69M   419K
    sda                                     -      -     28      2  1.96M   150K
    sdb                                     -      -     27      2  1.91M   149K
    sdc                                     -      -     27      3  1.96M   150K
    replacing                               -      -  1.05K     95  38.4M   386K
      sdd                                   -      -     25      2  1.92M   149K
      ata-ST4000DM000-1F2168_Z300MHWF-part2      -      -      0    861     22  38.7M