Linux 4.9.0-18-amd64 (...) avg-cpu: %user %nice %system %iowait %steal %idle 3.09 0.02 2.56 1.77 0.00 92.55 Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn sda 236.13 25492.09 220.05 532020 4592 sdb 8.39 257.21 0.00 5368 0 sdc 4.02 105.61 0.00 2204 0 sdd 3.88 101.20 0.00 2112 0