# for i in a b c d; do echo /dev/sdd; smartctl -a /dev/sdd | grep -e Rotation -e Power_Cycle -e Model -e Power_On; echo; done /dev/sdd Model Family: Hitachi Ultrastar 7K3000 Device Model: Hitachi HUA723020ALA641 Rotation Rate: 7200 rpm 9 Power_On_Hours 0x0012 098 098 000 Old_age Always - 17002 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 28 /dev/sdd Model Family: Hitachi Ultrastar 7K3000 Device Model: Hitachi HUA723020ALA641 Rotation Rate: 7200 rpm 9 Power_On_Hours 0x0012 098 098 000 Old_age Always - 17002 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 28 /dev/sdd Model Family: Hitachi Ultrastar 7K3000 Device Model: Hitachi HUA723020ALA641 Rotation Rate: 7200 rpm 9 Power_On_Hours 0x0012 098 098 000 Old_age Always - 17002 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 28 /dev/sdd Model Family: Hitachi Ultrastar 7K3000 Device Model: Hitachi HUA723020ALA641 Rotation Rate: 7200 rpm 9 Power_On_Hours 0x0012 098 098 000 Old_age Always - 17002 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 28