Check HDD health with hardware RAID: MegaCli

(1) Find out the device ID's using MegaCli too

Megacli64 -PDlist -a0|grep Device.Id

Device Id: 7
Device Id: 6
Device Id: 5
Device Id: 4

(2) Check the HDD health on each device using smartctl

smartctl -a -d sat+megaraid,7 /dev/sda|grep 'PASSED\|Reallocated_Sector_Ct\|Temperature_Celsius'
smartctl -a -d sat+megaraid,6 /dev/sda|grep 'PASSED\|Reallocated_Sector_Ct\|Temperature_Celsius'
smartctl -a -d sat+megaraid,5 /dev/sda|grep 'PASSED\|Reallocated_Sector_Ct\|Temperature_Celsius'
smartctl -a -d sat+megaraid,4 /dev/sda|grep 'PASSED\|Reallocated_Sector_Ct\|Temperature_Celsius'