The error message "smartctl open device /dev/sda failed: DELL or MegaRaid controller, please try adding '-d megaraid,N'"
(device type) flag to specify the controller type and the physical drive index ( Command Syntax: sudo smartctl -a -d megaraid,N /dev/sda Use code with caution. Copied to clipboard : Displays all SMART information. -d megaraid,N : Points to the cap N raised to the t h power physical drive (starting at 0). : The logical device handle for the RAID controller. Step-by-Step Guide 1. Find the Physical Drive Index ( The error message "smartctl open device /dev/sda failed:
sudo yum install smartmontools