Smartctl Open Device Dev Sda Failed Dell Or Megaraid Controller Please Try Adding 39d Megaraid N 39 Extra Quality Info

SMART Health Status: OK

Sometimes helpful for direct-attached drives, but less so behind RAID. Try:

:You need to find the correct value for N (the Device ID). You can automatically list all detectable physical drives and their IDs by running: smartctl --scan

Output example: