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

NVMe drives behind a Dell PERC 11 or 12 (e.g., H755) are often passed through as NVMe namespaces, but if they are RAIDed, you may need -d nvme-megaraid,N on newer smartmontools (version 7.3+).

By ignoring the garbled "39" text and identifying the correct disk index, you will successfully bypass the "Device Open Failed" error and retrieve your SMART data. NVMe drives behind a Dell PERC 11 or 12 (e

Replace N with the ID found in the previous step (e.g., 0 , 1 , 11 , etc.). : smartctl -a -d megaraid,N /dev/sda . : smartctl -a -d megaraid,N /dev/sda

To resolve this issue, you need to inform smartctl about the presence of the MegaRAID controller and the logical drive number (N) associated with the disk drive you want to monitor. You can do this by adding the -d megaraid,N option to the smartctl command. : smartctl -a -d megaraid