Smartctl: Open Device Dev Sda Failed Dell Or Megaraid Controller Please Try Adding 39d Megaraid N 39 Extra Quality [top]

When using on a Dell server equipped with a MegaRAID (PERC) controller, you may encounter the following error:

Using StorCLI: Run sudo storcli /c0 /eall /sall show and look for the DID (Device ID) column. When using on a Dell server equipped with

Why This Happens

1. The RAID Controller Abstraction

When disks are connected to a hardware RAID controller (Dell PERC H330, H730P, H740P, or LSI MegaRAID series), the controller aggregates physical disks into logical Virtual Disks (VDs). The OS kernel driver (e.g., megaraid_sas) presents only the VD as a standard SCSI block device – /dev/sda. or LSI MegaRAID series)

On RHEL/CentOS:

Method 2: smartctl --scan

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