Smartctl Open Device Dev Sda Failed Dell Or Megaraid Controller Please Try Adding 39d Megaraid N 39 Extra Quality ❲FULL – 2026❳

In this example, 0 is the logical drive number (N) associated with the disk drive /dev/sda . You may need to adjust this value depending on your specific configuration.

storcli /c0 /eall /sall show

: If you have RAID management tools installed, run:

To use the correct N value, you first need to identify the (DID) assigned by the controller. In this example, 0 is the logical drive

If the above solution doesn't work, you can try adding additional options:

If you are running smartctl -a /dev/sda on a Dell PowerEdge server and seeing the error , it is likely because your disks are behind a Dell PERC or MegaRAID hardware controller .

This command will display information about all logical drives configured on the MegaRAID controller. Look for the logical drive number associated with the disk drive you want to monitor. If the above solution doesn't work, you can

(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 (

Your system will generate an output list mapping structural system endpoints:

For example, to check the very first physical disk on the controller, try running: smartctl -a -d megaraid,0 /dev/sda Use code with caution. (device type) flag to specify the controller type

The controller abstracts physical disks, making them appear as a logical unit.

Dell’s PERC cards (especially Series 7, 8, 9, 10, and 11) are rebranded LSI MegaRAID controllers. Therefore, the generic -d megaraid,N flag is the correct interface.

This message appears because smartctl (part of the smartmontools package) expects to communicate directly with a physical disk. However, a RAID controller presents a (e.g., /dev/sda , /dev/sdb ) to the operating system. The OS sees only the logical array, not the individual physical disks behind the controller. To get S.M.A.R.T. data from each physical drive, you must bypass this virtualization using the -d megaraid,N flag.