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

The error message "smartctl open device /dev/sda failed: DELL or MegaRaid controller, please try adding '-d megaraid,N'"

• smartctl man page: https://linux.die.net/man/8/smartctl
• MegaRAID documentation: https://www.broadcom.com/support/megaraid
• Dell support: https://www.dell.com/support

1. Install the perccli utility on your Dell system.
2. Run the command perccli /c0 /eall /Q to list all physical disks.
3. Note the disk number (e.g., PD:2) you want to monitor.
4. Use the smartctl command with the -d megaraid,N option:

🔧 Find the correct disk number

List all physical disks in the RAID volume: The error message "smartctl open device /dev/sda failed:

• Use storcli/perccli/megacli/storcd to enumerate physical drives and map to OS paths.
• Use smartctl with the megaraid,sN option: smartctl -a -d megaraid,N /dev/sdX (N = physical drive index).
• Example fallback: smartctl -d megaraid,0 /dev/sgX (try sg devices if sd fails).

2. Not installing smartmontools

On Debian/Ubuntu:

Why does the error appear?

Hardware RAID controllers (like Dell PERC H330, H730, H740, or LSI MegaRAID 9260, 9361) create RAID volumes (logical drives). To the operating system, these volumes look like single block devices—/dev/sda, /dev/sdb, etc. But smartctl tries to send S.M.A.R.T. commands directly to that device file. The RAID controller intercepts those commands and does not pass them to individual physical drives unless explicitly instructed. smartctl man page: https://linux

If you want, I can produce: