Smartctl Open Device Dev Sda Failed Dell Or Megaraid Controller Please Try Adding 39d Megaraid N 39 Extra Quality __top__ May 2026

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

The error message occurs because smartctl is trying to talk directly to a virtual RAID volume (e.g., /dev/sda ) instead of the physical hard drives hidden behind the controller.

Fix: smartctl "Open Device /dev/sda Failed" on Dell MegaRAID Controllers "smartctl open device: /dev/sda failed: DELL or MegaRAID

Introduction

This error occurs because the operating system sees your RAID controller (e.g., a LSI MegaRAID please try adding '-d megaraid