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

Decoding the "smartctl open device dev/sda failed" Error on Dell PERC/MegaRAID Controllers

not a bug

The error is – it's a deliberate safety mechanism. The RAID controller hides physical disks by design. Using -d megaraid,N is the correct, supported, and safe method to query SMART data on Dell PERC and LSI MegaRAID controllers. Ignoring this flag risks querying the wrong device or corrupting the RAID metadata.

A more robust script would parse storcli output to get exact PD list. Decoding the "smartctl open device dev/sda failed" Error

Troubleshooting "smartctl open device dev sda failed dell or megaraid controller" Error: A Comprehensive Guide

Device ID

To use the correct N value, you first need to identify the (DID) assigned by the controller. Run a short self-test on physical disk #0:

• Suggest firmware/driver updates, switching controller to IT/pass-through mode, or using vendor health tools.

Run a short self-test on physical disk #0:

If you have the RAID management tools installed, you can list all physical drives and their Device IDs sudo storcli /c0 /eall /sall show (Look at the "DID" column). sudo megacli -pdlist -a0 | grep "Device Id" Server Fault 💡 Common Variations Suggest firmware/driver updates