Smartctl Open Device Dev Sda Failed Dell Or Megaraid Controller Please Try Adding 39d Megaraid N 39 Extra Quality |top| Jun 2026

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To set up automatic monitoring, you must configure /etc/smartd.conf with the correct -d megaraid,N directives. Here is what an entry for a physical disk with ID 0 might look like:

When you run the smartctl command on a system with a Dell or MegaRAID controller, you might encounter the following error: You can also try: To set up automatic

The error message suggests that the disk drive is behind a RAID controller, which is a hardware component that manages multiple disk drives as a single logical unit. In this case, the controller is a Dell or MegaRAID device. The smartctl utility needs to communicate with the disk drive through this controller, but it doesn't know how to do so by default.

In this output, the physical drives appear with Type: Direct-Access and Vendor: ATA . While this method does not explicitly give you the DID , it helps you verify that the drives are being detected and often shows you the controller‑specific ID under the Id: field. The smartctl utility needs to communicate with the

Automated mapping algorithm

In this article, we will explain:

The smartctl utility itself can scan for available devices behind RAID controllers. Run:

If you have any other questions, please share the output of smartctl --scan or the storcli commands you run. That information will make it much easier to offer specific guidance for your configuration. Automated mapping algorithm In this article, we will

sudo smartctl -c -d megaraid,N /dev/sda