Smartctl Open Device Dev Sda Failed Dell Or Megaraid Controller Please Try Adding 39d Megaraid N 39 Extra Quality !new! (95% BEST)

The "39" in the text is likely a remnant of a specific example (e.g., using drive 39), but the correct syntax requires you to identify your specific drive number.

megacli -pdlist -a0

You can view event logs for error detection with a command like MegaCLI -AdpEventLog -GetEvents -f events.log -a0 .

The smartctl open device failed error is a standard and expected response when querying a hardware RAID controller. It is not an error with the drives, but a notification that you are not using the proper syntax to access the physical devices behind the controller.

Focus your attention on four key attributes: The "39" in the text is likely a

(version 7.0 or higher is recommended) as newer versions have significantly better support for Dell PERC and LSI MegaRAID controllers. Unix & Linux Stack Exchange If you'd like, let me know: server model (e.g., Dell PowerEdge R730) you're using. smartctl --scan If you're trying to monitor a

An even simpler, tool‑free method is to examine /proc/scsi/scsi :

Here's an example:

Depending on your drive type (SATA vs. SAS) and controller version, you might need a slightly different flag: For SATA drives behind MegaRAID: sudo smartctl -a -d sat+megaraid,0 /dev/sda Using the SCSI generic path: still fails, try the generic bus path: sudo smartctl -a -d megaraid,0 /dev/bus/0 If you are using a very old version of smartmontools , consider updating it It is not an error with the drives,

The "smartctl open device dev sda failed" error on Dell or MegaRAID controllers can be resolved by adding the "-d megaraid,N" option to your smartctl commands. By understanding the cause of the issue and following the steps outlined in this article, you'll be able to access crucial drive information and monitor the health of your hard drives and SSDs. Remember to verify the drive's existence, update smartctl and MegaRAID firmware, and use the correct logical drive number or physical drive number to avoid errors.

Running a standard query directly against the logical block device fails: sudo smartctl -a /dev/sda Use code with caution.

Self‑tests can also be run on physical disks using the same -d megaraid,N syntax.

Here is the breakdown of what is wrong and how to fix it: smartctl --scan If you're trying to monitor a

This error occurs because your controller hides the physical drive's SMART data behind a RAID layer . To fix it, you must tell which specific physical disk ID to query. 🛠️ The Direct Fix Run the command using the -d megaraid,N flag, where is the drive's physical ID (starting from 0). Try this first (for the first drive): sudo smartctl -a -d megaraid,0 /dev/sda Use code with caution. Copied to clipboard 🔍 How to find the correct ID (N) megaraid,0

Open the configuration file (usually located at /etc/smartmontools/smartd.conf or /etc/smartd.conf ): nano /etc/smartmontools/smartd.conf Use code with caution. Comment out any default scanning lines like DEVICESCAN .

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 .

List all physical disks in the RAID volume: