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

First, ensure you have smartmontools installed and find the correct device node (usually /dev/sda or /dev/sgX ). You can use lsblk to list devices. 2. Probe the Drive Structure

This is exactly the syntax you should use. I have had numerous reports from users that using storcli to get the DID and then plugging it into the command is the most reliable method.

It may show /dev/sda -d megaraid,0 if previously detected, but not guaranteed.

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.

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

Manually appending flag variables is helpful for ad-hoc terminal diagnostics, but production monitoring requires daemon persistence. To automate these definitions so monitoring daemons (like smartd ) don't crash or throw error loops, edit the primary smartmontools daemon configuration file:

In this article, we will explain:

Look closely at the resulting table for the or Slot Number column: Probe the Drive Structure This is exactly the

smartctl (Self-Monitoring, Analysis, and Reporting Technology) is a utility used to monitor and control hard drives and solid-state drives (SSDs) that support the SMART (Self-Monitoring, Analysis, and Reporting Technology) standard. It provides valuable information about a disk's health, performance, and potential issues, allowing users to take proactive measures to prevent data loss and system crashes.

If you'd like to , I can provide a script that loops through all drives behind the controller. Let me know what you'd like to do next! Share public link

smartctl -a -d megaraid,N /dev/sda

) as a single logical device, effectively hiding the physical health data of the individual drives behind it If you have any other questions, please share

✅ Works perfectly once you add -d megaraid,N . Common mistake: Forgetting to specify the physical disk index. Best practice: Use --scan to discover disks + indexes automatically.

smartctl -a -d megaraid,E,S /dev/sda # Example: Enclosure 252, Slot 0 smartctl -a -d megaraid,252,0 /dev/sda Use code with caution. How to Find Your Physical Drive Slot IDs (N)

for N in $(seq 0 $((MAX_DISKS-1))); do echo "Checking $LOGICAL_DEV -d megaraid,$N" smartctl -H -d megaraid,$N $LOGICAL_DEV > /dev/null 2>&1 if [ $? -eq 0 ]; then echo "Disk $N exists. Health status:" smartctl -H -d megaraid,$N $LOGICAL_DEV | grep "SMART overall-health" echo "---" else # No more disks found break fi done

To pull drive telemetry, you must leverage the controller's pass-through capability by identifying the internal device ID ( N ) of each disk inside the chassis. Step 1: Automatically Scan for Internal Device IDs

By mastering the -d megaraid,N parameter, you can unlock full S.M.A.R.T. visibility on your Dell or MegaRAID-based servers, allowing proactive drive replacement and preventing unexpected data loss.