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

Here's the general syntax:

Note: If /dev/sda doesn't work, try a generic device node like /dev/sg0 or /dev/sg1 . 3. Read S.M.A.R.T. Data for a Specific Drive

When disks are connected through such a controller, the Linux kernel does not see the individual physical drives. Instead, it only sees the , the RAID volume presented as /dev/sda , /dev/sdb , etc. When you run smartctl -i /dev/sda , the command is essentially trying to query that virtual drive, which doesn't have a SMART interface to report, triggering the error: Here's the general syntax: Note: If /dev/sda doesn't

This error can be alarming, but it does not mean your disk is failing. It is a friendly message from smartctl (part of the smartmontools package) informing you that you cannot access the physical disk directly through the standard Linux device node. Because a hardware RAID controller sits between the operating system and the physical drives, a special device type parameter is required to “peer through” the RAID card and retrieve S.M.A.R.T. data from the actual hard drive or SSD.

If you want the Smartmontools daemon ( smartd ) to monitor these drives automatically, update your /etc/smartd.conf file: Data for a Specific Drive When disks are

smartctl -a -d megaraid,0 /dev/sda

When the correct ID is found, smartctl will output the disk’s model, serial number, and indicate that SMART support is available. This brute‑force approach is handy in a pinch, but it should be noted that it can be time-consuming if many IDs are tested. It is a friendly message from smartctl (part

You will likely encounter the following exact error string in your terminal or system logs: Smartctl open device: /dev/sda failed: DELL or MegaRAID controller, please try adding '-d megaraid,N'

Once you have the ID, test it with smartctl -i -d megaraid,N /dev/sda . A successful command will display the physical drive's model, serial number, and SMART capability.

The easiest method. Running smartctl --scan often yields the exact syntax needed.

: sudo smartctl -a -d megaraid,12 /dev/sda