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

The RAID controller does not expose the physical disks through the standard SCSI layer. This is common with entry‑level RAID cards or those operating in a “simple” RAID mode.

Look at the output table under the EID:Slt (Enclosure ID : Slot ID) column. If your Enclosure ID is 252 and Slot is 2 , your smartctl command will look like this: smartctl -a -d megaraid,252,2 /dev/sda Use code with caution. Method 2: Using MegaCli (Older Systems)

to see if the utility can automatically detect the correct mapping for you. Run the Correct Smartctl Command Once you have the index (for example, ), use the (device type) flag: For SAS/SCSI Drives smartctl -a -d megaraid,11 /dev/sda For SATA Drives sat+megaraid smartctl -a -d sat+megaraid,11 /dev/sda www.couyon.net Summary Table: Syntax by Drive Type Drive Type Syntax Command smartctl -a -d megaraid,N /dev/sda smartctl -a -d sat+megaraid,N /dev/sda Troubleshooting Tips Error with smartctl on Dell/Megaraid · Issue #660 - GitHub

When you run the smartctl command on a system with a Dell or MegaRAID controller, you might encounter the following error: The RAID controller does not expose the physical

– less reliable, but if you have 4 drives in RAID10, IDs 0 and 1 are likely the first mirror pair.

/dev/sda -d megaraid,N # N is your device ID

To use the correct N value, you first need to identify the (DID) assigned by the controller. If your Enclosure ID is 252 and Slot

By understanding how to find the correct using storcli , /proc/scsi/scsi , or a brute‑force scan loop, you can unlock the full diagnostic power of S.M.A.R.T. monitoring for every disk behind your RAID controller. Once you retrieve the data, focus your attention on the raw values of Reallocated_Sector_Ct , Current_Pending_Sector , and UDMA_CRC_Error_Count to catch disk failures and connection problems before they cause data loss.

Once you have the ID, run the command against the controller's device node (usually /dev/sda or /dev/bus/0 ). Cannot get smartctl working - Unix & Linux Stack Exchange

Scaleway's documentation provides a practical example combining megacli and smartctl to check every drive in a system: /dev/sda -d megaraid,N # N is your device

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

: Run sudo storcli /c0 /eall /sall show and look for the DID (Device ID) column.

This specifically instructs smartctl to use SCSI-ATA Translation (SAT) over the MegaRAID interface. Troubleshooting