An even simpler, tool‑free method is to examine /proc/scsi/scsi :
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smartctl open device /dev/sda failed: Cannot read SMART data or smartctl open device /dev/sda failed: Device not found
The error occurs because standard smartctl commands cannot "see" through a Dell PERC or MegaRAID controller to the individual physical disks. To fix this, you must specify the raid type and the physical disk's ID using the -d megaraid,N flag. How to Fix the Error To successfully query your drive, follow these steps: An even simpler, tool‑free method is to examine
# Replace X with physical disk number (0-based) smartctl -a -d megaraid,X /dev/sda
(Note: Replace storcli with perccli on older or proprietary Dell installations).
To find the correct disk number, you can use the following command: Can’t copy the link right now
Many newcomers try -d megaraid,1 expecting the first drive, but it is 0 .
When using on a Dell server equipped with a MegaRAID (PERC) controller, you may encounter the following error:
To use the "-d megaraid,N" option, you'll need to determine the logical drive number or physical drive number on the MegaRAID controller. You can do this by: To fix this, you must specify the raid
smartctl (Self-Monitoring, Analysis, and Reporting Technology) is a utility used to monitor the health and performance of hard drives. It can provide detailed information about a drive's status, including temperature, power cycles, and error rates. On the other hand, MegaRAID is a popular RAID (Redundant Array of Independent Disks) controller developed by LSI (now part of Broadcom). It's widely used in Dell servers to manage and configure RAID sets.
storcli /c0 /eall /sall show
Look closely at the resulting output table for the column:
If the above solution doesn't work, you can try adding additional options:
If you’re managing a Dell PowerEdge server or any system equipped with an LSI/Avago MegaRAID or Dell PERC RAID controller, you’ve likely encountered this frustrating error when trying to check your disk health: