smartctl is a command-line tool used to control and query S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) data from hard drives and SSDs. It helps predict drive failures by reporting attributes like Reallocated Sectors, Reported Uncorrectable Errors, Temperature, and more.
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: smartctl is a command-line tool used to control and query S
megacli -ldinfo -lall
The standard smartctl command expects direct ATA/SCSI passthrough. A RAID controller intercepts these commands. Without special instructions, the controller cannot know which physical disk behind the virtual drive you want to query. The error occurs because standard smartctl commands cannot
: sudo smartctl -a -d megaraid,12 /dev/sda A RAID controller intercepts these commands
to find the physical drive IDs. For many Dell servers, the first drive is often ID Run the corrected command: with your drive's ID and run the command with sudo smartctl -a -d megaraid,N /dev/sda Use code with caution. Copied to clipboard Example for the first drive: sudo smartctl -a -d megaraid,0 /dev/sda For SATA drives behind the controller: You may need sat+megaraid,N www.couyon.net Why this happens