If you can't install MegaCLI or perccli , you can brute-force find the ID by running a simple loop. A community approach suggests iterating smartctl from 0 to around 30 to find all disks in smartctl , as smartctl -d ,0 /dev/sda is the same as smartctl -d ,0 /dev/sde if you keep using N .
Dell and MegaRAID controllers use a proprietary interface to manage their RAID configurations, which can make it challenging for utilities like smartctl to access the drives. By default, these controllers do not allow direct access to the drives, which leads to the "open device" error.
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Run smartctl --scan to see a list of attached devices and their corresponding IDs.
Even when using the correct megaraid,N syntax, you may still encounter issues: If you can't install MegaCLI or perccli ,
If you get a No such device error, the disk numbering might not start at 0. In some scenarios:
If you are troubleshooting a live system and know the approximate number of drives, you can simply increment N until you find the correct ones. By default, these controllers do not allow direct
To efficiently monitor all physical disks, use a script to loop through the potential Device ID values.
sudo smartctl -a -d megaraid,0 /dev/sda