Smartctl Open Device Dev Sda Failed Dell Or Megaraid Controller Please Try Adding 39d Megaraid N 39 Extra Quality __exclusive__ -

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) as a single logical device, effectively hiding the physical health data of the individual drives behind it

To overcome this limitation, you can use the "-d megaraid,N" option with smartctl, where "N" represents the logical drive number or the physical drive number on the MegaRAID controller.

✅ Works perfectly once you add -d megaraid,N . Common mistake: Forgetting to specify the physical disk index. Best practice: Use --scan to discover disks + indexes automatically. or ) as a single logical device, effectively

/dev/bus/0 -d megaraid,0 # /dev/bus/0 [megaraid_disk_00], SCSI device /dev/bus/0 -d megaraid,1 # /dev/bus/0 [megaraid_disk_01], SCSI device Use code with caution.

: The /dev/sdX device passed to smartctl does not need to be the exact physical disk you are targeting—it is merely a handle to access the RAID controller. The -d megaraid,N parameter tells the controller which physical disk to query.

For example:

If the above solution doesn't work, you can try adding additional options:

PD LIST : ======= EID:Slt DID State DG Size Intf Med 16:0 0 Onln 0 1.818 TB SATA HDD 16:1 1 Onln 0 1.818 TB SATA HDD

When attempting to check the health of a hard drive behind a Dell PERC (PowerEdge RAID Controller) or MegaRAID controller using smartctl , you may encounter the following error: Best practice: Use --scan to discover disks +

The output will expose how the software perceives the hardware matrix. You will typically see lines structured like this:

When using on a Dell server equipped with a MegaRAID (PERC) controller, you may encounter the following error:

/dev/sda -d megaraid,N # N is your device ID The -d megaraid,N parameter tells the controller which