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

If the operational environment maps the controller cleanly, the utility will return a list matching this format:

If you know disk sizes differ, you can try:

In this case, the device IDs are 7 , 6 , 5 , and 4 . To query the first physical disk, you would run: If the operational environment maps the controller cleanly,

If you are trying to run smartctl on a Dell server with a MegaRAID controller, you must tell the command which controller and which physical drive to query.

Because standard S.M.A.R.T. commands cannot pass straight through the RAID abstraction layer, smartctl fails unless you explicitly tell it how to bypass the controller and target a specific physical drive slot. commands cannot pass straight through the RAID abstraction

In this example, 0 is the logical drive number (N) associated with the disk drive /dev/sda . You may need to adjust this value depending on your specific configuration.

SMART Health Status: OK

Under this output configuration, your primary disk targets correspond to IDs 0 and 1 . Step 2: Query the Specific Physical Drive

The root cause is that standard ATA/SCSI commands sent to a raw disk device cannot pass through the RAID controller. The controller must be told exactly which physical disk you want to query by its using the -d megaraid,N option. SMART Health Status: OK Under this output configuration,

Smartctl open device: /dev/sda failed: DELL or MegaRaid controller, please try adding '-d megaraid,N'

for d in 0 1 2 3; do smartctl -H -d megaraid,$d /dev/sda; done