Smartctl Open Device Dev Sda Failed Dell Or Megaraid Controller Please Try Adding 39d Megaraid N 39 Extra Quality — No Survey

smartctl -d megaraid,0 /dev/sda

Before you can run the command, you need the "Device ID" or "Physical Disk Number" for each drive. You can find this using the following tools:

If you are running smartctl -a /dev/sda on a Dell PowerEdge server and seeing the error , it is likely because your disks are behind a Dell PERC or MegaRAID hardware controller . smartctl -d megaraid,0 /dev/sda Before you can run

The "39" in the text is likely a remnant of a specific example (e.g., using drive 39), but the correct syntax requires you to identify your specific drive number.

smartctl -i -d megaraid,0 /dev/sda smartctl -i -d megaraid,1 /dev/sda smartctl -i -d megaraid,0 /dev/sda smartctl -i -d

smartctl -a -d megaraid,N /dev/sda

It sounds like you’re encountering the classic smartctl error when trying to access a physical disk behind a Dell PERC (MegaRAID) controller. The message you're referencing is essentially telling you to use the correct device syntax: -d megaraid,N . monitoring for every disk behind your RAID controller

smartctl -d megaraid,39 -a /dev/sda

smartctl -t short -d megaraid,0 /dev/sda

By understanding how to find the correct using storcli , /proc/scsi/scsi , or a brute‑force scan loop, you can unlock the full diagnostic power of S.M.A.R.T. monitoring for every disk behind your RAID controller. Once you retrieve the data, focus your attention on the raw values of Reallocated_Sector_Ct , Current_Pending_Sector , and UDMA_CRC_Error_Count to catch disk failures and connection problems before they cause data loss.