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

/dev/sda -d megaraid,0 -a -o on -S on -m admin@example.com /dev/sda -d megaraid,1 -a -o on -S on -m admin@example.com ... The error smartctl open device: /dev/sda failed: DELL or MegaRAID controller, please try adding -d megaraid,N is not a bug—it is a sign that you need to tell smartctl which physical drive behind the RAID controller to query.

A more robust script would parse storcli output to get exact PD list. 1. Using the wrong N If you try -d megaraid,999 on a system with only 4 drives, smartctl will fail similarly. Always verify the correct IDs with storcli or by trial with small range. 2. Not installing smartmontools On Debian/Ubuntu: /dev/sda -d megaraid,0 -a -o on -S on -m admin@example

sudo apt install smartmontools On RHEL/CentOS: /dev/sda -d megaraid

Example output snippet:

Better: use storcli to see which PD belongs to which DG (drive group / logical drive). Here is a simple Bash script to iterate through all possible physical disks on /dev/sda (adjust if needed): please try adding -d megaraid

storcli /c0 /eall /sall show That lists all physical disks in controller 0. Look for DID (Device ID) or ID – that is your N .