Smartctl Open Device Dev Sda Failed Dell Or Megaraid Controller Please Try Adding 39d Megaraid N 39 Extra Quality |best| May 2026

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.

Note: On some systems, you may need to use /dev/bus/0 instead of /dev/sda to ensure stability. Recommended Monitoring Configuration It sounds like you’re encountering the classic smartctl

Common Mistakes & Troubleshooting

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. Use perccli/storcli to list drives and feed physical

• Use perccli/storcli to list drives and feed physical device IDs to smartctl -d megaraid,N.

Check SMART status for physical drive 0: Check SMART status for physical drive 0:

• -a : Display all S.M.A.R.T. information (or use -i for identity, -H for health, -A for attributes)
• -d megaraid,N : Disk type and physical drive number
• /dev/sda : The logical device corresponding to the RAID array containing that physical disk

• Usage: smart-probe [--auto] /dev/sdX
• Modes: