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

smartctl -t short -d megaraid,2 /dev/sda

For production servers, manually checking smartctl on each physical disk is tedious. Consider:

If you are writing a script or noting this down for future reference, the clear syntax is:

By ignoring the garbled "39" text and identifying the correct disk index, you will successfully bypass the "Device Open Failed" error and retrieve your SMART data. smartctl -t short -d megaraid,2 /dev/sda

Here is a simple Bash script to iterate through all possible physical disks on /dev/sda (adjust if needed):

#!/bin/bash
LOGICAL_DEV="/dev/sda"
MAX_DISKS=32  # Adjust based on max expected drives
for N in $(seq 0 $((MAX_DISKS-1))); do
echo "Checking $LOGICAL_DEV -d megaraid,$N"
smartctl -H -d megaraid,$N $LOGICAL_DEV > /dev/null 2>&1
if [ $? -eq 0 ]; then
echo "Disk $N exists. Health status:"
smartctl -H -d megaraid,$N $LOGICAL_DEV | grep "SMART overall-health"
echo "---"
else
# No more disks found
break
fi
done

A more robust script would parse storcli output to get exact PD list.

Subject: Fixing smartctl "open device dev/sda failed" on Dell/MegaRAID

Content:
To fix the error smartctl open device /dev/sda failed, you must specify the RAID controller interface and logical drive number. For production servers, manually checking smartctl on each

Use this syntax:

smartctl -a -d megaraid,<Enclosure_Device> /dev/sdX

Example for a Dell PERC controller:

smartctl -a -d megaraid,0 /dev/sda

💡 Pro tip: Use -d megaraid,N where N is the physical disk index behind the controller (0,1,2...). Run smartctl --scan to find available devices. A more robust script would parse storcli output

Before using smartctl, you need to map logical drives to physical disk IDs.