This error typically occurs when smartctl is unable to directly access the disk drive /dev/sda due to the presence of a RAID controller, specifically a Dell or MegaRAID controller.
To find the logical drive number, you can use the megacli command, which is a utility provided by LSI (now part of Broadcom) for managing MegaRAID controllers. This error typically occurs when smartctl is unable
Here's an example:
To resolve this issue, you need to inform smartctl about the presence of the MegaRAID controller and the logical drive number (N) associated with the disk drive you want to monitor. You can do this by adding the -d megaraid,N option to the smartctl command. You can do this by adding the -d
smartctl -d megaraid,0 /dev/sda 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. 0 /dev/sda In this example