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

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

When attempting to run a simple smartctl -a /dev/sda (or smartctl -i /dev/sda ) on a Dell PowerEdge server (or any system using an LSI MegaRAID or Dell PERC RAID controller), you often encounter this frustrating output: Before using smartctl , you need to map

This error occurs when smartctl cannot directly access a physical disk ( /dev/sda ) because the disk is behind a or MegaRAID controller. The OS sees a virtual drive, not the raw physical disk. Before using smartctl

To fix this, you must use the -d megaraid,N flag to "pass through" the RAID controller and address a specific physical disk ID (N). 1. Identify the Correct Device ID (N) The number you must use the -d megaraid