CompTIA Exam XK0-005 Topic 4 Question 23 Discussion

The following commands can help you confirm that the new RAID adapter has been recognized by the Linux system:

dmesg: This command displays the kernel messages, which can show the information about the newly detected hardware device. You can usedmesg | grep -i raidto filter the output for RAID-related messages.

lshw -class disk: This command lists the disk devices on the system, including the RAID controller and its model name.You can uselshw -class disk | grep -i raidto filter the output for RAID-related information1.

The other commands are not relevant for this purpose. For example:

rmmod: This command removes a module from the Linux kernel, which is not useful for detecting a new device.

ls -l /etc: This command lists the files and directories in the /etc directory, which is not related to hardware devices.

pvdisplay: This command displays the attributes of physical volumes, which are part of the logical volume management (LVM) system, not the RAID system.

rmdir /dev: This command removes an empty directory, which is not helpful for detecting a new device. Moreover, /dev is a special directory that contains device files, and should not be removed.