An administrator created a RAID 0 array with two disks using mdadm. Later, the administrator realizes that the array should have been RAID 1 for redundancy. The array contains important data. What should the administrator do?

Use mdadm --grow to change the RAID level from 0 to 1

Back up the data, recreate the array as RAID 1, and restore the data

Use mdadm --assemble to reassemble the array as RAID 1

Add a third disk to the array and convert it to RAID 1

A server has a RAID 5 array that contains the root filesystem. The administrator needs to ensure that the array is assembled before the root filesystem is mounted during boot. Which configuration is essential?

Add the array to /etc/fstab with the mount point /

Include the array in /etc/mdadm/mdadm.conf and regenerate the initramfs

Set the kernel parameter root=/dev/md0

Run mdadm --assemble --scan in a startup script

A server has a RAID 5 array with the root filesystem. The administrator needs to add a new disk to the array to increase its capacity. The administrator runs mdadm --grow /dev/md0 --raid-devices=5 /dev/sde. The command succeeds, but after a reboot, the array is not assembled and the system fails to boot. What is the most likely cause?

The array was not resized with mdadm --grow --size

The initramfs was not updated after the array was grown

The new disk was not partitioned correctly

The new disk was not added to /etc/fstab

A RAID 6 array on a busy production server has degraded after one disk failed. The administrator has a replacement disk available. The array is currently rebuilding, but the administrator notices that the rebuild is causing significant performance degradation on the server. What should the administrator do to minimize the impact on production while still completing the rebuild?

Increase the rebuild speed to finish faster

Stop the rebuild and resume it during off-peak hours

Remove the new disk and wait for a less busy time to add it

Limit the rebuild speed using /sys/block/md0/md/sync_speed_min and sync_speed_max

A Linux administrator created a RAID 1 array with two disks using mdadm. After a reboot, the array does not automatically assemble. The administrator wants to ensure the array is recognized and assembled at boot without manual intervention. Which step is required?

Add an entry to /etc/mdadm/mdadm.conf and update the initramfs

Create a filesystem on the array and mount it with a UUID in /etc/fstab

Run mdadm --assemble --scan at every boot manually

Use mdadm --detail --scan to write the array configuration to /etc/mdadm.conf

LPI LPIC-2:Linux Engineer (201-450)

Domain 5Objective 1

204.1 Configuring RAID (weight: 3) LPIC-2 Practice Questions (Page 4)

Part of the Topic 204: Advanced Storage Device Administration domain, which makes up ~10% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–6 in this domain), expect 1–2 from this objective — we provide 20 practice questions to prepare you well beyond it. (estimate)

20questions here

4free pages

5concepts

Questions 16–20

16application · medium
An administrator created a RAID 0 array with two disks using mdadm. Later, the administrator realizes that the array should have been RAID 1 for redundancy. The array contains important data. What should the administrator do?
Select an answer first
17application · medium
A server has a RAID 5 array that contains the root filesystem. The administrator needs to ensure that the array is assembled before the root filesystem is mounted during boot. Which configuration is essential?
Select an answer first
18expert · hard
A server has a RAID 5 array with the root filesystem. The administrator needs to add a new disk to the array to increase its capacity. The administrator runs mdadm --grow /dev/md0 --raid-devices=5 /dev/sde. The command succeeds, but after a reboot, the array is not assembled and the system fails to boot. What is the most likely cause?
Select an answer first
19expert · hard
A RAID 6 array on a busy production server has degraded after one disk failed. The administrator has a replacement disk available. The array is currently rebuilding, but the administrator notices that the rebuild is causing significant performance degradation on the server. What should the administrator do to minimize the impact on production while still completing the rebuild?
Select an answer first
20application · medium
A Linux administrator created a RAID 1 array with two disks using mdadm. After a reboot, the array does not automatically assemble. The administrator wants to ensure the array is recognized and assembled at boot without manual intervention. Which step is required?
Select an answer first

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204.1 Configuring RAID (weight: 3) LPIC-2 Practice Questions (Page 4)

Questions 16–20

An administrator created a RAID 0 array with two disks using mdadm. Later, the administrator realizes that the array should have been RAID 1 for redundancy. The array contains important data. What should the administrator do?

A server has a RAID 5 array that contains the root filesystem. The administrator needs to ensure that the array is assembled before the root filesystem is mounted during boot. Which configuration is essential?

A Linux administrator created a RAID 1 array with two disks using mdadm. After a reboot, the array does not automatically assemble. The administrator wants to ensure the array is recognized and assembled at boot without manual intervention. Which step is required?

Keep studying — Topic 204: Advanced Storage Device Administration