LPIC-2 Practice Question: Block Devices, Filesystems and Advanced Storage
Exhibit
# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg-data 20G 16G 4.0G 80% /data
Refer to the exhibit. The /data filesystem is nearly full. The administrator has added a new disk /dev/sdc with 10GB capacity. The VG currently has no free space. Which steps will increase the available space for /data using LVM and ext4?
⚠ Common exam trap
The trap here is that candidates often forget the mandatory pvcreate step or confuse the extent-based -l option with the size-based -L option, leading them to choose options that either skip a critical step or allocate only partial capacity.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
pvcreate /dev/sdc; vgextend vg /dev/sdc; lvextend -l +100%FREE /dev/vg/data; resize2fs /dev/vg/data
It follows the proper LVM workflow: create a physical volume (pvcreate), add it to the volume group (vgextend), extend the logical volume using all free space in the VG (lvextend -l +100%FREE), and then resize the ext4 filesystem (resize2fs). This ensures the new 10GB disk is fully utilized for /data.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
vgextend vg /dev/sdc; lvextend -L +10G /dev/vg/data; resize2fs /dev/vg/data
Why it's wrong here
Missing pvcreate; the disk must be initialized as a PV first.
- ✗
pvcreate /dev/sdc; lvextend -L +10G /dev/vg/data; resize2fs /dev/vg/data
Why it's wrong here
Missing vgextend; the PV must be added to the VG before extending the LV.
- ✗
pvcreate /dev/sdc; vgextend vg /dev/sdc; lvextend -l +50%FREE /dev/vg/data; resize2fs /dev/vg/data
Why it's wrong here
Using 50%FREE does not use all available space.
- ✓
pvcreate /dev/sdc; vgextend vg /dev/sdc; lvextend -l +100%FREE /dev/vg/data; resize2fs /dev/vg/data
Why this is correct
Correctly adds the PV, extends VG, extends LV with all free space, and resizes the filesystem.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LPIC-2 practice question is part of Courseiva's free LPI certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the LPIC-2 exam.