LFCS Storage Management Practice Question
An administrator has created an LVM thin pool. Which command should be used to create a thin logical volume named 'thinvol' of size 100GB from the thin pool 'pool1' in volume group 'vg1'?
⚠ Common exam trap
It's easy for candidates to confuse the `-L` flag (used for standard LVs or pool sizes) with the `-V` flag (required for thin volumes), leading them to select option D, which incorrectly uses `-L` instead of `-V` for the thin volume's virtual size.
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
✓
lvcreate -V 100G -T vg1/pool1 --name thinvol
The `lvcreate` command for thin logical volumes requires the `-V` flag to specify the virtual size of the thin volume and the `-T` flag to reference the thin pool. The syntax `-V 100G -T vg1/pool1 --name thinvol` correctly creates a thin logical volume named 'thinvol' with a virtual size of 100GB from the thin pool 'pool1' in volume group 'vg1'.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
lvcreate -L 100G -n thinvol vg1
Why it's wrong here
Creates regular LV, not thin.
- ✗
lvcreate -s vg1/pool1 -n thinvol
Why it's wrong here
Creates snapshot, not thin.
- ✓
lvcreate -V 100G -T vg1/pool1 --name thinvol
Why this is correct
Correct command.
- ✗
lvcreate -L 100G -T vg1/pool1 --name thinvol
Why it's wrong here
Uses -L for size, which is for regular LVs.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LFCS practice question is part of Courseiva's free Linux Foundation 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 LFCS exam.