LPIC-2 Practice Question: Block Devices, Filesystems and Advanced Storage
This LPIC-2 practice question tests your understanding of block devices, filesystems and advanced storage. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An administrator wants to create a thin provisioned LVM pool and a thin volume. Which sequence of commands is correct?
Option B is correct because it uses the correct LVM commands to create a thin provisioned pool and a thin volume. The first command, `lvcreate -L 10G --thinpool vg/pool`, creates a thin pool named 'pool' in volume group 'vg' with a 10G metadata and data area. The second command, `lvcreate -V 5G --thin vg/pool/thinvol`, creates a thin volume named 'thinvol' within that pool, specifying the virtual size with `-V`. The `--thinpool` and `--thin` flags are the proper LVM2 syntax for thin provisioning.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the `-T` flag (which can create both thin pools and thin volumes depending on context) with the explicit `--thinpool` and `--thin` flags, and often forget that creating a thin volume requires specifying the pool path (e.g., `vg/pool/thinvol`) and the `--thin` flag, not just a regular `lvcreate` with `-n`.
Detailed technical explanation
How to think about this question
Thin provisioning in LVM2 uses a thin pool, which is a special logical volume that stores metadata and data chunks. The thin pool is created with `--thinpool` (or `-T`), and thin volumes are created with `--thin` (or `-T` for volumes, but the syntax differs). The `-V` flag specifies the virtual size, which can be larger than the pool's data size, allowing over-provisioning. Under the hood, LVM allocates data blocks on demand from the pool, and the metadata tracks which blocks belong to which thin volume. A common real-world scenario is virtual machine disk images, where thin provisioning allows efficient storage utilization by allocating space only as VMs write data.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the LPIC-2 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Block Devices, Filesystems and Advanced Storage — This question tests Block Devices, Filesystems and Advanced Storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: lvcreate -L 10G --thinpool vg/pool; lvcreate -V 5G --thin vg/pool/thinvol — Option B is correct because it uses the correct LVM commands to create a thin provisioned pool and a thin volume. The first command, `lvcreate -L 10G --thinpool vg/pool`, creates a thin pool named 'pool' in volume group 'vg' with a 10G metadata and data area. The second command, `lvcreate -V 5G --thin vg/pool/thinvol`, creates a thin volume named 'thinvol' within that pool, specifying the virtual size with `-V`. The `--thinpool` and `--thin` flags are the proper LVM2 syntax for thin provisioning.
What should I do if I get this LPIC-2 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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